Title:
POWDER FOR LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE MATERIAL, LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE AND CAPACITOR NEGATIVE ELECTRODE, AND LITHIUM ION SECONDARY BATTERY AND CAPACITOR
Document Type and Number:
WIPO Patent Application WO/2012/011247
Kind Code:
A1
Abstract:
A powder for a lithium ion secondary battery negative electrode material, which comprises a lower silicon oxide powder and an electrically conductive carbon film formed on the surface of the powder, and which is characterized in that the specific surface area is more than 0.3 m2/g and not more than 40 m2/g as measured by a BET method, and no peak of SiC appears or a half width of a peak of SiC is 2° or more at 2θ = 35.6°±0.1° as measured by XRD using a CuKα ray. It is preferred that the content of the electrically conductive carbon film in the powder for a lithium ion secondary battery negative electrode material is 0.2 to 2.5 mass% inclusive. It is also preferred that the lower silicon oxide powder has a specific resistivity of 100000 Ωcm or less and the maximum value (P1) of a halo derived from SiOx as measured by XRD measurement and the strongest line peak value (P2) of Si (111) fulfill the requirement represented by the formula: P2/P1 < 0.01.
In this manner, it is possible to provide a powder for a negative electrode material for use in a lithium ion secondary battery, which has large discharge capacity and good cycle properties and can be used in use applications at practical level.
Inventors:
YASUDA, Kouji (1, Higashihama-cho, Amagasaki-sh, Hyogo 33, 〒6608533, JP)
安田 幸司 (〒33 兵庫県尼崎市東浜町１番地株式会社大阪チタニウムテクノロジーズ内 Hyogo, 〒6608533, JP)
KIZAKI, Shingo (1, Higashihama-cho, Amagasaki-sh, Hyogo 33, 〒6608533, JP)
安田 幸司 (〒33 兵庫県尼崎市東浜町１番地株式会社大阪チタニウムテクノロジーズ内 Hyogo, 〒6608533, JP)
KIZAKI, Shingo (1, Higashihama-cho, Amagasaki-sh, Hyogo 33, 〒6608533, JP)
Application Number:
JP2011/003938
Publication Date:
January 26, 2012
Filing Date:
July 08, 2011
Export Citation:
Assignee:
OSAKA TITANIUM TECHNOLOGIES CO., LTD. (1 Higashihama-cho, Amagasaki-shi Hyogo, 33, 〒6608533, JP)
株式会社大阪チタニウムテクノロジーズ (〒33 兵庫県尼崎市東浜町１番地 Hyogo, 〒6608533, JP)
YASUDA, Kouji (1, Higashihama-cho, Amagasaki-sh, Hyogo 33, 〒6608533, JP)
安田 幸司 (〒33 兵庫県尼崎市東浜町１番地株式会社大阪チタニウムテクノロジーズ内 Hyogo, 〒6608533, JP)
株式会社大阪チタニウムテクノロジーズ (〒33 兵庫県尼崎市東浜町１番地 Hyogo, 〒6608533, JP)
YASUDA, Kouji (1, Higashihama-cho, Amagasaki-sh, Hyogo 33, 〒6608533, JP)
安田 幸司 (〒33 兵庫県尼崎市東浜町１番地株式会社大阪チタニウムテクノロジーズ内 Hyogo, 〒6608533, JP)
International Classes:
H01M4/48; H01G9/058; H01M4/36
Attorney, Agent or Firm:
MORI, Michio et al. (M. MORI PATENT OFFICE, 17-23 Higashinaniwa-cho 5-chome, Amagasaki-sh, Hyogo 92, 〒6600892, JP)
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