| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of improving battery characteristics, especially high-temperature cycle characteristics, in an accumulator device using a Titanate compound expressed by a compositional formula of H<SB>2</SB>Ti<SB>12</SB>O<SB>25</SB>for an electrode active material. <P>SOLUTION: When the Titanate compound is used as a negative electrode active material, an initial charging is performed so that potential of the negative electrode is within a range of 0.1 to 1.3 V to potential of metal lithium, and then the charged state is held. When the Titanate compound is used for a positive electrode active material, the initial charging is performed so that potential of the positive electrode is within a range of 0.1 to 1.3 V to potential of metal lithium, and then the discharged state is held. The accumulator device has high discharge potential, excellent safety, and also excellent high-temperature cycle characteristics. <P>COPYRIGHT: (C)2011,JPO&INPIT |
