Negative electrode for lithium-ion secondary battery, and lithium-ion secondary battery

Abstract

A lithium-ion secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode allows a lithium ion to be inserted into and extracted from the positive electrode. The negative electrode allows the lithium ion to be inserted into and extracted from the negative electrode, and includes a negative electrode active material layer. The electrolytic solution includes an aqueous solvent. The negative electrode active material layer includes negative electrode active material particles and has a porous structure in which the negative electrode active material particles are directly joined to each other. The negative electrode active material particles each include titanium oxide of an anatase type. An average particle size of the negative electrode active material particles is less than or equal to 100 nm.

Dependencies are inferred from the claim text.