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    • 9. 发明公开
    • 비수 전해액 및 그것을 이용한 리튬 2차 전지
    • 非电解电解液和锂二次电池使用相同
    • KR1020070089958A
    • 2007-09-04
    • KR1020077014538
    • 2005-11-24
    • 우베 고산 가부시키가이샤
    • 아베고지구와타다카아키다케모토히로후미
    • H01M10/05
    • H01M10/0567H01M6/164H01M10/052H01M2300/0025
    • Disclosed is a lithium secondary battery which is excellent in battery characteristics such as long-term cycle characteristics, battery capacity and storage characteristics. Also disclosed is a nonaqueous electrolyte solution which can be used in such a lithium secondary battery. Specifically disclosed is a nonaqueous electrolyte solution for lithium secondary batteries wherein an electrolyte salt is dissolved in a nonaqueous solvent. This nonaqueous electrolyte solution contains a dicarbonyl compound (i) represented by the formula (I) below, or alternatively a dicarbonyl compound (ii) represented by the formula (II) below and a vinylene carbonate or the like. (In the formula (I), R 1 represents a hydrogen atom, an alkyl group, an alkenyl group, a phenyl group or the like; and X represents a hydrogen atom, an R 2 group or an OR2 group, and R2 represents an alkyl group, an alkenyl group, a phenyl group or the like.) (In the formula (II), R1 and X are as defined above; Y and Z respectively represent a hydrogen atom, an R2 group, an OR 2 group, a COR2 group or a CH2COR2 group; and n represents a number of 1-6.)
    • 公开了一种锂电池,其电池特性如长期循环特性,电池容量和存储特性都优异。 还公开了可用于这种锂二次电池中的非水电解质溶液。 具体公开了一种其中电解质盐溶解在非水溶剂中的锂二次电池用非水电解液。 该非水电解质溶液含有下述式(I)表示的二羰基化合物(ⅰ)或下述式(II)表示的二羰基化合物(ⅱ)和碳酸亚乙烯酯等。 (式(I)中,R 1表示氢原子,烷基,烯基,苯基等,X表示氢原子,R 2基或OR 2基,R2表示 烷基,烯基,苯基等)(式(II)中,R 1和X如上所定义; Y和Z分别表示氢原子,R 2基,OR 2基, COR2基或CH2COR2基; n表示1-6的数))