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Adding Silicon Waste Improves Performance of Li-Ion Batteries Written by AZoMFeb 9 2021 Scientists at Osaka University have created lithium-ion battery (LIB) electrodes with silicon (Si) swarf or graphite sheet composites. This helped achieve a reduction in cost, environmental friendliness, and high performance. Fabrication of electrode with Si swarf/graphite sheet composites. Image Credit: Osaka University. LIBs have been used extensively in several mobile electronics. Issues regarding climate change and global warming have recently increased the demand for LIBs in solar photovoltaic output smoothing and electric vehicles. Related Stories Si has been examined as an active material with a high theoretical capacity of 3578 mAh/g, which is approximately 10 times higher compared to that of graphite (372 mAh/g). ....
Credit: Osaka University Li-ion batteries (LIBs) are widely used in various mobile electronics. Concerns of global warming and climate change have recently boosted the demand for LIBs in electric vehicles and solar photovoltaic output smoothing. Si has been studied as an active material with a high theoretical capacity of 3578 mAh/g, which is around ten times higher than that of graphite (372 mAh/g). Now, a team of researchers at Osaka University has used flake-shaped Si nanopowder wrapped by ultrathin graphite sheets (GSs) to fabricate LIB electrodes with high areal capacity and current density. Generally treated as industrial waste, Si swarf is generated at a rate of 100,000 tons per year globally from Si ingots that are produced from silica through processes at 1000~1800°C. Water-based coolants and fixed abrasive grain wire saws are paving the way to the use of Si swarf as an anode active material with a high capacity at a reduced cost. ....