A power storage element comprises a negative electrode that includes a first conductor having a first surface and a second surface opposite to the first surface; a first active material layer provided on the first surface of the first conductor and configu...

A cured product for lithium ion secondary batteries includes water-soluble polymers, a crosslinking agent and cellulose nanofibers. The crosslinking agent crosslinks different water-soluble polymers or the water-soluble polymer and the cellulose nanofibers...

An all-solid-state battery includes a positive electrode layer, a solid electrolyte layer, and a negative electrode layer. A negative electrode mixture layer of the negative electrode layer contains either one or both of a negative electrode active materia...