NON-AQUEOUS ELECTROLYTE FOR A LITHIUM BATTERY, LITHIUM BATTERY WHEREIN SAID ELECTROLYTE IS USED, AND HYDROXY-ACID DERIVATIVE FOR USE IN SAID ELECTROLYTE
申请人:Abe Koji
公开号:US20110064998A1
公开(公告)日:2011-03-17
Disclosed are (1) a nonaqueous electrolytic solution for lithium battery comprising an electrolyte dissolved in a nonaqueous solvent, which contains at least one hydroxy acid derivative compound represented by the formulae (I) and (II) in an amount of from 0.01 to 10% by mass of the nonaqueous electrolytic solution, and which can improve the low-temperature and high-temperature cycle property thereof (wherein R
1
represents an alkyl group having from 1 to 6 carbon atoms, an alkenyl group having from 2 to 6 carbon atoms, or an alkynyl group having from 3 to 6 carbon atoms, R
2
represents a sulfonyl group or a formyl group, R
3
and R
4
each represent a hydrogen atom or a methyl group); (2) a lithium battery comprising a positive electrode, a negative electrode and a nonaqueous electrolytic solution of an electrolyte salt dissolved in a nonaqueous solvent, wherein the nonaqueous electrolytic solution contains at least one hydroxy acid derivative compound represented by the above formulae (I) and (II) in an amount of from 0.01 to 10% by mass of the nonaqueous electrolytic solution; and (3) a hydroxy acid derivative compound represented by the following formula (III) or (IV) (wherein R
6
represents an alkenyl group having from 2 to 6 carbon atoms, or an alkynyl group having from 3 to 6 carbon atoms, R
7
represents a sulfonyl group or a formyl group, and R
8
and R
9
each represent a hydrogen atom or a methyl group).
本发明涉及一种非水电解质溶液,用于锂电池,包括在非水溶剂中溶解的电解质,其中包含至少一种由式(I)和(II)表示的羟基酸衍生物化合物,其质量分数为0.01至10%,可以提高其低温和高温循环性能(其中R1表示具有1至6个碳原子的烷基,具有2至6个碳原子的烯基或具有3至6个碳原子的炔基,R2表示磺酰基或甲酰基,R3和R4各表示氢原子或甲基);(2)一种锂电池,包括正极、负极和在非水溶剂中溶解的电解质盐的非水电解质溶液,其中非水电解质溶液包含至少一种以上式(I)和(II)表示的羟基酸衍生物化合物,其质量分数为0.01至10%;(3)一种由下式(III)或(IV)表示的羟基酸衍生物化合物(其中R6表示具有2至6个碳原子的烯基或具有3至6个碳原子的炔基,R7表示磺酰基或甲酰基,R8和R9各表示氢原子或甲基)。