发明名称 |
Negative electrode material for secondary battery having lithium-doped silicon-silicon oxide composite, method for manufacturing negative electrode, and lithium secondary battery |
摘要 |
The present invention is a negative electrode material for a secondary battery with a non-aqueous electrolyte comprising at least a silicon-silicon oxide composite and a carbon coating formed on a surface of the silicon-silicon oxide composite, wherein at least the silicon-silicon oxide composite is doped with lithium, and a ratio I(SiC)/I(Si) of a peak intensity I(SiC) attributable to SiC of 2θ=35.8±0.2° to a peak intensity I(Si) attributable to Si of 2θ=28.4±0.2° satisfies a relation of I(SiC)/I(Si)≦0.03, when x-ray diffraction using Cu-Kα ray. As a result, there is provided a negative electrode material for a secondary battery with a non-aqueous electrolyte that is superior in first efficiency and cycle durability to a conventional negative electrode material. |
申请公布号 |
US9614222(B2) |
申请公布日期 |
2017.04.04 |
申请号 |
US201414481521 |
申请日期 |
2014.09.09 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
Kawada Nobuo |
分类号 |
H01M2/16;H01M4/48;C23C16/26;C23C16/44;H01M4/134;H01M10/052;H01M4/36 |
主分类号 |
H01M2/16 |
代理机构 |
Oliff PLC |
代理人 |
Oliff PLC |
主权项 |
1. A method for manufacturing a negative electrode material for a secondary battery with a non-aqueous electrolyte comprising the following steps in order:
coating a surface of powder comprised of at least one of silicon oxide and a silicon-silicon oxide composite with carbon by heat CVD treatment, blending a lithium dopant with the powder coated with carbon, and thereafter heating the powder coated with carbon to be doped with lithium. |
地址 |
Tokyo JP |