Modified lithium-cobalt oxide used for positive pole of lithium ion cell, its prepn and lithium ion cell

A lithium cobalt oxide, lithium ion battery technology, applied in lithium compounds, battery electrodes, chemical instruments and methods, etc., can solve the problems of decreased yield, unfavorable charging potential of lithium ion batteries, complicated preparation by hydrothermal oxidation, etc.
CN1492527AInactive Publication Date: 2004-04-28IND TECH RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
IND TECH RES INST
Publication Date
2004-04-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to LiCoO2 of laminated halite alpha=NaFeO2 structure, especially to a modified LiCoO2 When it is used as the positive of a Li ionic battery, its charging potential can be increased to 4.4v. The said modified oxide includes LiCoO2 particles and ZrO2, TiO2, B2O3, Al2O3 or Ga2O3 adhered on the surface of the particles and is prepared by dipping the particles in a solution containing Zr, Ti, B, Al or Ga ions and burring the dipped particles.
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Description

technical field

[0001] The present invention relates to a kind of layered rock salt type (α-NaFeO 2 type) structure lithium cobalt oxide (LiCoO 2 ); especially related to a modified lithium cobalt oxide having a charging potential of about 4.4V when it is used as the positive electrode of a lithium ion battery. Background technique

[0002] Due to their excellent energy density, rechargeable lithium-ion batteries have been widely used as rechargeable energy sources for portable electronic devices such as mobile phones and notebook computers.

[0003] Most of the current lithium-ion batteries use layered rock salt type (α-NaFeO 2 type) structure of LiCoO 2 As the positive electrode, a carbon material such as graphite as the negative electrode, and an organic solution containing Li salt as the electrolyte. The LiCoO 2 It is generally prepared by calcining a mixture containing cobalt oxide and lithium carbonate at 700-900°C. Use this α-NaFeO 2 typ...

Claims

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