CN103985860B - A kind of column lithium ion battery and manufacture method - Google Patents
A kind of column lithium ion battery and manufacture method Download PDFInfo
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- CN103985860B CN103985860B CN201410239177.7A CN201410239177A CN103985860B CN 103985860 B CN103985860 B CN 103985860B CN 201410239177 A CN201410239177 A CN 201410239177A CN 103985860 B CN103985860 B CN 103985860B
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
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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
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
Embodiments providing a kind of column lithium ion battery, described column lithium ion battery includes: positive plate, negative plate, electrolyte, barrier film, metal-back, and wherein said positive pole is by cobalt acid lithium (LiCoO2) material makes, at cobalt acid lithium (LiCoO2) in material, the compound of a certain amount of indium that adulterates. The element indium of the present invention mass fraction in indium-doped cobalt acid lithium is 0.005%��6%. After doped indium element, improve cobalt acid lithium (LiCoO2) electric conductivity of material, thus reducing internal resistance, improve capacity, the capacitance of the column lithium ion battery prepared than tradition can increase by 10%��20% capacity, and the security performance of battery is greatly improved.
Description
Technical field
The present invention relates to a kind of cell art, in particular to a kind of column lithium ion battery and preparation method.
Background technology
Lithium ion battery, owing to having the advantages such as energy density height, good cycle, running voltage height, memory-less effect, becomes one of the most a wide range of secondary cell of application. Lithium battery is made up of main 5 partial component: positive electrode, negative material, barrier film, electrolyte and accessory part. Positive pole is typically chosen relative lithium current potential more than 3V and at the heavily stable lithium intercalation compound of air, such as LiCoO2��LiNiO2��LiMnO2Deng; Negative material then selects current potential as close possible to the embedded lithium compound of lithium current potential, such as lithium--carbon intercalation compound LixC6; Electrolyte mostly is and is dissolved with lithium salts LiPF6��LiAsF6Deng organic solvent; Diaphragm material is generally PP, PE etc.; Accessory part includes shell, cover plate, lug, insulating trip etc.
Lithium ion battery is divided into stacked and takeup type. What column lithium ion battery adopted is coiled manufacturing process, it is mainly characterized in that: the welding position reserving lug in advance on the positive/negative plate of interval coating, winds pole, city group together and then enter shell encapsulation after soldering polar ear after being separated by positive and negative plate with barrier film again.
Column lithium ion battery is generally of the capacity of 2000-2400mAh and being generally mounted at and consumes in the notebook of a large amount of electric energy, digital camera and video camera and portable power tool. Along with the development of technology, various machinery equipments constantly tend to miniaturization, and intelligent, this just requires that its power supply Fabrication of High Specific Capacitance more quantifies. Additionally, the fields such as electric automobile require that motive-power battery must have height ratio capacity, low cost and high security. Traditional cylindrical lithium ion battery generally can not meet such powerful electric discharge requirement.
The performance of lithium ion battery and the performance of battery material are closely related, and therefore the development course of lithium ion battery invariably accompanies the updating and innovation of battery material. All the time, the emphasis of Study on Li-ion batteries is concentrated mainly on positive electrode, negative material and electrolyte aspect. Research shows, the specific capacity of positive electrode often promotes 50%, and the capacity of battery can improve 28%, and the capacity of negative material improves 50%, and the capacity of battery only improves 13%;Positive electrode cost accounts for about the 40% of lithium ion battery totle drilling cost; Therefore, the development that positive electrode is governs price and the chemical property of lithium ion battery. Find high-performance, the positive electrode of low cost is the general trend of current World Battery industry development.
Numerous domestic researcher anode material for lithium-ion batteries modified in done substantial amounts of research. Patent CN200910214418.1 discloses the high-rate cylindrical lithium ion battery of a kind of battery with anode of modified LiMn2O4, adopt the modified lithium manganate of doping nickel, and optimized on battery structure, make the present invention can meet existing electricity consumption product to the powerful electric discharge requirement of battery, the requirement of high security can be reached again; The preparation method that Chinese patent 201110027246.4 discloses a kind of indium-doped manganate cathode material for lithium, the lithium ion battery adopting this positive electrode to prepare, there is better cycle performance, battery storage self discharge reduces, and capacitance loss also reduces accordingly. Although foregoing invention patent all have employed modified or dopant ion mode reaches to change the performance of positive pole, but does not inherently all improve the capacity of lithium ion battery. And for cobalt acid lithium (LiCoO2) to modifiy the research improving its battery capacity be but rare for rarely seen to positive electrode. It is known that cobalt acid lithium (LiCoO2) it is one of positive electrode that lithium ion battery is conventional. LiCoO2The intercalation potential of positive electrode is high, and theoretical capacity reaches 274mAh/g, but in actual cycle process, when the lithium ion having more than half is deviate from, there is serious degeneration in the capacity of material, its layer structure is tended to subside so that actual capacity is less than 150mAh/g.
Therefore, the capacity how promoting the positive electrode of column lithium ion battery has become one of urgent problem highly necessary solved.
Summary of the invention
It is an object of the invention to overcome above-mentioned technical problem, it is provided that a kind of retention of charge is strong, storage capacity is big lithium ion anode material and column lithium ion battery and preparation method.
The technical solution adopted in the present invention is as follows:
On the one hand, embodiments provide a kind of column lithium ion battery, described column lithium ion battery includes: positive plate, negative plate, electrolyte, barrier film, metal-back, it is coiled into column type core according to the sequential volume of barrier film/positive plate/barrier film/negative plate, described core outer wrap cylindrical metal shell, wherein said positive plate includes positive electrode, and described positive electrode is cobalt acid lithium (LiCoO2) material, at cobalt acid lithium (LiCoO2) in material, the compound of doped indium. The element indium of the present invention mass fraction in indium-doped cobalt acid lithium is 0.005%��6%.
Preferred as technique scheme, element indium mass fraction in indium-doped cobalt acid lithium is 0.01%��1.6%.
Preferred as technique scheme, the compound of described indium, include but not limited to Indium sesquioxide. [In2O3], indium hydroxide [In (OH)3], one or two or more kinds mixing in indium phosphide [InP].
On the other hand, embodiments providing a kind of column lithium ion battery manufacture method, described column lithium ion battery manufacture method includes:
Preparation indium-doped lithium cobaltate cathode material;
Prepare positive plate;
Prepare battery cathode sheet and battery assembled formation.
Described positive electrode step of preparing includes:
At cobalt acid lithium (LiCoO2) compound of additional indium in powder;
It is ground batch mixing for medium with ethanol, agate ball, material: ball: ethanol ratio is 1: 2: 1.5 (mass ratio), puts in star ball grinder, after being ground batch mixing 30 minutes, put in microwave oven and dry, namely make indium-doped lithium cobaltate cathode material.
Preferred as technique scheme, element indium mass fraction in indium-doped cobalt acid lithium is 0.005%��6%.
Preferred as technique scheme, the compound of described indium, including Indium sesquioxide. [In2O3], indium chloride [In2Cl3], indium hydroxide [In (OH)3], one or two or more kinds mixing in indium phosphide [InP].
Preferred as technique scheme, the feed postition of the compound of described indium, cobalt acid lithium can be adopted to be stirred mixing with indium compound, it is also possible to preparing cobalt acid lithium (LiCoO2) process in add the compound of indium, present invention preferably employs and prepare cobalt acid lithium (LiCoO2) process in add the compound of indium.
Described positive plate step of preparing includes:
By positive electrode, acetylene carbon black is conductive agent, poly-inclined tetrafluoroethene (PVDF) binding agent, three by mass percentage 94: 3.5: 2.5 ratio make slurry, be coated uniformly on the aluminium foil of 20 �� m-thick and make positive plate.
Described prepare battery cathode sheet and battery assembled formation step includes:
By little for negative electrode active material particle diameter Delanium, acetylene carbon black, gather the ratio mix homogeneously that inclined tetrafluoroethene (PVDF) binding agent is in 94: 3.5: 2.5, add appropriate NMP and mix well into pasty state, be evenly coated on the Copper Foil of 15 �� m-thick and make negative plate. Then adopt the porous barrier film of 20 �� m-thick, be coiled into column type core by the sequential volume of barrier film/positive pole/barrier film/negative pole. Above-mentioned core is put in cylindrical metal shell, injects after laser weld to seal namely to make after electrolyte and add indium cylindrical lithium-ion power battery.
Compared with prior art, it is an advantage of the current invention that: the invention provides a kind of product composition and structure differs markedly from the indium-doped cobalt acid lithium battery of existing cobalt acid lithium product, addition due to phosphide element, improve configuration of surface and the internal structure of cobalt acid lithium, improve the activity of cobalt acid lithium so that modified indium-doped cobalt acid lithium has the specific capacity of better electric conductivity and Geng Gao as anode material for lithium-ion batteries. Additionally, also reduce the internal resistance of lithium ion battery, improve the security performance of circulation volume conservation rate and battery. The compound addition 0.005wt%��6wt% of indium, the experiment gained for the present invention optimizes interval, not mathematics exact value; But addition is too low, improving effect obvious not, addition is too high, can cause again positive pole material of lithium cobalt acid (LiCoO2) activity decrease, performance produces to worsen, and causes capacity of lithium ion battery to reduce.
After doped indium element, improve cobalt acid lithium (LiCoO2) electric conductivity of material, thus reducing internal resistance, capacity is also greatly improved, and the capacitance of the column lithium ion battery prepared than tradition can increase by 10%��20% capacity, and the security performance of battery have also been obtained large increase.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, embodiment of the present invention is described further in detail below.
Embodiment 1
At cobalt acid lithium (LiCoO2) additional 0.0121wt% Indium sesquioxide. in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 0.005%, the dispersant of 0.05wt%, it is ground batch mixing for medium with ethanol, agate ball, material: ball: ethanol ratio is 1: 2: 1.5 (mass ratio), puts in star ball grinder, after being ground batch mixing 30 minutes, put in microwave oven and dry, namely make indium-doped lithium cobaltate cathode material. By positive electrode, acetylene carbon black is conductive agent, poly-inclined tetrafluoroethene (PVDF) binding agent, three by mass percentage 94: 3.5: 2.5 ratio make slurry, be coated uniformly on the aluminium foil of 20 �� m-thick and make positive plate.
By little for negative electrode active material particle diameter Delanium, acetylene carbon black, poly-inclined tetrafluoroethene (PVDF) binding agent in the ratio mix homogeneously of 94: 3.5: 2.5, add appropriate NMP and mix well into pasty state, be evenly coated on the Copper Foil of 15 �� m-thick and make negative pole. Then adopt the porous barrier film of 20 �� m-thick, be coiled into column type core by the sequential volume of barrier film/positive pole/barrier film/negative pole. Above-mentioned core is put in cylindrical metal shell, injects after laser weld to seal namely to make after electrolyte and add indium cylindrical lithium-ion power battery.
Embodiment 2
At cobalt acid lithium (LiCoO2) additional 14.49% Indium sesquioxide. in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 6%, it is ground batch mixing for medium with ethanol, agate ball, material: ball: ethanol ratio is 1: 2: 1.5 (mass ratio), put in star ball grinder, after being ground batch mixing 30 minutes, put in microwave oven and dry, namely make indium-doped lithium cobaltate cathode material.
Prepare positive plate, negative plate and battery assembled formation step with embodiment 1.
Embodiment 3
At cobalt acid lithium (LiCoO2) additional 0.024% Indium sesquioxide. in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 0.01%, it is ground batch mixing for medium with ethanol, agate ball, material: ball: ethanol ratio is 1: 2: 1.5 (mass ratio), put in star ball grinder, after being ground batch mixing 30 minutes, put in microwave oven and dry, namely make indium-doped lithium cobaltate cathode material.
Prepare positive plate, negative plate and battery assembled formation step with embodiment 1.
Embodiment 4
At cobalt acid lithium (LiCoO2) additional 3.86wt% Indium sesquioxide. in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 1.6%, it is ground batch mixing for medium with ethanol, agate ball, material: ball: ethanol ratio is 1: 2: 1.5 (mass ratio), put in star ball grinder, after being ground batch mixing 30 minutes, put in microwave oven and dry, namely make indium-doped lithium cobaltate cathode material.
Prepare positive plate, negative plate and battery assembled formation step with embodiment 1.
Embodiment 5
At cobalt acid lithium (LiCoO2) additional 0.0073wt% indium hydroxide in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 0.005%, it is ground batch mixing for medium with ethanol, agate ball, material: ball: ethanol ratio is 1: 2: 1.5 (mass ratio), put in star ball grinder, after being ground batch mixing 30 minutes, put in microwave oven and dry, namely make indium-doped lithium cobaltate cathode material.
Prepare positive plate, negative plate and battery assembled formation step with embodiment 1.
Embodiment 6
At cobalt acid lithium (LiCoO2) additional 8.73wt% indium hydroxide in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 6%, and preparation method is with embodiment 1.
Embodiment 7
At cobalt acid lithium (LiCoO2) additional 0.015wt% indium hydroxide in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 0.01%, and preparation method is with embodiment 1.
Embodiment 8
At cobalt acid lithium (LiCoO2) additional 2.32wt% indium hydroxide in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 1.6%, and preparation method is with embodiment 1.
Embodiment 9
At cobalt acid lithium (LiCoO2) additional 0.0072wt% indium phosphide in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 0.005%, and preparation method is with embodiment 1.
Embodiment 10
At cobalt acid lithium (LiCoO2) additional 8.7wt% indium phosphide in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 6%, and preparation method is with embodiment 1.
Embodiment 11
At cobalt acid lithium (LiCoO2) additional 0.014wt% indium phosphide in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 0.01%, and preparation method is with embodiment 1.
Embodiment 12
At cobalt acid lithium (LiCoO2) additional 2.32wt% indium phosphide in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 1.6%, and preparation method is with embodiment 1.
In order to embody the outstanding advantage in battery capacity and security performance of the indium-doped cobalt acid lithium ion battery obtained by technical scheme more highlightedly, those skilled in the art adopt again traditional handicraft to be prepared for undoping the cobalt acid lithium (LiCoO of indium2) lithium ion battery is as comparative example 1,2,3.
Comparative example 1
By cobalt acid lithium (LiCoO2): acetylene carbon black conductive agent: poly-inclined tetrafluoroethene (PVDF) binding agent, 94: 3.5: 2.5 ratios make slurry by mass percentage, are coated uniformly on the aluminium foil of 20 �� m-thick and make positive plate. By little for negative electrode active material particle diameter Delanium, acetylene carbon black, poly-inclined tetrafluoroethene (PVDF) binding agent in the ratio mix homogeneously of 94: 3.5: 2.5, add appropriate NMP and mix well into pasty state, be evenly coated on the Copper Foil of 15 �� m-thick and make negative pole. Then adopt the porous barrier film of 20 �� m-thick, be coiled into column type core by the sequential volume of barrier film/positive pole/barrier film/negative pole. Above-mentioned core is put in cylindrical metal shell, seals after injecting electrolyte after laser weld, namely make and add indium cylindrical lithium-ion power battery.
Comparative example 2
By cobalt acid lithium (LiCoO2): acetylene carbon black conductive agent: poly-inclined tetrafluoroethene (PVDF) binding agent, 93: 4: 3 ratios make slurry by mass percentage, are coated uniformly on the aluminium foil of 20 �� m-thick and make positive plate. Other step is with comparative example 1.
Comparative example 3
By cobalt acid lithium (LiCoO2): acetylene carbon black conductive agent: poly-inclined tetrafluoroethene (PVDF) binding agent, 95: 2: 2 ratios make slurry by mass percentage, are coated uniformly on the aluminium foil of 20 �� m-thick and make positive plate. Other step is with comparative example 1.
In order to better embody the technique effect that technical solution of the present invention obtains in battery capacity lifting, those skilled in the art adopt again identical technique, respectively at cobalt acid lithium (LiCoO2) and LiMn2O4 (LiMnO2) in doping 0.12wt% phosphide element, be prepared for the embodiment 13 of the cobalt acid lithium ion battery of indium-doped and the manganate lithium ion battery comparative example 4 of indium-doped.
Embodiment 13
At cobalt acid lithium (LiCoO2) additional 0.29wt% Indium sesquioxide. in powder, now element indium mass fraction in indium-doped cobalt acid lithium is 0.12%, it is ground batch mixing for medium with ethanol, agate ball, material: ball: ethanol ratio is 1: 2: 1.5 (mass ratio), put in star ball grinder, after being ground batch mixing 30 minutes, put in microwave oven and dry, namely make indium-doped lithium cobaltate cathode material.
Prepare positive plate, negative plate and battery assembled formation step with embodiment 1.
Comparative example 4
At LiMn2O4 (LiMnO2) additional 0.29wt% Indium sesquioxide. in powder, now element indium mass fraction in indium-doped LiMn2O4 is 0.12%, it is ground batch mixing for medium with ethanol, agate ball, material: ball: ethanol ratio is 1: 2: 1.5 (mass ratio), put in star ball grinder, after being ground batch mixing 30 minutes, put in microwave oven and dry, namely make indium-doped manganate cathode material for lithium.
Prepare positive plate, negative plate and battery assembled formation step with embodiment 1.
The electrolyte that above-described embodiment battery uses, for the electrolyte of resistance to overshoot.
Battery performance test:
The two kinds of column lithium ion batteries made in aforementioned manners are melted into and post processing, and adopt the AC resistance tester of 1000HZ to measure the internal resistance of battery, be then circulated performance test and security performance test.
The battery performance that table 1 is embodiment of the present invention 1-12 and comparative example 1-3 compares, in table, data show, the battery capacity that the present invention makes is higher than the battery capacity of traditional design by about 20%, and internal resistance only has the traditional design internal resistance of cell about 35%, circulation volume conservation rate is also superior to conventional batteries, and security performance is also above conventional batteries.
Table 1 embodiment of the present invention 1-12 and comparative example 1-3 battery performance comparison sheet
As can be known from the above table: due to the addition of phosphide element, improve configuration of surface and the internal structure of cobalt acid lithium, improve the activity of cobalt acid lithium so that modified indium-doped cobalt acid lithium has the specific capacity of better electric conductivity and Geng Gao as anode material for lithium-ion batteries. Additionally, also reduce the internal resistance of lithium ion battery, improve the security performance of circulation volume conservation rate and battery.
The battery performance that table 2 is the embodiment of the present invention 13 and comparative example 4 compares, in table, data show, the manganate lithium ion battery capacity of the cobalt acid lithium ion battery Capacity Ratio indium-doped of the indium-doped that the present invention makes is also high by about 10%, and internal resistance only has the manganate lithium ion battery internal resistance about 70% of indium-doped, circulation volume conservation rate is suitable, but security performance is also above the manganate lithium ion battery of indium-doped.
Table 2 embodiment of the present invention 13 and comparative example 4 battery performance comparison sheet
Embodiment described above is the one of the present invention more preferably detailed description of the invention, and the usual variations and alternatives that those skilled in the art carries out within the scope of technical solution of the present invention all should be included within protection scope of the present invention.
Claims (5)
1. a column lithium ion battery manufacture method, described column lithium ion battery manufacture method includes:
Preparation indium-doped lithium cobaltate cathode material;
Prepare positive plate;
Prepare battery cathode sheet and battery assembled formation;
It is characterized in that, described preparation indium-doped lithium cobaltate cathode material step includes: the compound of additional indium in cobalt acid lithium powder; It is ground batch mixing for medium with ethanol, agate ball, material: ball: alcohol quality ratio is 1: 2: 1.5, puts in star ball grinder, after being ground batch mixing 30 minutes, put in microwave oven and dry, namely make indium-doped lithium cobaltate cathode material;
Described element indium mass fraction in indium-doped cobalt acid lithium is 0.005%��6%.
2. column lithium ion battery manufacture method according to claim 1, it is characterised in that the compound of described indium, for the one in indium hydroxide, indium phosphide or two kinds of mixing.
3. column lithium ion battery manufacture method according to claim 1, it is characterised in that the feed postition of the compound of described indium, adopts cobalt acid lithium to be stirred mixing with indium compound; Or in the process preparing cobalt acid lithium, add indium compound.
4. column lithium ion battery manufacture method according to claim 1, it is characterised in that prepare positive plate step and include: by positive electrode, acetylene carbon black conductive agent, poly-inclined TFE binder mixing.
5. column lithium ion battery manufacture method according to claim 1, it is characterised in that prepare positive plate step and include: positive electrode, acetylene carbon black, poly-inclined tetrafluoroethene three by mass percentage 94: 3.5: 2.5 ratio make slurry.
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| CN108172825B (en) * | 2017-12-07 | 2020-12-29 | 格林美（江苏）钴业股份有限公司 | High-voltage high-compaction low-cost lithium cobalt oxide positive electrode material and preparation method thereof |
| CN113206237B (en) * | 2021-05-06 | 2022-06-14 | 西安电子科技大学 | Indium-doped high-nickel positive electrode material coated with lithium indium oxide and preparation method thereof |
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| CN101071859A (en) * | 2007-06-07 | 2007-11-14 | 深圳市邦凯电子有限公司 | Lithium cell anode active substance, anode dressing and its preparing method |
| CN102244231A (en) * | 2010-05-14 | 2011-11-16 | 中国科学院物理研究所 | Method for cladding surfaces of active material of anode and/or anode and methods manufacturing anode and battery |
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| CN101071859A (en) * | 2007-06-07 | 2007-11-14 | 深圳市邦凯电子有限公司 | Lithium cell anode active substance, anode dressing and its preparing method |
| CN102244231A (en) * | 2010-05-14 | 2011-11-16 | 中国科学院物理研究所 | Method for cladding surfaces of active material of anode and/or anode and methods manufacturing anode and battery |
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