Porous silicon based anode material formed using metal reduction
Abstract
A porous silicon based material comprising porous crystalline elemental silicon formed by reducing silicon dioxide with a reducing metal in a heating process followed by acid etching is used to construct negative electrode used in lithium ion batteries. Gradual temperature heating ramp(s) with optional temperature steps can be used to perform the heating process. The porous silicon formed has a high surface area from about 10 m.sup.2/g to about 200 m.sup.2/g and is substantially free of carbon. The negative electrode formed can have a discharge specific capacity of at least 1800 mAh/g at rate of C/3 discharged from 1.5V to 0.005V against lithium with in some embodiments loading levels ranging from about 1.4 mg/cm.sup.2 to about 3.5 mg/cm.sup.2. In some embodiments, the porous silicon can be coated with a carbon coating or blended with carbon nanofibers or other conductive carbon material.
- Inventors:
- Issue Date:
- Research Org.:
- Envia Systems, Inc., Newark, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1221392
- Patent Number(s):
- 9139441
- Application Number:
- 13/354,096
- Assignee:
- Envia Systems, Inc. (Newark, CA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
- DOE Contract Number:
- AR0000034
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2012 Jan 19
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Anguchamy, Yogesh Kumar, Masarapu, Charan, Deng, Haixia, Han, Yongbong, Venkatachalam, Subramanian, Kumar, Sujeet, and Lopez, Herman A. Porous silicon based anode material formed using metal reduction. United States: N. p., 2015.
Web.
Anguchamy, Yogesh Kumar, Masarapu, Charan, Deng, Haixia, Han, Yongbong, Venkatachalam, Subramanian, Kumar, Sujeet, & Lopez, Herman A. Porous silicon based anode material formed using metal reduction. United States.
Anguchamy, Yogesh Kumar, Masarapu, Charan, Deng, Haixia, Han, Yongbong, Venkatachalam, Subramanian, Kumar, Sujeet, and Lopez, Herman A. Tue .
"Porous silicon based anode material formed using metal reduction". United States. https://www.osti.gov/servlets/purl/1221392.
@article{osti_1221392,
title = {Porous silicon based anode material formed using metal reduction},
author = {Anguchamy, Yogesh Kumar and Masarapu, Charan and Deng, Haixia and Han, Yongbong and Venkatachalam, Subramanian and Kumar, Sujeet and Lopez, Herman A.},
abstractNote = {A porous silicon based material comprising porous crystalline elemental silicon formed by reducing silicon dioxide with a reducing metal in a heating process followed by acid etching is used to construct negative electrode used in lithium ion batteries. Gradual temperature heating ramp(s) with optional temperature steps can be used to perform the heating process. The porous silicon formed has a high surface area from about 10 m.sup.2/g to about 200 m.sup.2/g and is substantially free of carbon. The negative electrode formed can have a discharge specific capacity of at least 1800 mAh/g at rate of C/3 discharged from 1.5V to 0.005V against lithium with in some embodiments loading levels ranging from about 1.4 mg/cm.sup.2 to about 3.5 mg/cm.sup.2. In some embodiments, the porous silicon can be coated with a carbon coating or blended with carbon nanofibers or other conductive carbon material.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 22 00:00:00 EDT 2015},
month = {Tue Sep 22 00:00:00 EDT 2015}
}
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