J. Mater. Sci. Technol. ›› 2024, Vol. 177: 68-78.DOI: 10.1016/j.jmst.2023.09.001

• Research article • Previous Articles     Next Articles

Liquid-source plasma technology for construction of dual bromine-fluorine-enriched interphases on lithium metal anodes with enhanced performance

Ping Liua,b,c, Zhong Qiu a,b,c, Feng Caod, Yongqi Zhanga,e,*, Xinping Heb, Shenghui Shenf,*, Xinqi Liange,g, Minghua Cheng, Chen Wangh, Wangjun Wanh, Yang Xiab, Xinhui Xiaa,b,c,*, Wenkui Zhangb   

  1. aYangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313002, China;
    bCollege of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
    cSchool of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, China;
    dDepartment of Engineering Technology, Huzhou College, Huzhou 313000, China;
    eInstitute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu 611371, China;
    fSchool of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China;
    gKey Laboratory of Engineering Dielectric and Applications (Ministry of Education), School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China;
    hZhejiang Academy of Science and Technology for Inspection & Quarantine, Zhejiang Hangzhou 311215, China;
    iState Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350116, China
  • Received:2023-07-25 Revised:2023-09-05 Accepted:2023-09-05 Published:2024-04-01 Online:2024-03-25
  • Contact: *E-mail addresses: yqzhang@uestc.edu.cn (Y. Zhang), shensh_@zstu.edu.cn (S. Shen), helloxxh@zju.edu.cn (X. Xia)

Abstract: The electrochemical performance of Li metal anode is closely bound up with the interphase between Li and lithium-loaded skeleton as well as solid electrolyte interphase (SEI) on Li surface. Herein, for the first time, we propose a novel liquid-source CHBr2F plasma technology to simultaneously construct dual bromine-fluorine-enriched interphases: NiBr2-NiF2 interphase on sponge Ni (SN) skeleton and LiBr-LiF-enriched SEI on Li anode, respectively. Based on density functional theory (DFT) calculations and COMSOL multiphysics simulation results, SN skeleton with NiBr2-NiF2 interphase can effectively decrease the local current density with good lithiophilicity. And the LiBr-LiF-enriched SEI on Li surface can function to block electron tunneling and hinder side electrochemical reduction of electrolyte components, thus suppressing the growth of dendrite and facilitating the homogeneous transportation of lithium ions. Consequently, the Li/SN electrodes with modified interphases show remarkable stability with a low overpotential of 22.6 mV over 1800 h at 1 mA cm-2/1 mAh cm-2 and an exceptional average Coulombic efficiency of 99.6%. When coupled with LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode, the full cells deliver improved cycling stability with a capacity retention of 79.5% even after 350 cycles at 0.5 C. This study provides a facile and new plasma method for the construction of advanced Li anodes for energy storage.

Key words: Plasma, Solid electrolyte interphase, LiBr, LiF, Lithium metal anodes