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Dispersion-optimized Silicon nanoparticle (SiNP)/Graphene composite anode for high performance Lithium ion battery (LIB)
Wayne State University
posted on 01/16/2012
Regular
ultrasonication is the principal preparative technique used to disperse Si
particles in current silicon/carbon based composite anodes. These result in fairly uniform
distribution of large agglomerated Si particles which exhibit large initial
discharge capacities. However, due to the macro scale particle configuration,
significant capacity decay is observed on the succeeding cycles. What is left afterwards is typically a
stable capacity around 60 % of the first discharge. Wayne
State University researchers have invented a novel method to produce
dispersion-optimized SiNP within a conducting Graphene matrix forming a
standalone composite anode material. The method creates small clusters to lone
particle distributions maximizing the nanomaterial properties of SiNP yielding
anodes with improved capacity retention and rate performance. It utilizes combinations of high
power/energy sonics and chemical surfactants that warrant proper distribution of
non-agglomerated SiNPs. Commercial
Applications: Energy
storage for: ·
Vehicle
propulsion ·
Intermittent
energy sources ·
Other
high energy sources Technological
Advantages: ·
Optimized
dispersion of the particles within the composite using high power/energy
dispersion techniques coupled with surfactants that is simple and inexpensive to
execute ·
Increase
the current energy content of Lithium ion batteries by as much as 5
times
File Number: 11-1066
This innovation currently is not available for online licensing. Please contact Lori Simoes at Wayne State University for more information.
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