阳极
制作
材料科学
锂(药物)
复合数
多孔性
复合材料
电化学
介孔材料
化学工程
纳米颗粒
图层(电子)
碳纤维
纳米技术
电极
化学
催化作用
工程类
医学
替代医学
物理化学
病理
内分泌学
生物化学
作者
Chan-Woo Min,Aqsa Nazir,Hang T.T. Le,Chan-Jin Park
标识
DOI:10.1002/batt.202100403
摘要
Abstract In this work, we synthesized highly porous 3D sponge‐like mesoporous (MP)‐Si@C composites using mass‐scalable method. The optimized MP−Si@C 1 composite electrode, provided a reversible capacity of 1887 mAh g −1 after 100 discharge−charge cycles with capacity retention of 83 % at the rate of 0.1 C. At high C‐rate the MP−Si@C 1 anode provided reversible capacity of 910 mAh g −1 after 1000 cycles. The MP−Si@C 1/LCO full cell provide a discharge capacity of 1515 mAh g −1 and it works well for 100 cycles. This outstanding electrochemical behavior of the MP−Si@C 1 composite electrode was accredited to the exclusive structure of interconnected Si nanoparticles and the presence of the outer C thin layer. The carbon layer served as a shield, an effective buffer layer to house the extreme volume expansion issue of Si during continuous cycling. The excellent performance of the MP−Si@C 1 composite demonstrated its high applicability as potential anode material for next‐generation LIBs.
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