A Flexible Solid Electrolyte Interphase Layer for Long‐Life Lithium Metal Anodes

Lithium (Li) metal is a promising anode material for high‐energy density batteries. However, the unstable and static solid electrolyte interphase (SEI) can be destroyed by the dynamic Li plating/stripping behavior on the Li anode surface, leading to side reactions and Li dendrites growth. Herein, we...

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Published inAngewandte Chemie International Edition Vol. 57; no. 6; pp. 1505 - 1509
Main Authors Li, Nian‐Wu, Shi, Yang, Yin, Ya‐Xia, Zeng, Xian‐Xiang, Li, Jin‐Yi, Li, Cong‐Ju, Wan, Li‐Jun, Wen, Rui, Guo, Yu‐Guo
Format Journal Article
LanguageEnglish
Published Germany Wiley Subscription Services, Inc 05.02.2018
EditionInternational ed. in English
Subjects
Anodes
Batteries
Dendrites
Elasticity
Electrode materials
Electrolytes
Flux density
in situ AFM
Interphase
Lithium
lithium dendrites
lithium ion batteries
lithium metal anodes
Polyacrylic acid
Polymers
Product safety
Side reactions
solid electrolyte interphase
Solid electrolytes
Stripping
lithium dendrites
lithium ion batteries
solid electrolyte interphase
in situ AFM
lithium metal anodes
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Summary:Lithium (Li) metal is a promising anode material for high‐energy density batteries. However, the unstable and static solid electrolyte interphase (SEI) can be destroyed by the dynamic Li plating/stripping behavior on the Li anode surface, leading to side reactions and Li dendrites growth. Herein, we design a smart Li polyacrylic acid (LiPAA) SEI layer high elasticity to address the dynamic Li plating/stripping processes by self‐adapting interface regulation, which is demonstrated by in situ AFM. With the high binding ability and excellent stability of the LiPAA polymer, the smart SEI can significantly reduce the side reactions and improve battery safety markedly. Stable cycling of 700 h is achieved in the LiPAA‐Li/LiPAA‐Li symmetrical cell. The innovative strategy of self‐adapting SEI design is broadly applicable, providing opportunities for use in Li metal anodes Stretching exercises: A flexible lithium polyacrylic acid (LiPAA) solid electrolyte interphase (SEI) layer which is highly stretchable is designed to address the dynamic volume changes during Li plating/stripping on the Li anode surface in Li ion batteries. The LiPAA polymer SEI can significantly reduce the side reactions and improve the safety performance.
Bibliography:These authors contributed equally to this work.
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ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.201710806