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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.:

US 9302914 B1

PDFFull Text
Date of Patent:
Apr. 05, 2016

Filed:

Feb. 28, 2014

Methods for making hollow carbon materials and active materials for electrodes

Applicant:

GM Global Technology Operations Llc, Detroit, MI (US);

Inventors:

Zhongyi Liu, Troy, MI (US);

Qiangfeng Xiao, Troy, MI (US);

Xingcheng Xiao, Troy, MI (US);

Michael K. Carpenter, Troy, MI (US);

Mei Cai, Bloomfield Hills, MI (US);

Assignee:

GM Global Technology Operations LLC, Detroit, MI (US);

Attorney:

Dierker & Associates, P.C.

Primary Examiner:

Roberts Culbert

Int. Cl.
CPC ...
B44C 1/22 (2006.01); C23F 1/00 (2006.01); C23F 3/00 (2006.01); C01B 31/04 (2006.01); H01M 4/04 (2006.01); H01M 4/13 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); C01B 31/02 (2006.01); H01M 4/02 (2006.01); H01M 4/38 (2006.01); H01M 4/48 (2010.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
C01B 31/04 (2013.01); C01B 31/02 (2013.01); H01M 4/0471 (2013.01); H01M 4/13 (2013.01); H01M 4/362 (2013.01); H01M 4/625 (2013.01); H01M 4/38 (2013.01); H01M 4/387 (2013.01); H01M 4/483 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01);
Abstract

In an example of a method for making a hollow carbon material, a carbon black particle is obtained. The carbon black particle has a concentric crystallite structure with an at least partially amorphous carbon core and a graphitic carbon shell surrounding the at least partially amorphous carbon core. The carbon black particle is exposed to any of a heat treatment, a chemical treatment, or an electrochemical treatment which removes the at least partially amorphous carbon core to form the hollow carbon material.

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