Hierarchical porous silicon structures with extraordinary mechanical strength as high-performance lithium-ion battery anodes

Haiping Jia, Xiaolin Li (), Junhua Song, Xin Zhang, Langli Luo, Yang He, Binsong Li, Yun Cai, Shenyang Hu, Xingcheng Xiao, Chongmin Wang, Kevin M. Rosso, Ran Yi, Rajankumar Patel and Ji-Guang Zhang ()
Additional contact information
Haiping Jia: Pacific Northwest National Laboratory
Xiaolin Li: Pacific Northwest National Laboratory
Junhua Song: Pacific Northwest National Laboratory
Xin Zhang: Pacific Northwest National Laboratory
Langli Luo: Pacific Northwest National Laboratory
Yang He: Pacific Northwest National Laboratory
Binsong Li: General Motors Research and Development Center
Yun Cai: Pacific Northwest National Laboratory
Shenyang Hu: Pacific Northwest National Laboratory
Xingcheng Xiao: General Motors Research and Development Center
Chongmin Wang: Pacific Northwest National Laboratory
Kevin M. Rosso: Pacific Northwest National Laboratory
Ran Yi: Pacific Northwest National Laboratory
Rajankumar Patel: Pacific Northwest National Laboratory
Ji-Guang Zhang: Pacific Northwest National Laboratory

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Porous structured silicon has been regarded as a promising candidate to overcome pulverization of silicon-based anodes. However, poor mechanical strength of these porous particles has limited their volumetric energy density towards practical applications. Here we design and synthesize hierarchical carbon-nanotube@silicon@carbon microspheres with both high porosity and extraordinary mechanical strength (>200 MPa) and a low apparent particle expansion of ~40% upon full lithiation. The composite electrodes of carbon-nanotube@silicon@carbon-graphite with a practical loading (3 mAh cm−2) deliver ~750 mAh g−1 specific capacity, 92% capacity retention over 500 cycles. This work is a leap in silicon anode development and provides insights into the design of electrode materials for other batteries.

Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15217-9

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DOI: 10.1038/s41467-020-15217-9

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