| abstract |
PROBLEM TO BE SOLVED: To improve electrolyte permeability and electrolyte retention, which are problems in realizing a high-density electrode necessary for achieving a high energy density battery. A high-density electrode formed by impregnating a polymer solid electrolyte into a high-density electrode containing an electrode active material and carbon fibers having a fiber diameter of 1 to 1000 nm and having a porosity of 25% or less, and the electrode The battery used. [Selection figure] None |