Electrode protective film forming agent, electrode, electrolyte, lithium secondary battery, lithium ion capacitor, and electrode protective film forming method

摘要

An object of the present invention is to provide an electrode protective film forming agent for a lithium secondary battery or a lithium ion capacitor having excellent output characteristics, and the electrode protective film forming agent (B) of the present invention is a group -M. -Is a group having a lithium ion coordination energy of 100 to 1500 kJ / mol determined by density functional calculation (B3LYP / 6-31G (d)), and a group -M-Li + (m) and a polymerizable group ( It contains a compound (K) having a), preferably a lithium oxoacid (A).