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Method for improving cycling stability of lithium ion battery anode material

A lithium-ion battery, cycle stability technology, applied in battery electrodes, secondary battery repair/maintenance, circuits, etc., can solve problems such as failure to achieve commercialization, and achieve the effect of improving cycle stability

Inactive Publication Date: 2013-05-15
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods have improved the cycle stability of lithium-ion battery cathode materials to a certain extent, they have not been commercialized.

Method used

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  • Method for improving cycling stability of lithium ion battery anode material
  • Method for improving cycling stability of lithium ion battery anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 0.067gNaHCO 3 , 0.075gAl(NO 3 ) 3 9H 2 Dissolve O in 10ml of deionized water respectively, disperse 2g of lithium manganate particles in the sodium bicarbonate solution, stir rapidly for 10min, then add the aluminum nitrate solution dropwise into the above suspension under rapid stirring, continue stirring for 30min, and use for precipitation The precursor was obtained by washing with deionized water three times and drying at 80 °C for 5 h. Put the precursor in a muffle furnace, raise the temperature to 300°C at a rate of 3°C / min, keep it in the air for 2h, and cool it down to room temperature naturally to obtain the aluminum oxide-coated lithium manganate cathode material.

Embodiment 2

[0034] Weigh 0.067gNaHCO 3 , 0.075gAl(NO 3 ) 3 9H 2 Dissolve O in 10ml of deionized water respectively, disperse 2g of the prepared manganese lithium silicate particles in the sodium bicarbonate solution, stir rapidly for 10min, then add the aluminum nitrate solution dropwise to the above suspension under rapid stirring, continue After stirring for 30 min, the precipitate was washed three times with deionized water and dried at 80° C. for 5 h to obtain a precursor. The precursor was placed in a muffle furnace, the temperature was raised to 300°C at a rate of 3°C / min, and kept in air for 2h, and then cooled to room temperature naturally to obtain the aluminum oxide-coated lithium manganese silicate cathode material.

Embodiment 3

[0036] Weigh 0.067gNaHCO 3 , 0.075gAl(NO 3 ) 3 9H 2 O were respectively dissolved in 10ml of deionized water, 2g of the prepared nickel-cobalt lithium manganese oxide particles were dispersed in the sodium bicarbonate solution, stirred rapidly for 10min, and then the aluminum nitrate solution was added dropwise to the suspension under rapid stirring, Stirring was continued for 30 min, the precipitate was washed three times with deionized water and dried at 80° C. for 5 h to obtain a precursor. Put the precursor in a muffle furnace, raise the temperature to 300°C at a rate of 3°C / min, and keep it in the air for 2h, and cool it down to room temperature naturally to obtain the alumina-coated nickel-cobalt-lithium-manganese-oxide cathode material.

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Abstract

The invention discloses a method for improving the cycling stability of a lithium ion battery anode material, belonging to the field of lithium ion battery anode materials. The lithium ion battery anode material comprises an anode material and metal oxides uniformly and compactly coated on the surface of the anode material, wherein the anode material comprises lithium manganate, lithium manganous silicate, lithium-nickel-cobalt-manganate and the like, and the metal oxides mainly comprise Al2O3, ZnO, TiO2, Nb2O5, ZrO2, Ta2O5 and the like. Due to the adoption of the metal oxide coating layer, lithium ions can be rapidly and better transmitted, and an electrolyte can be prevented from being in contact with the anode material in a cycling process and further the anode material is prevented from dissolving in the electrolyte, and thus the cycling stability of the anode material is improved. The method has the advantages of simplicity in operation, low cost, high efficiency, and the like; and massive and industrialized production can be easily realized.

Description

technical field [0001] The invention relates to a method for improving the cycle stability of lithium-ion battery cathode materials, belonging to the field of lithium-ion battery cathode materials. technical background [0002] With the continuous progress of society, people have continuously put forward a series of new requirements for chemical power sources such as light weight, small size, high energy, safe use and environmental friendliness. Traditional chemical batteries are far from being able to meet these requirements, so research and development of new chemical power sources with high energy density, long service life, safety and pollution-free has become an urgent requirement. The secondary lithium-ion battery is a new type of high-energy battery with lithium-intercalated compounds as the positive and negative electrode materials. It has a series of advantages such as high specific energy, high voltage, small self-discharge, good cycle performance and long life. Th...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M10/42
CPCY02E60/12Y02E60/10
Inventor 李秋红杨婷王太宏陈立宝朱建李青
Owner HUNAN UNIV
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