CN103647115A - Application method of battery utilizing lithium-rich manganese-based solid solution material as positive electrode - Google Patents
Application method of battery utilizing lithium-rich manganese-based solid solution material as positive electrode Download PDFInfo
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- CN103647115A CN103647115A CN201310700289.3A CN201310700289A CN103647115A CN 103647115 A CN103647115 A CN 103647115A CN 201310700289 A CN201310700289 A CN 201310700289A CN 103647115 A CN103647115 A CN 103647115A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides an application method of a battery utilizing a lithium-rich manganese-based solid solution material as a positive electrode. The method comprises the following steps: performing electrochemical charging and discharging activation treatment on the battery utilizing the lithium-rich manganese-based solid solution material as the positive electrode; performing charging and discharging circulation on the activated battery, wherein the cut-off voltage of the battery subjected to charging and discharging circulation is less than the charge cut-off voltage during the activation treatment. According to the method provided by the invention, the lithium-rich manganese-based solid solution material releases full capacity by virtue of activating, a layer structure is transformed into a spinel structure quickly, and then the battery can be subjected to charging and discharging circulation in a mild condition, and the material still has higher capacity under a lower charging cut-off voltage. Meanwhile, in the mild condition, the un-removed lithium ion plays a role in supporting the structure, so that the lithium-rich manganese-based solid solution material keeps a stable structure in the process of electrochemical cycling, without obvious voltage falling, and thus voltage attenuation is restrained effectively.
Description
Technical field
The present invention relates to lithium ion battery field, particularly take the application process of lithium-rich manganese-based solid-solution material as 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.Lithium ion battery has been monopolized mobile phone and notebook computer market at present, and the application at military and aerospace field simultaneously increases gradually, and its figures of field such as military communication, torpedo, submarine, guided missile, flying apsaras, lunar exploration are also seen everywhere.At field lithium ion batteries such as electric tool, electric automobile (EV/PHEV/HEV), energy storage, become the most competitive candidate products, electric automobile and energy storage become the following maximum potential market of lithium ion battery.
Lithium ion battery is comprised of positive pole, negative pole, electrolyte and barrier film.Wherein, positive electrode is the key factor of the aspects such as the voltage that determines lithium ion battery, capacity, fail safe, cycle performance.Lithium iron phosphate dynamic battery energy density is only 90Wh/kg left and right at present, and LiMn2O4 electrokinetic cell is about 140Wh/kg.And as lithium-ion-power cell electrode material of future generation, the lithium-rich manganese-based anode material of height ratio capacity becomes the focus of positive electrode research, be expected to make the energy density of dynamic lithium battery to break through 250Wh/kg.
Lithium-rich manganese-based solid solution cathode material can be used general formula xLi[Li
1/3mn
2/3] O
2(1 – x) LiMO
2express, wherein M is transition metal, has very high specific discharge capacity, is 2 times of left and right of current positive electrode actual capacity used; Owing to having used a large amount of Mn elements in material, this material not only price is low, and fail safe is good, environmentally friendly.Therefore, xLi[Li
1/3mn
2/3] O
2(1 – x) LiMO
2material is considered as the choosing of the ideal of anode material for lithium-ion batteries of future generation by numerous scholars.Research thinks that lithium-rich manganese-based solid solution cathode material is Li
2mnO
3metallizing thing LiMO
2the continuous solid solution of (M is transition metal), its molecular formula can be written as xLi
2mnO
3(1-x) LiMO
2, still lithium-rich manganese-based solid-solution material is changed in quality for xMnO after initial charge finishes to deviate from Li
2(1-x) MO
2, layer structure is unstable, and transition metal ions is to the migration of lithium layer, and structure changes to spinelle, and the plateau potential of resulting stratiform-spinelle mixed structure reduces, and forms voltage attenuation progressively.The harm of voltage attenuation maximum is the situation of voltage, capacity in accurate monitoring battery system, makes lithium ion battery consistency problem, and safety issue is more outstanding, has seriously restricted it and has focused on the application in the battery of fail safe at electrokinetic cell etc.On the other hand, according to output electric energy W=UIt, the energy density that after voltage drop, battery 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 are launched, but are not solved preferably all the time.The people such as Chongmin Wang (Formation of the Spinel Phase in the Layered Composite Cathode Used in Li-Ion Batteries.ACS nano, 2013,760-767.) studied Li
1.2ni
0.2mn
0.6o
2the structural change of material in cyclic process, utilizes AlF
3after coated, can only be by the process backward delay of voltage attenuation tens of circles, but can not stop this process.The people such as Lian Fang (Synthesis and electrochemical performance of long lifespan Li-rich Li
1+x(Ni
0.37mn
0.63) 1-
xo
2cathode materials for lithium-ion batteries.Electrochimica Acta95 (2013) 87 – 94.) synthesized the Li of different lithium content
1+x(Ni
0.37mn
0.63) 1-
xo
2sample (x=0.123,0.111,0.086,0.070,0.031), studies the impact of different rich lithium amounts on voltage attenuation in circulation.Find, when x=0.086-0.123, to there is the highest middle threshold voltage.From first circle to the 100 circles, middle threshold voltage decays to 3.5V from 3.75V, and average every circle decay 2.5mV, remains the very fast rate of decay.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of application process that lithium-rich manganese-based solid-solution material is anodal battery of take, and can effectively suppress voltage attenuation.The negative pole of battery described in the present invention is selected lithium metal, if adopt other negative poles (as graphite, MCMB, silicon carbon material), need with respect to the potential difference of lithium metal, carry out according to other negative poles the accommodation of charge and discharge system.
The invention discloses a kind of application process that lithium-rich manganese-based solid-solution material is anodal battery of take, comprise the following steps:
(A) to take lithium-rich manganese-based solid-solution material, carry out charge discharge activation processing as anodal battery; (B) battery after described activation is carried out to charge and discharge cycles use;
Described step (B) is carried out the charge cutoff voltage of the charge cutoff voltage of charge and discharge cycles while using when being less than step (A) and carrying out charge discharge activation processing.
Application process according to claim 1, is characterized in that, in described step (A), 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, and starting voltage is for being greater than 0V.
Preferably, in described step (A), the charge cutoff voltage of described activation processing is 4.5～5.0V; 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.
The voltage difference of charge cutoff voltage when charge cutoff voltage when preferably, described step (B) is carried out charge and discharge cycles use and step (A) are carried out charge discharge activation processing is 0.01～1V.
Preferably, in described step (A), the charge cutoff voltage of described activation processing and the voltage difference between starting voltage are 1～4V.
Compared with prior art, the application process that lithium-rich manganese-based solid-solution material is anodal battery is take in the present invention, comprises the following steps: to take lithium-rich manganese-based solid-solution material, carry out charge discharge activation processing as anodal battery; Battery after described activation is carried out to charge and discharge cycles use; The charge cutoff voltage when cut-ff voltage of the latter's circulation time is less than activation processing.The present invention is first by 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 spinel structure, to transform rapidly, then by controlling battery, under temperate condition, carry out charge and discharge cycles, make lithium-rich manganese-based solid-solution material under lower charge cutoff voltage, still there is higher capacity.Simultaneously, under gentle condition, because lithium ion does not remove completely, remain in the effect that part lithium ion in lithium-rich manganese-based solid-solution material plays supporting construction, make lithium-rich manganese-based solid-solution material in electrochemistry cyclic process, keep stable, no longer include obvious voltage drop, thereby effectively suppressed voltage attenuation.And the method is simple and practical, application is convenient.
Accompanying drawing explanation
Fig. 1 is the front 105 circle charging and discharging curves that in embodiment 1, rich lithium material encloses and recycles at 2.0～4.4V in 2.0～4.6V activation 5;
Fig. 2 is the electric discharge average voltage curves of front 105 circles that in embodiment 1, rich lithium material encloses and recycles at 2.0～4.4V in 2.0～4.6V activation 5;
Fig. 3 is the front 105 circle charging and discharging curves that in comparative example 1, rich lithium material recycles at 2.0～4.6V;
Fig. 4 is the front 105 circle electric discharge average voltage curves that in comparative example 1, rich lithium material recycles at 2.0～4.6V.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, rather than limiting to the claimed invention.
The embodiment of the invention discloses a kind of application process that lithium-rich manganese-based solid-solution material is anodal battery of take, comprise the following steps:
(A) to take lithium-rich manganese-based solid-solution material, carry out charge discharge activation processing as anodal battery;
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;
Described step (B) is carried out the charge cutoff voltage of the charge cutoff voltage of charge and discharge cycles while using when being less than step (A) and carrying out charge discharge activation processing.
The present invention be take lithium-rich manganese-based solid-solution material as anodal battery be object, the present invention be take lithium-rich manganese-based solid-solution material and is not particularly limited as anodal battery for described, commercially available prod.Rich lithium material xLi to any composition
2mnO
3(1 – x) LiM (M ") O
2all applicable, 0<x<1 wherein, M is transition metal, can be one or more in nickel, cobalt, manganese, iron, boron, aluminium, vanadium; M " is doped chemical, comprises titanium, chromium, copper, zinc, zirconium, niobium, molybdenum.
In the present invention, first to take lithium-rich manganese-based solid-solution material, carry out charge discharge activation processing as anodal battery.The charge cutoff voltage of described activation processing is preferably greater than 4.4V, and the charge cutoff voltage of described activation processing is preferably 4.5～5.0V.The described number of turns discharging and recharging, for being not less than 1 circle, is preferably 2～10 circles, more preferably 2～5 circles.The starting voltage of described activation processing is for being greater than 0V, and described starting voltage is preferably 2.0～2.8V.The charge cutoff voltage of described activation processing and the voltage difference between starting voltage are preferably 1～4V, more preferably 2.0～3.0V.By 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 spinel structure, to transform rapidly.
After activation, the battery after described activation, under lower charge cutoff voltage condition, is carried out to charge and discharge cycles use.Described charge cutoff voltage is preferably 4.4～5.0V, more preferably 4.4～4.6V.Described step (B) is carried out the charge cutoff voltage of the charge cutoff voltage of charge and discharge cycles while using when being less than step (A) and carrying out charge discharge activation processing.The voltage difference of charge cutoff voltage when charge cutoff voltage when described step (B) is carried out charge and discharge cycles use and step (A) are carried out charge discharge activation processing is preferably 0.01～1V, more preferably 0.1～0.5V.Lithium-rich manganese-based solid-solution material after overactivation, in stable state, carries out charge and discharge cycles by controlling battery under temperate condition, and described lithium-rich manganese-based solid-solution material still has higher capacity under lower charge cutoff voltage.Simultaneously, under gentle condition, because lithium ion does not remove completely, remain in the effect that part lithium ion in lithium-rich manganese-based solid-solution material plays supporting construction, make lithium-rich manganese-based solid-solution material in electrochemistry cyclic process, keep stable, no longer include obvious voltage drop, thereby effectively suppressed voltage attenuation.
In order further to understand the present invention, below in conjunction with embodiment, to provided by the invention, take the application process that lithium-rich manganese-based solid-solution material is anodal battery and describe, protection scope of the present invention is not limited by the following examples.In each embodiment, with described lithium-rich manganese-based anode material, electrolyte and lithium sheet negative pole, according to method well known in the art, assemble, can obtain lithium ion battery.
Embodiment 1
By rich lithium material 0.5Li
2mnO
30.5Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
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 is 25 ℃, and charging and discharging currents is 50mA/g, obtains charge and discharge cycles curve as shown in Figure 1, and Fig. 2 is corresponding average voltage curve.As shown in Figure 1, the battery that embodiment 1 is assembled by lithium-rich manganese-based anode material is after the 2.0-4.6V activation of 5 circles, and the discharge capacity of the 6th circle in 2.0-4.4V discharges and recharges scope 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.Electric discharge average voltage decays to the 3.4883V of the 105th circle from the 3.5293V of the 6th circle, average every circle decay 0.4100mV.
Embodiment 2
By rich lithium material 0.3Li
2mnO
30.7Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
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 capacity of the 6th circle reaches 260.1mAh/g, and the 105th circle Capacitance reserve is at 246.7mAh/g.Through the circulation of 105 circles, voltage decays to 3.5245V by 3.5823 of the 6th circle, average every circle decay 0.5780mV.
Embodiment 3
By rich lithium material 0.5Li
2mnO
30.5Li (Co
0.2mn
0.3ni
0.5) O
2be assembled into lithium ion battery.
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 the circulation of 105 circles, voltage decays to 3.5124V by the 3.5166V of the 6th circle, average every circle decay 0.0420mV.
Embodiment 4
By rich lithium material 0.6Li
2mnO
30.4Li (Co
0.2mn
0.3ni
0.5) O
2be assembled into lithium ion battery.
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 the circulation of 105 circles, voltage decays to 3.5124V by the 3.5764V of the 6th circle, average every circle decay 0.6400mV.
Embodiment 5
By rich lithium material 0.2Li
2mnO
30.8Li (Mn
0.5ni
0.48cu
0.02) O
2be assembled into lithium ion battery.
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 the circulation of 103 circles, voltage decays to 3.5102V by the 3.5685V of the 4th circle, average every circle decay 0.5830mV.
Embodiment 6
By rich lithium material 0.5Li
2mnO
30.5Li (Mn
0.5ni
0.5) O
2be 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 the circulation of 103 circles, voltage decays to 3.5096V by the 3.5478V of the 4th circle, average every circle decay 0.3820mV.
Embodiment 7
By rich lithium material 0.4Li
2mnO
30.6Li (Co
0.3mn
0.2ni
0.46zn
0.04) O
2be assembled into lithium ion 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 the circulation of 102 circles, voltage decays to 3.4843V by the 3.5274V of the 3rd circle, average every circle decay 0.4310mV.
Embodiment 8
By rich lithium material 0.8Li
2mnO
30.2Li (Co
0.95fe
0.04nb
0.01) O
2be assembled into lithium ion battery.
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 the circulation of 101 circles, voltage decays to 3.4826V by the 3.5348V of the 2nd circle, average every circle decay 0.5220mV.
Embodiment 9
By rich lithium material 0.1Li
2mnO
30.8Li (Co
0.1mn
0.1ni
0.8) O
2be assembled into lithium ion battery.
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 the circulation of 101 circles, voltage decays to 3.4887V by the 3.5305V of the 2nd circle, average every circle decay 0.4180mV.
Embodiment 10
By rich lithium material 0.5Li
2mnO
30.5Li (Co
0.33mn
0.34ni
0.3b
0.03) O
2be assembled into lithium ion 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, through the circulation of 106 circles, voltage decays to 3.4782 by the 3.5105V of the 7th circle, average every circle decay 0.3230mV.
Embodiment 11
By rich lithium material 0.8Li
2mnO
30.2Li (Co
0.15mn
0.6ni
0.2cu
0.05) O
2be assembled into lithium ion 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 the circulation of 112 circles, voltage decays to 3.4754 by 3.5101 of the 13rd circle, average every circle decay 0.3470mV.
Embodiment 12
By rich lithium material 0.3Li
2mnO
30.7Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
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 the circulation of 105 circles, voltage decays to 3.5134V by 3.5875 of the 6th circle, average every circle decay 0.7410mV.
Embodiment 13
By rich lithium material 0.3Li
2mnO
30.7Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
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 the circulation of 105 circles, voltage decays to 3.5258V by 3.5877 of the 6th circle, average every circle decay 0.6190mV.
Embodiment 14
By rich lithium material 0.3Li
2mnO
30.7Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
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 the circulation of 105 circles, voltage decays to 3.5250V by 3.5819 of the 6th circle, average every circle decay 0.5690mV.
Embodiment 15
By rich lithium material 0.3Li
2mnO
30.7Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
By described lithium ion battery electrochemistry circulation 2 circles between 3.5-4.5V, activate, the starting voltage of activation and cut-ff voltage are poor is 1V.
By the electrochemistry circulation between 2.0-4.49V of the battery after activation, use.Charge cutoff voltage and the activation process of cyclic process differ 0.01V.Through the circulation of 102 circles, voltage decays to 3.5240V by 3.5843 of the 3rd circle, average every circle decay 0.6030mV
Embodiment 16
By rich lithium material 0.3Li
2mnO
30.7Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
By described lithium ion battery electrochemistry circulation 5 circles between 1.0-5.0V, activate, the starting voltage of activation and cut-ff voltage are poor is 4V.
By the electrochemistry circulation between 2.0-4.99V of the battery after activation, use.Charge cutoff voltage and the activation process of cyclic process differ 0.01V.Through the circulation of 105 circles, voltage decays to 3.5545V by 3.5829 of the 6th circle, average every circle decay 0.2840mV
Embodiment 17
By rich lithium material 0.3Li
2mnO
30.7Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
By described lithium ion battery electrochemistry circulation 8 circles between 4.0-5.0V, activate, the starting voltage of activation and cut-ff voltage are poor is 1V.
By the electrochemistry circulation between 2.0-4.0V of the battery after activation, use.Charge cutoff voltage and the activation process of cyclic process differ 1V.Through the circulation of 108 circles, voltage decays to 3.5365V by 3.5855 of the 9th circle, average every circle decay 0.4900mV
Embodiment 18
By rich lithium material 0.3Li
2mnO
30.7Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
By described lithium ion battery electrochemistry circulation 10 circles between 1-5.0V, activate, the starting voltage of activation and cut-ff voltage are poor is 4V.
By the electrochemistry circulation between 2.0-4.0V of the battery after activation, use.Charge cutoff voltage and the activation process of cyclic process differ 1V.Through the circulation of 110 circles, voltage decays to 3.5305V by 3.5683 of 11th round, average every circle decay 0.3780mV
Comparative example 1
By rich lithium material 0.5Li
2mnO
30.5Li (Co
0.33mn
0.33ni
0.33) O
2be assembled into lithium ion battery.
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 average voltage curve to the charge and discharge cycles curve of lithium ion battery.Compare knownly with Fig. 2 with Fig. 1, the voltage in comparative example 1 declines rapidly, and 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, and this voltage attenuation speed is 5.95 times under 2.0-4.4V.
Comparative example 2
By rich lithium material 0.8Li
2mnO
30.2Li (Mn
0.5ni
0.5) O
2be 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 concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection range of the claims in the present invention.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. the application process that the lithium-rich manganese-based solid-solution material of take is anodal battery, comprises the following steps:
(A) to take lithium-rich manganese-based solid-solution material, carry out charge discharge activation processing as anodal battery;
(B) battery after described activation is carried out to charge and discharge cycles use;
Described step (B) is carried out the charge cutoff voltage of the charge cutoff voltage of charge and discharge cycles while using when being less than step (A) and carrying out charge discharge activation processing.
2. application process according to claim 1, is characterized in that, in described step (A), the charge cutoff voltage of described activation processing is greater than 4.4V.
3. application process according to claim 1, is characterized in that, in described step (A), the number of turns of described activation processing is for being not less than 1 circle, and starting voltage is for being greater than 0V.
4. application process according to claim 2, is characterized in that, in described step (A), the charge cutoff voltage of described activation processing is 4.5～5.0V; The described number of turns discharging and recharging is 2～10 circles, and starting voltage is 2.0～2.8V.
5. application process according to claim 1, is characterized in that, in described step (A), the charge cutoff voltage of described activation processing and the voltage difference between starting voltage are 1～4V.
6. application process according to claim 1, is characterized in that, in described step (B), described charge cutoff voltage is 4.4～5.0V.
7. application process according to claim 1, is characterized in that, the voltage difference of charge cutoff voltage when charge cutoff voltage when described step (B) is carried out charge and discharge cycles use and step (A) are carried out charge discharge activation processing is 0.01～1V.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319422A (en) * | 2014-10-10 | 2015-01-28 | 奇瑞汽车股份有限公司 | Method for improving cycling stability of lithium-manganese lithium ion battery |
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| CN114512733A (en) * | 2022-01-21 | 2022-05-17 | 厦门大学 | Method for improving electrochemical performance of lithium-sulfur battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3023070A1 (en) * | 2014-06-27 | 2016-01-01 | Renault Sas | LITHIUM ION BATTERY CYCLING PROCESS COMPRISING SURGRAIN OXIDE BASED CATHODE MATERIAL |
| CN104319422A (en) * | 2014-10-10 | 2015-01-28 | 奇瑞汽车股份有限公司 | Method for improving cycling stability of lithium-manganese lithium ion battery |
| CN104319422B (en) * | 2014-10-10 | 2017-01-18 | 奇瑞汽车股份有限公司 | Method for improving cycling stability of lithium-manganese lithium ion battery |
| CN106898834A (en) * | 2017-04-20 | 2017-06-27 | 北京工业大学 | A kind of method for improving lithium-rich manganese-based layered oxide cyclical stability |
| CN107221656A (en) * | 2017-06-07 | 2017-09-29 | 北京当升材料科技股份有限公司 | A kind of lithium ion battery rich lithium manganese base solid solution positive electrode and preparation method thereof |
| CN107959071A (en) * | 2017-11-15 | 2018-04-24 | 国联汽车动力电池研究院有限责任公司 | A kind of lithium ion battery and its chemical synthesizing method |
| WO2019095530A1 (en) * | 2017-11-20 | 2019-05-23 | 中国科学院宁波材料技术与工程研究所 | Lithium-rich oxide positive electrode material, preparation method therefor, and lithium ion battery |
| CN114512733A (en) * | 2022-01-21 | 2022-05-17 | 厦门大学 | Method for improving electrochemical performance of lithium-sulfur battery |
| CN114512733B (en) * | 2022-01-21 | 2024-02-27 | 厦门大学 | Method for improving electrochemical performance of lithium-sulfur battery |
| WO2023170023A1 (en) | 2022-03-08 | 2023-09-14 | Fundación Centro De Investigación Cooperativa De Energías Alternativas Cic Energigune Fundazioa | Electrode material |
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