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Nano Research

Article Title

In situ fluorinated solid electrolyte interphase towards long-life lithium metal anodes

Authors

Shan-Min Xu, School of Science, Beijing Jiaotong University, Beijing 100044, China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China
Hui Duan, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Ji-Lei Shi, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Tong-Tong Zuo, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Xin-Cheng Hu, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Shuang-Yan Lang, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Min Yan, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China
Jia-Yan Liang, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Yu-Guo Yang, School of Science, Beijing Jiaotong University, Beijing 100044, China
Qing-Hua Kong, School of Science, Beijing Jiaotong University, Beijing 100044, China
Xing Zhang, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China
Yu-Guo Guo, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences and Beijing National Laboratory for Molecular Sciences (BNLMs), Institute of Chemistry, Chinese Academy of Science (CAS), Beijing 100190, China University of Chinese Academy of Sciences, Beijing 100049, China

Keywords

lithium metal batteries, artificial, in situ, solid electrolyte interphase, LiF

Abstract

The urgent demands for high-energy-density rechargeable batteries promote a flourishing development of Li metal anode. However, the uncontrollable dendrites growth and serious side reactions severely limit its commercial application. Herein, an artificial LiF-rich solid electrolyte interphase (SEI) is constructed at molecular-level using one-step photopolymerization of hexafluorobutyl acrylate based solution, where the LiF is in situ generated during photopolymerization process (denoted as PHALF). The LiF-rich layer comprised flexible polymer matrix and inorganic LiF filler not only ensures intimate contact with Li anode and adapts volume fluctuations during cycling but also regulates Li deposition behavior, enabling it to suppress the dendrite growth and block side reactions between the electrolyte and Li metal. Accordingly, the PHALF-Li anode presents superior stable cycling performance over 500 h at 1 mA·cm−2 for 1 mA·h·cm−2 without dendrites growth in carbonate electrolyte. The work provides a novel approach to design and build in situ artificial SEI layer for high-safety and stable Li metal anodes.

Graphical Abstract

Publisher

Tsinghua University Press

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