Directing lateral growth of lithium dendrites in micro-compartmented anode arrays for safe lithium metal batteries

Peichao Zou, Yang Wang, Sum-Wai Chiang, Xuanyu Wang, Feiyu Kang and Cheng Yang ()
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Peichao Zou: Tsinghua University
Yang Wang: Tsinghua University
Sum-Wai Chiang: Tsinghua University
Xuanyu Wang: Tsinghua University
Feiyu Kang: Tsinghua University
Cheng Yang: Tsinghua University

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Uncontrolled growth of lithium dendrites during cycling has remained a challenging issue for lithium metal batteries. Thus far, various approaches have been proposed to delay or suppress dendrite growth, yet little attention has been paid to the solutions that can make batteries keep working when lithium dendrites are already extensively present. Here we develop an industry-adoptable technology to laterally direct the growth of lithium dendrites, where all dendrites are retained inside the compartmented copper current collector in a given limited cycling capacity. This featured electrode layout renders superior cycling stability (e.g., smoothly running for over 150 cycles at 0.5 mA cm−2). Numerical simulations indicate that reduced dendritic stress and damage to the separator are achieved when the battery is abusively running over the ceiling capacity to generate protrusions. This study may contribute to a deeper comprehension of metal dendrites and provide a significant step towards ultimate safe batteries.

Date: 2018
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DOI: 10.1038/s41467-018-02888-8

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