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Breakthrough Battery Technology
Silicon (Si) is one of the most promising anode materials being considered for next generation, high-energy and high-power lithium ion batteries (LIBs). Graphite is currently the most widely used anode material, but Si has attracted great attention because of its natural abundance, non-toxicity, and theoretical storage capacity of nearly 4200 mAh/g, or about 10 times more capacity than conventional graphite anodes. More capacity will mean longer distance EVs can go before needing to recharge. While pure silicon doesn’t exist in nature, it is readily available in sand, quartz and rock crystals. You might know silicon as the primary material used in electronics chips found in iPhones, TVs, computers and virtually all electronics products.
Si anodes suffer from large volume expansion and contraction during lithium-ion charge-discharge cycling. This continuous volume change pulverizes the Si material over time and leads to battery failure. This is the primary challenge that BioSolar’s innovative technology intends to overcome, as well as maximizing the performance of Si anode batteries.
BioSolar’s Performance Boosting Additives improve the performance of silicon anodes by: (1) increasing the efficiency of lithium-ion transfer, and (2) preserving the silicon anode structure during silicon’s volume expansion and contraction associated with charge-discharge cycling. This will help increase the storage capacity and life of lithium-ion batteries made from various types of silicon anodes.
BioSolar is currently preparing commercial grade prototype battery cells to demonstrate the benefits of its Performance Boosting Additives in a complete silicon anode lithium-ion battery. Commercial partners working on this project include Ferroglobe PLC, one of the world’s largest suppliers of raw silicon materials, and Top Battery, a South Korean manufacturer of EV batteries.