|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials for Energy Conversion and Storage
||Silicon/Graphite Nanocomposites with a Thin Carbon Shell: How Etching Enhances the Electrochemical Performance of Si-based Composite
||Maziar Ashuri, Qianran He, Leon L. Shaw
|On-Site Speaker (Planned)
Search for high-performance anodes of Li-ion batteries has been the dominant trend in the last two decades. One of the strongest contenders for this role is silicon with up to 4000 mA h g-1 theoretical capacity. To achieve this climax, we have proposed a facile and green synthesis method based on high-energy ball milling, carbon coating and selective etching in aqueous medium. The electrochemical results showed higher rate capability in longer cycling along with higher discharge capacity, demonstrating 1800 mA h g-1 discharge capacity at the first cycle, 580 mA h g-1 after 40 cycles at 0.5 A g-1, and 350 mA h g-1 after 300 cycles at 0.1 A g-1. The new synthesis method is scalable at industry environment and capable of producing low cost Si anodes with high performance, paving the way for commercializing silicon anodes for high performance Li-ion batteries in the future.