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Carbon coated nano LiCoO2 material and its preparing method and application

A carbon-coated, nano-structured technology, applied in the field of electrochemistry, can solve problems such as capacity fading, easy structural strain, and poor performance of high-current charging and discharging.

Inactive Publication Date: 2007-06-27
FUDAN UNIV
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Problems solved by technology

The alternative fuel vehicles represented by electric vehicles are the main way for mankind to solve this crisis, which requires our batteries to have high-power energy storage performance, LiCoO 2 It is currently the most promising material of choice for electric vehicle batteries, but its high-current charge and discharge performance is not good, and it is prone to structural strains that lead to capacity attenuation

Method used

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  • Carbon coated nano LiCoO2 material and its preparing method and application
  • Carbon coated nano LiCoO2 material and its preparing method and application
  • Carbon coated nano LiCoO2 material and its preparing method and application

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Embodiment Construction

[0015] In the carbon-coated LiCoO of the present invention 2 In the preparation process, the raw material cobalt salt used in step (1) includes acetate, nitrate, oxalate and other cobalt salts that are easy to decompose and generate gas when heated, and lithium salts include lithium carbonate, lithium hydroxide, lithium nitrate, etc. Lithium salt that generates gas in salt reaction. The organic carrier is an organic compound containing polar carboxyl or hydroxyl groups, including citric acid, tartaric acid, acrylic acid, etc. The concentration range of raw materials is 0.01-10 mol / l, preferably 0.1-0.5 mol / l, and the temperature during heating and stirring is 40-80°C, preferably 70-80°C.

[0016] In the carbon-coated LiCoO of the present invention 2 During the preparation process, the gel in step (1) needs to be further dried and ground before being calcined, so that the contact area with the air is larger during calcining, and the calcining is more complete. The calcination...

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Abstract

The present invention belongs to the field of electrochemical technology, and is especially carbon coated nanometer LiCoO2 material and its emulsion polymerization preparation process and application. The carbon coated nanometer LiCoO2 material has homogeneous grains and 3 magnitude orders raised lithium ion diffusion coefficient. The process of the present invention has high operability, high repeatability and capacity of obtaining stable quality product.

Description

technical field [0001] The invention belongs to the field of electrochemical technology, in particular to a carbon-coated nano-LiCoO 2 Material and preparation method thereof, more precisely, the present invention relates to a kind of LiCoO with nanostructure prepared by sol-gel method 2 , and then prepared carbon-coated LiCoO by emulsion polymerization 2 Methods. The present invention also relates to carbon-coated LiCoO obtainable by the process described above 2 and its application. Background technique [0002] As we all know, lithium cobalt oxide LiCoO 2 It is a cathode material widely used in the production of lithium-ion batteries at present. It has the advantages of simple preparation process, high charge and discharge capacity, and long service life. It is the earliest industrialized lithium-ion cathode material. [0003] LiCoO 2 There are generally two structures: layered and spinel structures, but the spinel structure is unstable and the cycle performance is ...

Claims

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Application Information

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IPC IPC(8): C01G51/00C01D13/00C04B35/628H01M4/58H01M4/525
CPCY02E60/12Y02E60/10
Inventor 曹千杨黎春夏琴吴宇平
Owner FUDAN UNIV
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