Advantage of silicon composed lithium ion battery
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The current crop of battery technology seems unable to keep up with the increasing demands we are placing on our ever-growing collection of mobile devices. Which is why research into next generation battery technology is such a focus around the world. A new high-performance anode structure based on silicon-carbon composite materials could significantly improve the performance of lithium-ion batteries used in our portable electronics and gaining widespread use in electric and hybrid vehicles.
Graphite vs Silicon
Existing lithium-ion batteries rely on anodes made from graphite, a form of carbon. They generate an electric current by transferring lithium ions between two electrodes – a cathode and an anode – through a liquid electrolyte. The more efficiently the lithium ions can enter the two electrodes during charge and discharge cycles, the larger the battery’s capacity will be. Silicon-based anodes theoretically offer as much as a ten-fold capacity improvement over graphite, but silicon-based anodes have so far not been stable enough for practical use.
Produced with a “bottom-up” self-assembly technique, the new high-performance anode structure developed by researchers at the Georgia Institute of Technology takes advantage of nanotechnology to fine-tune its materials properties, addressing the shortcomings of earlier silicon-based battery anodes.
Graphite anodes use particles ranging in size from 15 to 20 microns. If silicon particles of that size are simply substituted for the graphite, expansion and contraction as the lithium ions enter and leave the silicon creates cracks that quickly cause the anode to fail.
Hope it helps...All the best
Graphite vs Silicon
Existing lithium-ion batteries rely on anodes made from graphite, a form of carbon. They generate an electric current by transferring lithium ions between two electrodes – a cathode and an anode – through a liquid electrolyte. The more efficiently the lithium ions can enter the two electrodes during charge and discharge cycles, the larger the battery’s capacity will be. Silicon-based anodes theoretically offer as much as a ten-fold capacity improvement over graphite, but silicon-based anodes have so far not been stable enough for practical use.
Produced with a “bottom-up” self-assembly technique, the new high-performance anode structure developed by researchers at the Georgia Institute of Technology takes advantage of nanotechnology to fine-tune its materials properties, addressing the shortcomings of earlier silicon-based battery anodes.
Graphite anodes use particles ranging in size from 15 to 20 microns. If silicon particles of that size are simply substituted for the graphite, expansion and contraction as the lithium ions enter and leave the silicon creates cracks that quickly cause the anode to fail.
Hope it helps...All the best
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