December 26, 2019
Silicon anodes can store up to 10 times more energy
Silicon anodes can store up to 10 times more energy than conventional graphite
anodes, but expansion and shrinkage during charge and discharge make them
unstable. Hence, we have very promising candidates for next-generation
lithium-ion batteries,†Li said."We started with a waste product that was headed
for the landfill and created batteries that stored more energy, charged faster,
and were more stable than commercial coin cell batteries. Financial support for
this work was provided by the UC-Riverside and UC Faculty Climate Champion
initiative.As expected, coin cell batteries made using the glass bottle-based
silicon anodes greatly outperformed traditional batteries in laboratory tests.
In
addition to Mihri and Cengiz Ozkan and Li, contributors include graduate
students Chueh Liu, Wei Wang, Zafer Mutlu, Jeffrey Bell, Kazi Ahmed and Rachel
Ye.This research is the latest in a series of projects led by Mihri and Cengiz
Ozkan to create lithium-ion battery anodes from environmentally friendly
materials.Changling Li, a graduate student in materials science and engineering
and lead author on the paper, said one glass bottle provides enough nanosilicon
for hundreds of coin cell batteries or three-five pouch cell batteries.
Downsizing silicon to the nanoscale has been shown to reduce this problem, and
by combining an abundant and relatively pure form of silicon dioxide and a
low-cost chemical reaction, the researchers created lithium-ion half-cell
batteries that store almost four times more energy than conventional graphite
anodes. (Representational image) Researchers at the University of California,
Riverside’s Bourns College of Engineering have used waste glass bottles and a
low-cost chemical process to create nanosilicon anodes for high-performance
lithium-ion batteries.
Cengiz Ozkan, professor of mechanical engineering, and
Mihri Ozkan, professor of electrical engineering, led the project. Previous
research has focused on developing and testing anodes from portabella mushrooms,
sand, and diatomaceous SMF
batteries factory (fossil-rich) earth.UCR researchers are turning glass
bottles into high performance lithium-ion batteries for electric vehicles and
personal electronics.
Titled "Silicon Derived from Glass Bottles as Anode
Materials for Lithium Ion Full Cell Batteries,†an article describing the
research was published today in the Nature journal Scientific Reports. The
batteries will extend the range of electric vehicles and plug-in hybrid electric
vehicles, and provide more power with fewer charges to personal electronics like
cell phones and laptops. Carbon-coated glass derived-silicon (gSi@C) electrodes
demonstrated excellent electrochemical performance with a capacity of ~1420
mAh/g at C/2 rate after 400 cycles.
To create the anodes, the team used a
three-step process that involved crushing and grinding the glass bottles into a
fine white power, a magnesiothermic reduction to transform the silicon dioxide
into nanostructured silicon, and coating the silicon nanoparticles with carbon
to improve their stability and energy storage properties.
Even with today’s
recycling programs, billions of glass bottles end up in landfills every year,
prompting the researchers to ask whether silicon dioxide in waste beverage
bottles could provide high purity silicon nanoparticles for lithium-ion
batteries
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