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Negative electrode active material, negative electrode, battery, battery pack, electronic device, electric vehicle, power storage device, and power system

A technology of negative electrode active material and battery, applied in the direction of active material electrode, battery electrode, non-aqueous electrolyte storage battery, etc., can solve the problems of loss of ionic conductivity, depletion of electrolyte, loss of conductivity, etc., and achieve the effect of improving cycle characteristics

Pending Publication Date: 2019-08-13
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the most important thing in the battery is the reactivity with the electrolyte, and the accumulation of electrolyte decomposition products (SEI: Solid Electrolyte Interface, solid electrolyte interface film) leads to loss of electrical conductivity, loss of ionic conductivity, depletion of the electrolyte, and gas generation. adverse effects

Method used

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  • Negative electrode active material, negative electrode, battery, battery pack, electronic device, electric vehicle, power storage device, and power system
  • Negative electrode active material, negative electrode, battery, battery pack, electronic device, electric vehicle, power storage device, and power system
  • Negative electrode active material, negative electrode, battery, battery pack, electronic device, electric vehicle, power storage device, and power system

Examples

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Effect test

no. 1 approach

[0035] 1 First Embodiment (Example of Negative Electrode Active Material)

no. 2 approach

[0036] 2 Second Embodiment (Example of Cylindrical Battery)

no. 3 approach

[0037] 3 Third Embodiment (Example of Laminated Film Type Battery)

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Abstract

A negative electrode active material, provided with: a core part containing silicon, tin, and / or germanium; and a coating part for coating at least a part of the surface of the core part. The coatingpart contains a phosphoric acid-containing compound.

Description

technical field [0001] The present invention relates to a negative electrode active material, a negative electrode, a battery, a battery pack, electronic equipment, an electric vehicle, an electrical storage device, and an electric power system. Background technique [0002] In recent years, demands for higher battery capacity, higher cycle characteristics, and higher load characteristics have increased, and various active material materials have been developed. However, the most important thing in the battery is the reactivity with the electrolyte, and the accumulation of electrolyte decomposition products (SEI: Solid Electrolyte Interface, solid electrolyte interface film) leads to loss of electrical conductivity, loss of ionic conductivity, depletion of the electrolyte, and gas generation. adverse effects. [0003] Patent Document 1 proposes a technique of covering at least a part of the surface of lithium-titanium composite oxide particles with at least one element sele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/36H01M4/48H01M10/052H01M10/0567
CPCH01M4/38H01M10/052H01M10/0567H01M4/386H01M4/366H01M4/387H01M4/134Y02E60/10H01M10/0525H01M2004/027H01M2300/0025
Inventor 伊藤大辅佐藤晋香取健二
Owner MURATA MFG CO LTD
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