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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 9455447 B1

PDFFull Text
Date of Patent:
Sep. 27, 2016

Filed:

Sep. 26, 2013

Lithium-sulfur battery and methods of preventing insoluble solid lithium-polysulfide deposition

Applicant:

Eaglepicher Technologies, Llc, Joplin, MO (US);

Inventors:

Ramanathan Thillaiyan, Joplin, MO (US);

Wujun Fu, Joplin, MO (US);

Mario Destephen, Joplin, MO (US);

Greg Miller, Diamond, MO (US);

Ernest Ndzebet, Carl Junction, MO (US);

Umamaheswari Janakiraman, Webb City, MO (US);

Assignee:

EAGLEPICHER TECHNOLOGIES, LLC, Joplin, MO (US);

Attorney:

Kenealy Vaidya LLP

Primary Examiner:

Edward Tso

Assistant Examiner:

Dung V Bui

Int. Cl.
CPC ...
H01M 4/62 (2006.01); H01M 10/058 (2010.01); H01M 4/58 (2010.01); H02J 7/00 (2006.01); H01M 4/04 (2006.01); H01M 2/16 (2006.01); H01M 10/052 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); H01M 4/13 (2010.01); H01M 4/38 (2006.01);
U.S. Cl.
CPC ...
H01M 4/628 (2013.01); H01M 2/1673 (2013.01); H01M 10/052 (2013.01); H01M 10/058 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H02J 7/0052 (2013.01); H01M 4/13 (2013.01); H01M 4/382 (2013.01); H01M 4/5815 (2013.01); Y02E 60/122 (2013.01); Y02T 10/7011 (2013.01); Y10T 29/49108 (2015.01);
Abstract

An improved lithium-sulfur battery containing a surface-functionalized carbonaceous material. The presence of the surface-functionalized carbonaceous material generates weak chemical bonds between the functional groups of the surface-functionalized carbonaceous material and the functional groups of the polysulfides, which prevents the polysulfide migration to the battery anode, thereby providing a battery with relatively high energy density and good partial discharge efficiency.

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