期刊
NATURE COMMUNICATIONS
卷 10, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-09510-5
关键词
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资金
- National Natural Science Foundation of China [51572100, 21875080, 51504171, 21703185, 61434001]
- Major Project of Technology Innovation of Hubei Province [2018AAA011]
- HUST Key Interdisciplinary Team Project [2016JCTD101]
- Wuhan Yellow Crane Talents Program
- City University of Hong Kong Applied Research Grant (ARG) [9667122]
- Hong Kong Research Grants Council (RGC) General Research Funds (GRF) [CityU 11205617]
Although silicon is a promising anode material for lithium-ion batteries, scalable synthesis of silicon anodes with good cyclability and low electrode swelling remains a significant challenge. Herein, we report a scalable top-down technique to produce ant-nest-like porous silicon from magnesium-silicon alloy. The ant-nest-like porous silicon comprising threedimensional interconnected silicon nanoligaments and bicontinuous nanopores can prevent pulverization and accommodate volume expansion during cycling resulting in negligible particle-level outward expansion. The carbon-coated porous silicon anode delivers a high capacity of 1,271 mAh g(-1) at 2,100 mA g(-1) with 90% capacity retention after 1,000 cycles and has a low electrode swelling of 17.8% at a high areal capacity of 5.1 mAh cm(-2). The full cell with the prelithiated silicon anode and Li(Ni1/3Co1/3Mn1/3)O-2 cathode boasts a high energy density of 502 Wh Kg(-1) and 84% capacity retention after 400 cycles. This work provides insights into the rational design of alloy anodes for high-energy batteries.
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