硅
阳极
材料科学
电化学
放热反应
纳米-
电极
化学工程
纳米技术
碳纤维
作者
Zachary Favors,Wei Wang,Hamed Hosseini Bay,Zafer Mutlu,Kazi Ahmed,Chueh Liu,Mihrimah Ozkan,Cengiz S. Ozkan
摘要
Herein, porous nano-silicon has been synthesized via a highly scalable heat scavenger-assisted magnesiothermic reduction of beach sand. This environmentally benign, highly abundant, and low cost SiO₂ source allows for production of nano-silicon at the industry level with excellent electrochemical performance as an anode material for Li-ion batteries. The addition of NaCl, as an effective heat scavenger for the highly exothermic magnesium reduction process, promotes the formation of an interconnected 3D network of nano-silicon with a thickness of 8-10 nm. Carbon coated nano-silicon electrodes achieve remarkable electrochemical performance with a capacity of 1024 mAhg(-1) at 2 Ag(-1) after 1000 cycles.
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