期刊
NANO RESEARCH
卷 9, 期 4, 页码 908-916出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-015-0973-x
关键词
porous; silicon; composite; lithium-ion batteries; dealloying
类别
资金
- National Natural Science Foundation of China [21401074, 21271085]
- Natural Science Foundation of Shandong Province [ZR2014BP013]
Nanoporous (NP) Si/Cu composites are fabricated by means of alloy refining followed by facile electroless dealloying in mild conditions. NP-Si/Cu composites with a three-dimensional porous network nanoarchitecture with different Cu contents are obtained by changing the feeding ratio of alloy precursors. Owing to the rich porosity and integration of conductive Cu into a nanoporous Si backbone, the NP-Si85Cu15 composite exhibits modified conductivity and reduced volumetric expansion/fracture during repeated charging-discharging processes in lithium-ion batteries (LIBs), thus exhibiting much higher cycling reversibility than NP-Si92Cu8 and pure NP-Si. With the advantages of unique performance and easy preparation, NP-Si/Cu composite has potential for application as an advanced anode material for LIBs.
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