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|1. (WO2018179817) NEGATIVE ELECTRODE FOR NON-AQUEOUS SECONDARY BATTERY, AND NON-AQUEOUS SECONDARY BATTERY|
SANYO ELECTRIC CO., LTD.
|Title:||NEGATIVE ELECTRODE FOR NON-AQUEOUS SECONDARY BATTERY, AND NON-AQUEOUS SECONDARY BATTERY|
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.