CN103647115B - A kind of application process taking lithium-rich manganese-based solid-solution material as anodal battery - Google Patents
A kind of application process taking lithium-rich manganese-based solid-solution material as anodal battery Download PDFInfo
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Abstract
The invention provides a kind of application process taking lithium-rich manganese-based solid-solution material as anodal battery, comprise the following steps: to carrying out charge discharge activation processing taking lithium-rich manganese-based solid-solution material as anodal battery; Battery after described activation is carried out to charge and discharge cycles; The charge cutoff voltage when blanking voltage of the latter's circulation time is less than activation processing. The present invention is by activation, make lithium-rich manganese-based solid-solution material discharge all told, layer structure transforms to spinel structure rapidly, then makes battery under temperate condition, carry out charge and discharge cycles, and material still has higher capacity under lower charge cutoff voltage. Meanwhile, under temperate condition, the lithium ion not removing plays the effect of supporting construction, makes lithium-rich manganese-based solid-solution material holding structure in electrochemistry cyclic process stable, without obvious voltage drop, thereby has effectively suppressed voltage attenuation.
Description
Technical field
The present invention relates to lithium ion battery field, particularly taking lithium-rich manganese-based solid-solution material asThe application process of anodal battery.
Background technology
Lithium ion battery is a kind of mechanism of new electrochemical power sources, is born in the beginning of the nineties in last century. OrderFront lithium ion battery has been monopolized mobile phone and notebook computer market, simultaneously in military and Aero-SpaceThe application in field increases gradually, military communication, torpedo, submarine, guided missile, flying apsaras, lunar exploration etc.Its figure of field is also seen everywhere. In electric tool, electric automobile (EV/PHEV/HEV), storageThe field lithium ion batteries such as energy have become the most competitive candidate products, electric automobile and energy storageBecome the following maximum potential market of lithium ion battery.
Lithium ion battery is made up of positive pole, negative pole, electrolyte and barrier film. Wherein, positive electrodeBe determine lithium ion battery the aspect such as voltage, capacity, security, cycle performance important because ofElement. Lithium iron phosphate dynamic battery energy density is only 90Wh/kg left and right at present, LiMn2O4 powerBattery is about 140Wh/kg. And as lithium-ion-power cell electrode material of future generation, high ratioThe lithium-rich manganese-based anode material of capacity becomes the focus of positive electrode research, is expected to make power lithium batteryThe energy density in pond breaks through 250Wh/kg.
Lithium-rich manganese-based solid solution cathode material can be used general formula xLi[Li1/3Mn2/3]O2·(1–x)LiMO2Express, wherein M is transition metal, has very high specific discharge capacity, is current anodal material used2 times of left and right of material actual capacity; Owing to having used a large amount of Mn elements in material, this material not onlyPrice is low, and security is good, environmentally friendly. CauseThis, xLi[Li1/3Mn2/3]O2·(1–x)LiMO2Material is considered as lithium ion of future generation by numerous scholarsThe choosing of the ideal of cell positive material. Research thinks that lithium-rich manganese-based solid solution cathode material isLi2MnO3Metallizing thing LiMO2The continuous solid solution of (M is transition metal), its moleculeFormula can be written as xLi2MnO3·(1-x)LiMO2, but lithium-rich manganese-based solid-solution material is filling firstElectricity is changed in quality for xMnO after finishing to deviate from Li2·(1-x)MO2, layer structure is unstable, transition goldBelong to ion to the migration of lithium layer, structure changes to spinelle, the stratiform-spinelle hybrid junctions obtainingThe plateau potential of structure reduces, and forms voltage attenuation progressively. The harm of voltage attenuation maximum isAccurately the situation of voltage, capacity in monitoring battery system, makes lithium ion battery uniformityProblem, safety issue is more outstanding, has seriously restricted it and has focused on security at electrokinetic cell etc.Battery in application. On the other hand, according to output electric energy W=UIt, battery after voltage dropThe energy density that can provide declines.
At present, for the research work of voltage attenuation mainly, metal ion content coated from surface,The aspect such as bulk phase-doped is launched, but is not solved preferably all the time. ChongminWangDeng people (FormationoftheSpinelPhaseintheLayeredCompositeCathodeUsedinLi-IonBatteries.ACSnano, 2013,760-767.) studyLi1.2Ni0.2Mn0.6O2The structural change of material in cyclic process, utilizes AlF3After coated, onlyCan be by the process backward delay of voltage attenuation tens of circles, but can not stop this process. ConnectVirtue waits people (SynthesisandelectrochemicalperformanceoflonglifespanLi-richLi1+x(Ni0.37Mn0.63)1-xO2cathodematerialsforLithium-ionbatteries.ElectrochimicaActa95 (2013) 87 – 94.) synthesize differenceThe Li of lithium content1+x(Ni0.37Mn0.63)1-xO2Sample (x=0.123,0.111,0.086,0.070,0.031), study the impact of different rich lithium amounts on voltage attenuation in circulation. Find to work asWhen x=0.086-0.123, there is the highest middle threshold voltage. From first circle to the 100 circles, intermediate value electricityPress and decay to 3.5V from 3.75V, average every circle decay 2.5mV, remains very fast decay speedDegree.
Summary of the invention
The technical problem that the present invention solves be to provide a kind of taking lithium-rich manganese-based solid-solution material asThe application process of anodal battery, can effectively suppress voltage attenuation. Battery described in the present inventionNegative pole select lithium metal, if adopt other negative poles (as graphite, MCMB, silicon-carbonMaterial), need carry out according to other negative poles the adaptation of charge and discharge system with respect to the potential difference of lithium metalProperty is adjusted.
The invention discloses a kind of application side taking lithium-rich manganese-based solid-solution material as anodal batteryMethod, comprises the following steps:
(A) to carrying out charge discharge taking lithium-rich manganese-based solid-solution material as anodal batteryActivation processing; (B) battery after described activation is carried out to charge and discharge cycles use;
Charge cutoff voltage when described step (B) is carried out charge and discharge cycles use is less than step(A) charge cutoff voltage while carrying out charge discharge activation processing.
Application process according to claim 1, is characterized in that, described step (A)In, the charge cutoff voltage of described activation processing is greater than 4.4V.
Preferably, in described step (A), the number of turns of described activation processing is for being not less than 1 circle,Starting voltage is for being greater than 0V.
Preferably, in described step (A), the charge cutoff voltage of described activation processing is4.5～5.0V; The described number of turns discharging and recharging is 2～10 circles, and starting voltage is 2.0～2.8V.
Preferably, in described step (B), described charge cutoff voltage is 4.4～5.0V.
Preferably, charge cutoff voltage when described step (B) is carried out charge and discharge cycles useThe voltage difference of the charge cutoff voltage while carrying out charge discharge activation processing with step (A)Be 0.01～1V.
Preferably, in described step (A), the charge cutoff voltage of described activation processing with riseVoltage difference between beginning voltage is 1～4V.
Compared with prior art, the present invention is taking lithium-rich manganese-based solid-solution material as anodal batteryApplication process, comprises the following steps: to entering taking lithium-rich manganese-based solid-solution material as anodal batteryRow charge discharge activation processing; Battery after described activation is carried out to charge and discharge cycles use;The charge cutoff voltage when blanking voltage of the latter's circulation time is less than activation processing. The present invention firstBy the activation to battery, under higher charge cutoff voltage, battery capacity is all ejected,Impel the layer structure of lithium-rich manganese-based solid-solution material to transform to spinel structure rapidly, then logicalCross control battery and under temperate condition, carry out charge and discharge cycles, make lithium-rich manganese-based solid-solution materialUnder lower charge cutoff voltage, still there is higher capacity. Meanwhile, under gentle condition,Because lithium ion does not remove completely, remain in the part lithium in lithium-rich manganese-based solid-solution materialIon plays the effect of supporting construction, makes lithium-rich manganese-based solid-solution material in electrochemistry cyclic processMiddle maintenance is stable, no longer includes obvious voltage drop, thereby has effectively suppressed voltage attenuation. AndAnd the method is simple and practical, application is convenient.
Brief description of the drawings
Fig. 1 be in embodiment 1 rich lithium material at 2.0～4.6V activation, 5 circles and at 2.0～4.4VThe front 105 circle charging and discharging curves that recycle;
Fig. 2 be in embodiment 1 rich lithium material at 2.0～4.6V activation, 5 circles and at 2.0～4.4VThe electric discharge average voltage curve of front 105 circles that recycle;
Fig. 3 is that front 105 circles that in comparative example 1, rich lithium material recycles at 2.0～4.6V charge and dischargeElectricity curve;
Fig. 4 is the front 105 circle electric discharges that in comparative example 1, rich lithium material recycles at 2.0～4.6VAverage voltage curve.
Detailed description of the invention
In order further to understand the present invention, below in conjunction with embodiment to the preferred embodiment of the inventionBe described, but should be appreciated that these are described is for further illustrating feature of the present inventionAnd advantage, instead of limiting to the claimed invention.
The embodiment of the invention discloses a kind of taking lithium-rich manganese-based solid-solution material as anodal batteryApplication process, comprises the following steps:
(A) to carrying out charge discharge taking lithium-rich manganese-based solid-solution material as anodal batteryActivation processing;
The charge cutoff voltage of described activation processing is greater than 4.4V;
(B) battery after described activation is carried out to charge and discharge cycles use;
Charge cutoff voltage when described step (B) is carried out charge and discharge cycles use is less than step(A) charge cutoff voltage while carrying out charge discharge activation processing.
The present invention is taking lithium-rich manganese-based solid-solution material as anodal battery is as object, the present invention coupleBe not particularly limited commercially available prod taking lithium-rich manganese-based solid-solution material as anodal battery in described. To the rich lithium material xLi of any composition2MnO3·(1–x)LiM(M")O2All be suitable for, itsIn 0 < x < 1, M is transition metal, can be in nickel, cobalt, manganese, iron, boron, aluminium, vanadiumOne or more; M " is doped chemical, comprises titanium, chromium, copper, zinc, zirconium, niobium, molybdenum.
In the present invention, first to carrying out electricity taking lithium-rich manganese-based solid-solution material as anodal batteryChemistry discharges and recharges activation processing. The charge cutoff voltage of described activation processing is preferably greater than 4.4V,The charge cutoff voltage of described activation processing is preferably 4.5～5.0V. The described number of turns discharging and recharging isBe not less than 1 circle, be preferably 2～10 circles, more preferably 2～5 circles. Rising of described activation processingBeginning voltage is for being greater than 0V, and described starting voltage is preferably 2.0～2.8V. Filling of described activation processingVoltage difference between electricity blanking voltage and starting voltage is preferably 1～4V, more preferably2.0～3.0V. By the activation to battery, under higher charge cutoff voltage by battery capacityAll eject, impel the layer structure of lithium-rich manganese-based solid-solution material rapidly to spinel structureTransform.
After activation, the battery after described activation, under lower charge cutoff voltage condition, is enteredRow charge and discharge cycles is used. Described charge cutoff voltage is preferably 4.4～5.0V, more preferably4.4～4.6V. Charge cutoff voltage when described step (B) is carried out charge and discharge cycles use is less thanCharge cutoff voltage when step (A) is carried out charge discharge activation processing. Described step(B) charge cutoff voltage and step (A) while carrying out charge and discharge cycles use are carried out electrochemistryThe voltage difference of the charge cutoff voltage while discharging and recharging activation processing is preferably 0.01～1V, more preferablyBe 0.1～0.5V. Lithium-rich manganese-based solid-solution material after overactivation, in stable state, passes throughControl battery and under temperate condition, carry out charge and discharge cycles, described lithium-rich manganese-based solid-solution material existsUnder lower charge cutoff voltage, still there is higher capacity. Meanwhile, under gentle condition,Because lithium ion does not remove completely, remain in the part lithium in lithium-rich manganese-based solid-solution materialIon plays the effect of supporting construction, makes lithium-rich manganese-based solid-solution material in electrochemistry cyclic processMiddle maintenance is stable, no longer includes obvious voltage drop, thereby has effectively suppressed voltage attenuation.
In order further to understand the present invention, below in conjunction with embodiment to provided by the invention with rich lithiumManganese based solid solution material is that the application process of anodal battery describes, protection model of the present inventionEnclose and be not limited by the following examples. In each embodiment with described lithium-rich manganese-based anode material, electricitySeparate liquid and lithium sheet negative pole and assemble according to method well known in the art, can obtain lithium-ion electricPond.
Embodiment 1
By rich lithium material 0.5Li2MnO3·0.5Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 5 circles between 2.0-4.6V, activate.
By the electrochemistry circulation between 2.0-4.4V of the battery after activation, use.
Utilize electrochemical test to carry out cycle performance test to lithium ion battery, probe temperature is25 DEG C, charging and discharging currents is 50mA/g, obtains charge and discharge cycles curve as shown in Figure 1, Fig. 2It is corresponding average voltage curve. As shown in Figure 1, embodiment 1 is by lithium-rich manganese-based anode materialThe battery of assembling is after the 2.0-4.6V activation of 5 circles, and the 6th circle discharges and recharges model at 2.0-4.4VDischarge capacity in enclosing is 228.4mAh/g, and the 105th circle Capacitance reserve is at 200.0mAh/g.Electric discharge average voltage is calculated divided by discharge capacity by the specific energy that discharges, as shown in Figure 2. PutElectricity average voltage decays to the 3.4883V of the 105th circle from the 3.5293V of the 6th circle, on average everyCircle decay 0.4100mV.
Embodiment 2
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 5 circles between 2.5-5.0V, activate.
By the electrochemistry circulation between 2.0-4.48V of the battery after activation, use the 6thThe capacity of circle reaches 260.1mAh/g, and the 105th circle Capacitance reserve is at 246.7mAh/g. Through 105The circulation of circle, voltage decays to 3.5245V by 3.5823 of the 6th circle, average every circle decay0.5780mV。
Embodiment 3
By rich lithium material 0.5Li2MnO3·0.5Li(Co0.2Mn0.3Ni0.5)O2Be assembled into lithium-ion electricPond.
By described lithium ion battery electrochemistry circulation 10 circles between 2.0-4.7V, activate.
By the electrochemistry circulation between 2.0-4.2V of the battery after activation, use, through 105The circulation of circle, voltage decays to 3.5124V by the 3.5166V of the 6th circle, average every circle decay0.0420mV。
Embodiment 4
By rich lithium material 0.6Li2MnO3·0.4Li(Co0.2Mn0.3Ni0.5)O2Be assembled into lithium-ion electricPond.
By described lithium ion battery electrochemistry circulation 5 circles between 2.0-4.5V, activate.
By the electrochemistry circulation between 2.0-4.4V of the battery after activation, use, through 105The circulation of circle, voltage decays to 3.5124V by the 3.5764V of the 6th circle, average every circle decay0.6400mV。
Embodiment 5
By rich lithium material 0.2Li2MnO3·0.8Li(Mn0.5Ni0.48Cu0.02)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 3 circles between 2.0-4.5V, activate.
By the electrochemistry circulation between 2.0-4.4V of the battery after activation, use, through 103The circulation of circle, voltage decays to 3.5102V by the 3.5685V of the 4th circle, average every circle decay0.5830mV。
Embodiment 6
By rich lithium material 0.5Li2MnO3·0.5Li(Mn0.5Ni0.5)O2Be assembled into lithium ion battery.
By described lithium ion battery electrochemistry circulation 3 circles between 2.0-4.6V, activate.
By the electrochemistry circulation between 2.0-4.4V of the battery after activation, use. Through 103The circulation of circle, voltage decays to 3.5096V by the 3.5478V of the 4th circle, average every circle decay0.3820mV。
Embodiment 7
By rich lithium material 0.4Li2MnO3·0.6Li(Co0.3Mn0.2Ni0.46Zn0.04)O2Be assembled into lithium fromSub-battery.
By described lithium ion battery electrochemistry circulation 2 circles between 2.5-4.8V, activate.
By the electrochemistry circulation between 2.0-4.4V of the battery after activation, use, through 102The circulation of circle, voltage decays to 3.4843V by the 3.5274V of the 3rd circle, average every circle decay0.4310mV。
Embodiment 8
By rich lithium material 0.8Li2MnO3·0.2Li(Co0.95Fe0.04Nb0.01)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 1 circle between 2.5-4.8V, activate.
By the electrochemistry circulation between 2.0-4.2V of the battery after activation, use. Through 101The circulation of circle, voltage decays to 3.4826V by the 3.5348V of the 2nd circle, average every circle decay0.5220mV。
Embodiment 9
By rich lithium material 0.1Li2MnO3·0.8Li(Co0.1Mn0.1Ni0.8)O2Be assembled into lithium-ion electricPond.
By described lithium ion battery electrochemistry circulation 1 circle between 2.8-5.0V, activate.
By the electrochemistry circulation between 2.5-4.2V of the battery after activation, use, through 101The circulation of circle, voltage decays to 3.4887V by the 3.5305V of the 2nd circle, average every circle decay0.4180mV。
Embodiment 10
By rich lithium material 0.5Li2MnO3·0.5Li(Co0.33Mn0.34Ni0.3B0.03)O2Be assembled into lithium fromSub-battery.
By described lithium ion battery electrochemistry circulation 6 circles between 2.8-4.5V, activate.
By the electrochemistry circulation between 2.5-4.45V of the battery after activation, use processThe circulation of 106 circles, voltage decays to 3.4782 by the 3.5105V of the 7th circle, and average every circle declinesSubtract 0.3230mV.
Embodiment 11
By rich lithium material 0.8Li2MnO3·0.2Li(Co0.15Mn0.6Ni0.2Cu0.05)O2Be assembled into lithiumIon battery.
By described lithium ion battery electrochemistry circulation 12 circles between 2.5-5.0V, activate.
By the electrochemistry circulation between 2.5-4.5V of the battery after activation, use, through 112The circulation of circle, voltage decays to 3.4754 by 3.5101 of the 13rd circle, average every circle decay0.3470mV。
Embodiment 12
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 5 circles between 2.8-5.0V, activate.
By the electrochemistry circulation between 2.0-4.8V of the battery after activation, use. Through 105The circulation of circle, voltage decays to 3.5134V by 3.5875 of the 6th circle, average every circle decay0.7410mV。
Embodiment 13
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 5 circles between 2.8-5.0V, activate.
By the electrochemistry circulation between 2.0-4.9V of the battery after activation, use. Through 105The circulation of circle, voltage decays to 3.5258V by 3.5877 of the 6th circle, average every circle decay0.6190mV。
Embodiment 14
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 5 circles between 2.5-5.2V, activate.
By the electrochemistry circulation between 2.0-5.0V of the battery after activation, use. Through 105The circulation of circle, voltage decays to 3.5250V by 3.5819 of the 6th circle, average every circle decay0.5690mV。
Embodiment 15
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 2 circles between 3.5-4.5V, activate,The starting voltage of activation and blanking voltage are poor is 1V.
By the electrochemistry circulation between 2.0-4.49V of the battery after activation, use. CirculationCharge cutoff voltage and the activation process of process differ 0.01V. Through the circulation of 102 circles, electricityPress by 3.5843 of the 3rd circle and decay to 3.5240V, average every circle decay 0.6030mV
Embodiment 16
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 5 circles between 1.0-5.0V, activate,The starting voltage of activation and blanking voltage are poor is 4V.
By the electrochemistry circulation between 2.0-4.99V of the battery after activation, use. CirculationCharge cutoff voltage and the activation process of process differ 0.01V. Through the circulation of 105 circles, electricityPress by 3.5829 of the 6th circle and decay to 3.5545V, average every circle decay 0.2840mV
Embodiment 17
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 8 circles between 4.0-5.0V, activate,The starting voltage of activation and blanking voltage are poor is 1V.
By the electrochemistry circulation between 2.0-4.0V of the battery after activation, use. Be circulated throughoutCharge cutoff voltage and the activation process of journey differ 1V. Through the circulation of 108 circles, voltage is by3.5855 of 9 circles decay to 3.5365V, average every circle decay 0.4900mV
Embodiment 18
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By described lithium ion battery electrochemistry circulation 10 circles between 1-5.0V, activate,The starting voltage of activation and blanking voltage are poor is 4V.
By the electrochemistry circulation between 2.0-4.0V of the battery after activation, use. Be circulated throughoutCharge cutoff voltage and the activation process of journey differ 1V. Through the circulation of 110 circles, voltage is by3.5683 of 11 circles decay to 3.5305V, average every circle decay 0.3780mV
Comparative example 1
By rich lithium material 0.5Li2MnO3·0.5Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery.
By the electrochemistry circulation between 2.0-4.6V of described lithium ion battery, use.
In comparative example 1, as shown in Figure 3, Fig. 4 is corresponding to the charge and discharge cycles curve of lithium ion batteryAverage voltage curve. With Fig. 1 compare with Fig. 2 known, voltage in comparative example 1 rapidly underFall, electric discharge average voltage decays to the 3.3281V of the 105th circle from the 3.5719V of the 6th circle,Average every circle decay 2.4380mV, this voltage attenuation speed is 5.95 times under 2.0-4.4V.
Comparative example 2
By rich lithium material 0.8Li2MnO3·0.2Li(Mn0.5Ni0.5)O2Be assembled into lithium ion battery.
By the electrochemistry circulation between 2.5-4.8V of described lithium ion battery, use.
The explanation of above embodiment is just for helping to understand method of the present invention and core think of thereofThink. It should be pointed out that for those skilled in the art, do not departing from thisUnder the prerequisite of bright principle, can also carry out some improvement and modification to the present invention, these improve andModify and also fall in the protection domain of the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field can be realizedOr use the present invention. The multiple amendment of these embodiment is come those skilled in the artSay it will will be apparent, General Principle as defined herein can do not depart from of the present inventionIn the situation of spirit or scope, realize in other embodiments. Therefore, the present invention will be not can be byBe limited to these embodiment shown in this article, but will meet and principle disclosed herein and newGrain husk feature the widest consistent scope.
Claims (1)
1. the application process taking lithium-rich manganese-based solid-solution material as anodal battery, comprise withLower step:
By rich lithium material 0.8Li2MnO3·0.2Li(Co0.15Mn0.6Ni0.2Cu0.05)O2Be assembled into lithiumIon battery;
By described lithium ion battery electrochemistry circulation 12 circles between 2.5-5.0V, activate;
By the electrochemistry circulation between 2.5-4.5V of the battery after activation, use;
Or
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery;
By described lithium ion battery electrochemistry circulation 5 circles between 2.8-5.0V, activate;
By the electrochemistry circulation between 2.0-4.8V of the battery after activation, use;
Or
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery;
By described lithium ion battery electrochemistry circulation 5 circles between 2.8-5.0V, activate;
By the electrochemistry circulation between 2.0-4.9V of the battery after activation, use;
Or
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery;
By described lithium ion battery electrochemistry circulation 5 circles between 2.5-5.2V, activate;
By the electrochemistry circulation between 2.0-5.0V of the battery after activation, use;
Or
By rich lithium material 0.3Li2MnO3·0.7Li(Co0.33Mn0.33Ni0.33)O2Be assembled into lithium ionBattery;
By described lithium ion battery electrochemistry circulation 5 circles between 1.0-5.0V, activate,The starting voltage of activation and blanking voltage are poor is 4V;
By the electrochemistry circulation between 2.0-4.99V of the battery after activation, use.
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