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Nanoporous Silicon Network Thin Films as Anodes for Lithium Ion Batteries

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
Various embodiments of the invention describe nanoporous silicon (Si) network thin films with controllable porosity and thickness that are fabricated by a robust and scalable electrochemical process, and then released from Si wafers and transferred to flexible and conductive substrates. These nanoporous Si network thin films serve as high performance Li-ion battery electrodes, with an initial discharge capacity of 2570 mA h g.sup.-1, above 1000 mA h g.sup.-1 after 200 cycles without any electrolyte additives.
Zhang, Xiang (Alamo, CA), Zhu, Jia (San Jose, CA), Gladden, Christopher (Aptos, CA), Barth, David (Berkeley, CA)
The Regents of the University of California (Oakland CA)
14/ 542,145
November 14, 2014
STATEMENT OF GOVERNMENTAL SUPPORT [0002] The invention described and claimed herein was made in part utilizing funds supplied by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 between the U.S. Department of Energy and the Regents of the University of California for the management and operation of the Lawrence Berkeley National Laboratory. The government has certain rights in this invention.