| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which inhibits the reaction of a cathode active substance and a nonaqueous electrolyte and the like, and can attain a high charge-discharge capacity and excellent charge-discharge cycle performance, where a thin film made of the cathode active substance including a metal to store/emit lithium is formed on a collector of the nonaqueous electrolyte secondary battery, and the thin film made of the cathode active substance is divided into pillars by cuts. <P>SOLUTION: The nonaqueous electrolyte secondary battery is constituted such that: a cathode of the pillars is formed into which the thin film made of a cathode active substance 2a is divided by cuts 2c, where the cathode active substance 2a includes the metal to store/emit lithium, and the thin film is formed on a collector 2b; an anode which uses an anode active substance to store/emit lithium; and a nonaqueous electrolyte made of a nonaqueous solvent into which a lithium salt is dissolved where other lithium salt than LiBF<SB>4</SB>is dissolved into the nonaqueous electrolyte, and the nonaqueous electrolyte is doped with BF<SB>4</SB>salt. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
