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1. (WO2018179817) NEGATIVE ELECTRODE FOR NON-AQUEOUS SECONDARY BATTERY, AND NON-AQUEOUS SECONDARY BATTERY

Pub. No.:    WO/2018/179817    International Application No.:    PCT/JP2018/003375
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Feb 02 00:59:59 CET 2018
IPC: H01M 4/133
H01M 4/13
H01M 4/36
H01M 4/48
H01M 4/587
H01M 4/62
Applicants: PANASONIC CORPORATION
パナソニック株式会社
SANYO ELECTRIC CO., LTD.
三洋電機株式会社
Inventors: ITO Daisuke
伊藤 大介
MATSUO Yuta
松尾 雄太
ISHIKAWA Kaori
石川 香織
Title: NEGATIVE ELECTRODE FOR NON-AQUEOUS SECONDARY BATTERY, AND NON-AQUEOUS SECONDARY BATTERY
Abstract:
Provided is a negative electrode having a negative electrode current collector and a negative electrode composite layer formed on the current collector, wherein the negative electrode composite layer has a carbon material and an Si-containing compound as negative electrode active materials. The negative electrode composite layer is composed of an underlayer (first layer) formed on the negative electrode current collector, and an upper layer (second layer) formed on the underlayer. The underlayer contains a carbon material, an Si-containing compound, and a first binder containing polyacrylic acid or a salt thereof. The upper layer contains a carbon material and a second binder. The underlayer constitutes at least 50% and less than 90% of the negative electrode composite layer by mass, and the upper layer constitutes more than 10% and at most 50% of the negative electrode composite layer by mass.