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Morphological Reversibility of Modified Li-Based Anodes for Next-Generation Batteries
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posted on 2019-12-13, 13:10 authored by Fu Sun, Dong Zhou, Xin He, Markus Osenberg, Kang Dong, Libao Chen, Shilin Mei, André Hilger, Henning Markötter, Yan Lu, Shanmu Dong, Shashidhara Marathe, Christoph Rau, Xu Hou, Jie Li, Marian Cristian Stan, Martin Winter, Robert Dominko, Ingo MankeAlthough a great variety of strategies to suppress Li
dendrite
have been proposed for lithium metal batteries (LMBs), a deeper understanding
of the factors playing a crucial role during extended electrochemical
cycling is often lacking. Herein, the morphological reversibility
of the Li-based anode for next-generation batteries under three prevalent
strategies, i.e., the use of Li–Al alloys, polymer coating,
and anodic aluminum oxide (AAO) membrane attachment, has been sophisticatedly
investigated by nondestructive visualization. The characterizations
clearly capture the unprecedented morphological evolution of the Li-based
anode during the electrochemical cycling. Furthermore, the results
unambiguously indicate the formation of the “dead” electrochemically
generated porous structures regardless of >99% cycling efficiency
shown in Li symmetric cells in all three cell configurations. The
results presented here shed light on further understanding of the
morphological evolution of the Li anode under different scenarios,
and it also enlightens us on new research activities that may assist
in propelling the commercialization of LMBs.