| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a negative electrode material for a lithium ion secondary battery practically containing no metals, a negative electrode material for a lithium ion secondary battery inhibiting degradation in battery characteristics caused by the volumetric change of Si associated with charge and discharge, and offering a high discharge capacity and excellent cycle characteristics, and a method for manufacturing a negative electrode material for a lithium ion secondary battery by a simple and safe reaction process without using a metal catalyst. <P>SOLUTION: A negative electrode material for a lithium ion secondary battery in accordance with an embodiment contains silicon particles and carbon nanofibers, and the carbon nanofibers are composed of SiC nanowires and/or multilayer carbon nanotubes. A negative electrode material for a lithium ion secondary battery in accordance with another embodiment contains silicon particles and carbon nanofibers, and the carbon nanofibers have an average diameter of 20 to 120 nm. <P>COPYRIGHT: (C)2013,JPO&INPIT |
