| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of graphite particles, and a lithium secondary battery in which kinds of battery characteristics are excellent in good balance; an impregnation property of electrolyte into an electrode is excellent; its production is possible within a short period; since an initial irreversible capacity is small, that is, a battery capacity lost at the first time charge discharge is reduced, capacity density is high; low temperature discharge efficiency is excellent, that is, high current density discharge in low temperature environment is possible; and a cycle maintenance rate is high, and so on. <P>SOLUTION: A manufacturing method of graphite particles includes the steps of: as to natural graphite with a circularity equal to or higher than 0.85, dissolving polymeric material in a solvent to impregnate into the graphite; after that, desiccating it; and thereby, impregnating the polymeric material into the natural graphite. <P>COPYRIGHT: (C)2012,JPO&INPIT |
