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Title: Mesoporous silicon synthesis and applications in Li-ion batteries and solar hydrogen fuel cells

Patent ·
OSTI ID:1358270
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We provide a mesoporous silicon material (PSi) prepared via a template-free and HF-free process. The production process is facile and scalable, and it may be conducted under mild reaction conditions. The silicon may be produced directly by the reduction of a silicon-halogenide precursor (for example, SiCl.sub.4) with an alkaline alloy (for example, NaK alloy). The resulting Si-salt matrix is then annealed for the pore formation and crystallite growth. Final product is obtained by removal of the salt by-products with water.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-05CH11231
Assignee:
The Penn State Research Foundation
Patent Number(s):
9,656,243
Application Number:
14/328,136
OSTI ID:
1358270
Resource Relation:
Patent File Date: 2014 Jul 10
Country of Publication:
United States
Language:
English

References (9)

Process For Preparing High Purity Silicon Oxide Porous Beads Doped With Small Quantities Of Other Oxides patent January 1973
Methods Of Fabricating Nanoscale-To-Microscale Structures patent-application February 2008
Porous Anode Active Material, Method Of Preparing The Same, And Anode And Lithium Battery Employing The Same patent-application June 2008
SI/C Composite, Anode Active Materials, and Lithium Battery Including the Same patent-application January 2009
Process for the Production of High Purity Elemental Silicon patent-application June 2010
Ceramic Particles With Controlled Pore and/or Microsphere Placement and/or Size and Method Of Making Same patent-application June 2011
Anodes Of Porous Silicon Particles patent-application September 2012
Anodes With Mesoporous Silicon Particles patent-application September 2012
Chemical reduction of three-dimensional silica micro-assemblies into microporous silicon replicas journal March 2007

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25 ENERGY STORAGE