RETRACTED ARTICLE: High-rate aluminium yolk-shell nanoparticle anode for Li-ion battery with long cycle life and ultrahigh capacity

Sa Li, Junjie Niu, Yu Cheng Zhao, Kang Pyo So, Chao Wang, Chang An Wang () and Ju Li ()
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Sa Li: State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
Junjie Niu: Massachusetts Institute of Technology
Yu Cheng Zhao: State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
Kang Pyo So: Massachusetts Institute of Technology
Chao Wang: Massachusetts Institute of Technology
Chang An Wang: State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University
Ju Li: Massachusetts Institute of Technology

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Alloy-type anodes such as silicon and tin are gaining popularity in rechargeable Li-ion batteries, but their rate/cycling capabilities should be improved. Here by making yolk-shell nanocomposite of aluminium core (30 nm in diameter) and TiO2 shell (∼3 nm in thickness), with a tunable interspace, we achieve 10 C charge/discharge rate with reversible capacity exceeding 650 mAh g−1 after 500 cycles, with a 3 mg cm−2 loading. At 1 C, the capacity is approximately 1,200 mAh g−1 after 500 cycles. Our one-pot synthesis route is simple and industrially scalable. This result may reverse the lagging status of aluminium among high-theoretical-capacity anodes.

Date: 2015
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DOI: 10.1038/ncomms8872

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