| 摘要 |
PROBLEM TO BE SOLVED: To prevent formation of dendrite which is generally formed at the time of charging and provide a lithium ion secondary battery with high safety by using a quinone as a non-electrolytic substance and adding a specified amount of a reduced substance corresponding to the quinone to the electrolytic solution. SOLUTION: In a lithium ion secondary battery containing a non-electrolytic substance, the non-electrolytic solution contains a quinone having chemical formula 1, 2, 3, 4, 5, or 6 and further contains 0.001-0.2mol/l of one or more reduced substances corresponding to the quinone having the chemical formula. In respective formulas, m, n stand for the number of substituents in the range of 1-4; p, q, s for the number of substituents in the range of 1-6; r for the number of substituents in the range of 1-8; and R1-R6 stand respectively for one of substituent selected from hydrogen, alkyl groups of 1-4 carbons, -C6 H5 , -F, -Cl, -Br, -I, -OH, -OCH3 , -OC2 H5 , -CN, -NH2 , -N(CH3 )2 , -SO3 H, -COOR (wherein R stands for hydrogen or alkyl groups of 1-4 carbons). |
