| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery effectively exhibiting characteristics intrinsically provided by a negative electrode. <P>SOLUTION: The lithium ion secondary battery contains a negative electrode containing composite particles made by compositing first particles of graphite and second particles containing silicon atoms using a carbonaceous material different from graphite; a positive electrode containing at least one kind selected from the group consisting of LiCoO<SB POS="POST">2</SB>, LiNiO<SB POS="POST">2</SB>, LiNi<SB POS="POST">1-x-y</SB>Co<SB POS="POST">x</SB>Mn<SB POS="POST">y</SB>O<SB POS="POST">2</SB>(0<x and y<1), LiNi<SB POS="POST">2-x</SB>Mn<SB POS="POST">x</SB>O<SB POS="POST">4</SB>(0<x≤2), and LiFePO<SB POS="POST">4</SB>; and an electrolyte. <P>COPYRIGHT: (C)2012,JPO&INPIT |
