Three-dimensional nickel-silicide foam loaded with dense silicon nanowires as a robust anode for lithium-ion batteries

被引:0
|
作者
Liu, Ting-Ting [1 ]
Ye, Zhuo-Feng [1 ]
Li, Shang-Qi [1 ]
Zhang, Yi [1 ]
Zhang, Yao-Wen [1 ]
Li, Xin-Tao [1 ]
Du, Fei-Hu [1 ]
机构
[1] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China
基金
上海市自然科学基金;
关键词
Silicon nanowires; Supercritical fluid-liquid-solid synthesis; High loading; 3D NixSiy foam; Lithium-ion batteries; HIGH-ENERGY; SI; NANOSPHERES; COMPOSITE; GERMANIUM; KINETICS;
D O I
10.1007/s11581-024-05764-2
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Silicon, with its many advantages, is gaining attention in the field of lithium-ion battery anode materials. However, severe volume swelling, poor conductivity, and slow Li+ diffusion kinetics are major obstacles to enhancing the electrochemical properties of silicon anodes. One-dimensional silicon nanowires with a high aspect ratio can effectively ameliorate these issues, while the complexity of the synthesis method limits its development. Here, a three-dimensional flexible electrode of binary-phase Ni-silicide foam loaded with silicon nanowires (NixSiy@Si NWs) was constructed in two simple steps: preparation of metal catalyst nanoparticles using a chemical plating approach and production of silicon nanowires by the supercritical fluid-liquid-solid mechanism. Benefiting from the excellent anchoring ability and superior electrical conductivity of NixSiy as well as the extra space and favorable Li+ and electrolyte diffusion paths provided by the Si NWs network, the as-obtained anode exhibits a high initial Coulombic efficiency of 77% at 0.5 A g-1, excellent cycling performance (a reversible capacity of 1238 mAh g(-1) after 200 cycles) and outstanding rate capability (2675, 2497, 2164, 1740, and 1222 mAh g(-1) at 0.5, 1, 2, 4, and 8 A g(-1), respectively).
引用
收藏
页码:6835 / 6844
页数:10
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