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Method for producing cathode active material and method for manufacturing nonaqueous electrolyte cell

A cathode active material, non-aqueous electrolyte technology, applied in non-aqueous electrolyte batteries, electrode manufacturing, final product manufacturing, etc., can solve problems such as battery performance degradation

Inactive Publication Date: 2002-05-22
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, when using manganese oxide or lithium manganese oxide as the cathode active material of a non-aqueous electrolyte secondary battery, battery performance deteriorates undesirably with charge-discharge cycles

Method used

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  • Method for producing cathode active material and method for manufacturing nonaqueous electrolyte cell
  • Method for producing cathode active material and method for manufacturing nonaqueous electrolyte cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Initially, the synthesis replaced LiMn with Cr 2 O 4 The spinel-type lithium manganese oxide substituted with Cr obtained from part of Mn is used as the cathode active material.

[0055] Use an agate mortar to put commercially available manganese dioxide (MnO 2 ) Powder, lithium carbonate (Li 2 CO 3 ) Powder and chromium oxide (Cr 2 O 3 ) The powders are mixed together, and Li, Cr and Mn are mixed in a mixing ratio of 1:0.2:1.8.

[0056] The resulting mixed powder was sintered in an electric furnace under atmospheric pressure to synthesize Cr-substituted spinel lithium manganese oxide. The sintering temperature at this time was set to 800°C. When analyzing the sample obtained by sintering the mixed powder by X-ray diffraction, the spectrum accurately corresponds to the LiMn described in ISDD card 35-782 2 O 4 The data.

[0057] Then, Cr-substituted spinel-type lithium manganese oxide is used as the cathode active material, graphite is used as the conductive material, and po...

Embodiment 2- Embodiment 4， comparative example 1 and comparative example 3

[0061] The coin-shaped battery was manufactured in the same manner as in Example 1, but the sintering temperature of the sintered mixed powder was set to the temperature shown in Table 1 below. Example 5-Example 8, Comparative Example 3 and Comparative Example 4

Embodiment 5- Embodiment 8

[0061] The coin-shaped battery was manufactured in the same manner as in Example 1, but the sintering temperature of the sintered mixed powder was set to the temperature shown in Table 1 below. Example 5-Example 8, Comparative Example 3 and Comparative Example 4

[0062] Initially, LiMn was replaced by Co in the synthesis 2 O4 Co-substituted spinel-type lithium manganese oxide obtained from part of Mn is used as a cathode active material.

[0063] Use an agate mortar to put commercially available manganese dioxide (MnO 2 ) Powder, lithium carbonate (Li 2 CO 3 ) Powder and cobalt oxide (Co 3 O 4 ) The powders are mixed together, and Li, Co and Mn are mixed in a mixing ratio of 1:0.2:1.8.

[0064] The resulting mixed powder was sintered in an electric furnace under atmospheric pressure, thereby synthesizing Co-substituted spinel-type lithium manganese oxide. The sintering temperature at this time was set to the temperature shown in Table 1 below.

[0065] A coin-shaped battery was m...

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PUM

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Abstract

A method for producing a cathode active material which produces a spinel type lithium manganese oxide expressed by a general formula: Li1+xMn2-x-yMeyPO4, as the cathode active material, (here, x is expressed by a relation of 0<=x<=0.15 and y is expressed by a relation of 0 C01D 15 / 02 H01M 4 / 04 1 19 31 2001 / 10 / 23 1350339 2002 / 5 / 22 1189959 2005 / 2 / 16 2005 / 2 / 16 2005 / 2 / 16 Sony Corp. Japan Sakai Hideki Fukuba Shigeshi Takahashi Kimio wang jie 11038 The Patent Agency of the Chinese Council for the Promotion of International Trade (CCPIT) No.1 Waidajie, Fuxingmen, Beijing 100086 Japan 2000 / 10 / 23 323214 / 2000

Description

Invention field [0001] The present invention relates to a method for producing a cathode active material using spinel-type lithium manganese oxide and a method for manufacturing a non-aqueous electrolyte battery using the cathode active material. Background technique [0002] In recent years, with the rapid development of various electronic devices, research on rechargeable secondary batteries as batteries that can be conveniently and economically used for a long time has been actively conducted. As representative secondary batteries, lead-acid storage batteries, alkaline storage batteries, lithium secondary batteries, and the like are known. Among these secondary batteries, especially lithium secondary batteries have advantages in terms of high output and high energy density. [0003] The lithium secondary battery includes a cathode using a cathode active material that undergoes a reversible electrochemical reaction with lithium ions, an anode using an anode active material incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/05C01G37/00C01G45/00C01G49/00C01G51/00C01G53/00H01M4/505H01M4/525
CPCY02E60/122C01G51/54C01G45/1242C01G37/006C01G53/54H01M4/485C01G49/009C01P2002/32C01P2006/40H01M4/525C01P2002/54H01M10/0525H01M4/505Y10T29/49108H01M4/04H01M4/133H01M4/134
Inventor 酒井秀树福屿弦高桥公雄细谷守
Owner SONY CORP
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