Biomaterial-derived hard carbon, negative electrode materials, negative electrodes, and alkaline ion batteries

摘要

PROBLEM TO BE SOLVED: To provide a hard carbon capable of increasing the discharge capacity of an electrode, a negative electrode material made of the hard carbon, a negative electrode made of the negative electrode material, and an alkaline ion battery provided with the negative electrode. Aged biomass 12 is carbonized to obtain hard carbon-14. As the material to be carbonized, the raw material biomass 10 may or may not be added to the aged biomass 12. The obtained hard carbon 14 may be used as it is as a negative electrode material, or an additive 16 may be added to use it as a negative electrode material. The negative electrode material is molded to produce the negative electrode 18. [Selection diagram] Fig. 1