Electrochemical Diagram of an Ultrathin Lithium Metal Anode in Pouch Cells

Advanced Materials
Peng ShiQiang Zhang

Abstract

Lithium (Li) metal is regarded as a "Holy Grail" electrode for next-generation high-energy-density batteries. However, the electrochemical behavior of the Li anode under a practical working state is poorly understood, leading to a gap in the design strategy and the aim of efficient Li anodes. The electrochemical diagram to reveal failure mechanisms of ultrathin Li in pouch cells is demonstrated. The working mode of the Li metal anode ranging from 1.0 mA cm-2 /1.0 mAh cm-2 (28.0 mA/28.0 mAh) to 10.0 mA cm-2 /10.0 mAh cm-2 (280.0 mA/280.0 mAh) is investigated and divided into three categories: polarization, transition, and short-circuit zones. Powdering and the induced polarization are the main reasons for the failure of the Li electrode at small current density and capacity, while short-circuit occurs with the damage of the separator leading to safety concerns being dominant at large current and capacity. The electrochemical diagram is attributed from the distinctive plating/stripping behaviors of Li metal, accompanied by dendrites thickening and/or lengthening, and heterogeneous distribution of dendrites. A clear understanding in the electrochemical diagram of ultrathin Li is the primary step to rationally design an effective L...Continue Reading

References

Feb 26, 2016·Science·M R Palacín, A de Guibert
Nov 3, 2016·Journal of the American Chemical Society·Wei LiuYi Cui
Mar 8, 2017·Nature Nanotechnology·Dingchang LinYi Cui
Jul 29, 2017·Chemical Reviews·Xin-Bing ChengQiang Zhang
Jun 28, 2018·Angewandte Chemie·Quan PangLinda F Nazar
Sep 5, 2018·ChemSusChem·Hongkyung LeeJi-Guang Zhang
Sep 28, 2018·Advanced Materials·Chong YanQiang Zhang
Oct 29, 2018·Advanced Materials·Rodrigo V SalvatierraJames M Tour
Nov 30, 2018·Nano Letters·Wooseok GoHyun-Wook Lee
Dec 6, 2018·Advanced Materials·Weidong ZhouJohn B Goodenough

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Citations

Feb 27, 2020·Chemical Communications : Chem Comm·Qing YangGuang He
Dec 15, 2020·Advanced Materials·Zhi Yong WangZi Ping Wu
Jan 13, 2021·Advanced Materials·Xiao-Ru ChenQiang Zhang
Jan 1, 2021·ACS Applied Materials & Interfaces·Yikang YuJian Xie

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