TREATMENT AGENT FOR POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE ACTIVE MATERIAL COMPOSITE, MANUFACTURING METHOD OF THE SAME, POSITIVE ELECTRODE, AND POWER STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a technique capable of suppressing degradation of a storage battery.SOLUTION: The treatment agent is capable of capturing sodium and sulfur as a treatment agent for treating a Li-transition metal positive electrode active material containing lithium and a transition metal. Since the treatment agent is used in a gel-state and the Li-transition metal positive electrode active material contains sodium and sulfur as impurities, the treatment agent is effective.