Chris H Kang

US Patent:

20130078508, Mar 28, 2013

Filed:

Jun 7, 2011

Appl. No.:

13/702990

Inventors:

Sarah H. Tolbert - Encino CA, US
Eric J. Nemanick - Santa Monica CA, US
Chris Byung-Hwa Kang - Cypress CA, US

Assignee:

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - Oakland CA

International Classification:

H01M 4/134
H01M 10/0561

US Classification:

429188, 429209, 4292181, 429232, 977755, 977762, 977773, 977780

Abstract:

A lithium ion battery that incorporates an anode formed from a Group IV semiconductor material such as porous silicon is disclosed. The battery includes a cathode, and an anode comprising porous silicon. In some embodiments, the anode is present in the form of a nanowire, a film, or a powder, the porous silicon having a pore diameters within the range between 2 nm and 100 nm and an average wall thickness of within the range between 1 nm and 100 nm. The lithium ion battery further includes, in some embodiments, a non-aqueous lithium containing electrolyte. Lithium ion batteries incorporating a porous silicon anode demonstrate have high, stable lithium alloying capacity over many cycles.