The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2015
Filed:
Mar. 12, 2013
Furukawa Electric Co., Ltd., Chiyoda-ku, Tokyo, JP;
Tohoku Techno Arch Co., Ltd., Sendai-shi, Miyagi, JP;
Hirokazu Yoshida, Tokyo, JP;
Kazutomi Miyoshi, Tokyo, JP;
Kazuhiko Kurusu, Tokyo, JP;
Toshio Tani, Tokyo, JP;
Koji Hataya, Tokyo, JP;
Takeshi Nishimura, Tokyo, JP;
Hidemi Kato, Tokyo, JP;
Takeshi Wada, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
Tohoku Techno Arch Co., Ltd., Miyagi, JP;
Abstract
Porous silicon particles and complex porous silicon particles suitable for negative electrode materials etc. for lithium-ion batteries, which achieve high capacity and good cycling characteristics, are provided. Porous silicon particles formed by the joining of a plurality of silicon microparticles, and having an average particle diameter of 0.1 μm to 1000 μm, a three-dimensional network structure having continuous gaps, an average porosity of 15 to 93%, and a structure in which the particles of a whole particle are uniform. Complex porous silicon particles formed by the joining of a plurality of silicon microparticles and a plurality of silicon compound particles, and characterized by containing a compound of silicon and composite elements, having an average particle diameter of 0.1 μm to 1000 μm, and having a three-dimensional network structure having continuous gaps.