| abstract |
The present invention provides a non-aqueous electrolyte secondary battery negative electrode and a non-aqueous electrolyte secondary battery with excellent cycle life, the non-aqueous electrolyte secondary battery negative electrode is a water-based formulation with less environmental load, and is a simple formulation, and It can be manufactured by a process that does not require a thermosetting treatment or the like. A non-aqueous electrolyte secondary battery negative electrode comprising a current collector and a negative electrode active material layer formed on the current collector, the non-aqueous electrolyte secondary battery negative electrode is characterized in that: the negative electrode active material layer contains a carbon-based negative electrode active material Substance, silicon-based negative electrode active material, conductive agent, and predetermined carboxymethyl cellulose or its salt, the content of carboxymethyl cellulose or its salt is 4% by mass or more relative to the total mass of the negative electrode active material layer and 15 mass % or less, the content of the silicon-based negative electrode active material is 3 mass % or more and 19 mass % or less with respect to the total content of the carbon-based negative electrode active material and the silicon-based negative electrode active material. |