| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a negative electrode material for a lithium ion secondary battery having high discharge capacity, high initial charge discharge efficiency, and making quick charge possible even if a negative electrode is manufactured by using, especially, an aqueous binder; and to provide its manufacturing method; a negative electrode for the lithium ion secondary battery using the negative electrode material; and a lithium ion secondary battery. <P>SOLUTION: The manufacturing method of graphite particles as a negative electrode material for a lithium ion secondary battery is such that mechanochemical treatment is applied to the graphite particles to make the surfaces of the graphite particles hydrophilic. Preferably, the mechanochemical treatment is performed under the coexistence of hard fine particles. <P>COPYRIGHT: (C)2009,JPO&INPIT |
