Micrometer-sized ferrosilicon composites wrapped with multi-layered carbon nanosheets as industrialized anodes for high energy lithium-ion batteries

• 作者: Anbang Wang Hai Ming Jingyi Qiu Meng Li Pengcheng Zhao Songtong Zhang Yue Wang Yusheng Yang Zhaoqing Jin
• 来源期刊: 能源化学
• 年，卷（期）: 2020,（11）
• 页码范围: 286-295
• 页数: 10页
• 语种: 英文

摘要

Various nanostructured architectures have been demonstrated to be effective to address the issues of high capacity Si anodes.However,the scale-up of these nano-Si materials is still a critical obstacle for commercialization.Herein,we use industrial ferrosilicon as low-cost Si source and introduce a facile and scalable method to fabricate a micrometer-sized ferrosilicon/C composite anode,in which ferrosilicon microparticles are wrapped with multi-layered carbon nanosheets.The multi-layered carbon nanosheets could effectively buffer the volume variation of Si as well as create an abundant and reliable conductivity framework,ensuring fast transport of electrons.As a result,the micrometer-sized ferrosilicon/C anode achieves a stable cycling with 805.9 mAh g-1 over 200 cycles at 500 mA g-1 and a good rate capability of 455.6 mAh g-1 at 10 A g-1.Therefore,our approach based on ferrosilicon provides a new opportunity in fabricating cost-effective,pollution-free,and large-scale Si electrode materials for high energy lithium-ion batteries.