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Positive electrode active material, method for manufacturing positive electrode active material and nonaqueous electrolyte battery

A technology of positive active materials and compounds, applied in the field of non-aqueous electrolyte batteries, can solve problems such as breakdown and damage to batteries, and achieve the effect of inhibiting decomposition and inhibiting gas generation

Inactive Publication Date: 2013-11-20
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there arises a problem that an internal short circuit occurs, thereby causing thermal breakdown, thereby destroying the battery

Method used

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  • Positive electrode active material, method for manufacturing positive electrode active material and nonaqueous electrolyte battery
  • Positive electrode active material, method for manufacturing positive electrode active material and nonaqueous electrolyte battery
  • Positive electrode active material, method for manufacturing positive electrode active material and nonaqueous electrolyte battery

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no. 1 approach

[0025] 1. First Embodiment (Positive Electrode Active Material)

[0026] 2. Second Embodiment (Method for Manufacturing Positive Electrode Active Material)

no. 3 approach

[0027] 3. Third Embodiment (First Example of Nonaqueous Electrolyte Battery)

no. 4 approach

[0028] 4. Fourth Embodiment (Second Example of Nonaqueous Electrolyte Battery)

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Abstract

A positive electrode active material includes a lithium complex oxide particle, and a coating layer formed on at least a part of the surface of the lithium complex oxide particle. The lithium complex oxide particle is a lithium complex oxide particle composed mainly of nickel. The coating layer contains an oxo acid and / or an oxo acid compound, an acidity of the surface of the lithium complex oxide particle composed mainly of nickel is increased by the coating layer. The acidity is determined based on a pH of a supernatant of water in a state where after 1.0 part by weight of the lithium complex oxide particle composed mainly of nickel and having a coating layer formed thereon is dispersed in 50 parts by weight of water. The lithium complex oxide particle sediments, and the pH is less than 8.0.

Description

[0001] References to related applications [0002] This application contains subject matter related to that disclosed in Japanese Priority Patent Applications JP 2009-103791 and JP 2009-144363 filed in the Japan Patent Office on April 22, 2009 and June 17, 2009, respectively, the entire contents of which are incorporated herein by reference. technical field [0003] The invention relates to a positive electrode active material, a method for manufacturing the positive electrode active material and a nonaqueous electrolyte battery. Background technique [0004] In recent years, with the popularization of portable devices such as video cameras and laptop personal computers, demands for small and high-capacity secondary batteries have increased. Secondary batteries currently in use include nickel-cadmium batteries and nickel-metal hydride batteries, both of which use alkaline electrolytes. However, the voltage of such a battery is very low, such as about 1.2V, so it is difficu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/04H01M10/05
CPCH01M4/505Y02E60/122H01M4/525H01M4/587H01M4/02H01M4/131H01M10/0525H01M4/366H01M4/485H01M4/1391Y02E60/10
Inventor 渡边春夫大山有代细谷洋介藤田茂
Owner SONY CORP
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