| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery having superior float characteristics. <P>SOLUTION: The nonaqueous electrolyte secondary battery includes: a positive electrode having a positive electrode active material layer provided on a positive electrode collector; a negative electrode having a negative electrode active material layer provided on a negative electrode collector; and a nonaqueous electrolyte. The nonaqueous electrolyte contains at least one of sulfone compounds represented by the following formulae (1) and (2), and an inorganic phosphorus compound represented by the following formula (3) exists on the surface of a positive electrode active material. R1 represents C<SB>m</SB>H2<SB>m-n1</SB>X<SB>n2</SB>, X represents a halogen, m represents an integer from 2 to 7 and each of n1 and n2 independently represents an integer from 0 to 2m; R2 represents C<SB>j</SB>H<SB>2j-k1</SB>Z<SB>k2</SB>, Z represents a halogen, j represents an integer from 2 to 7 and each of k1 and k2 independently represents an integer from 0 to 2j; each of R3, R4 and R5 independently represents H or OH, where a is 0 or 1. <P>COPYRIGHT: (C)2010,JPO&INPIT |
