Journal of Energy Chemistry ›› 2023, Vol. 79 ›› Issue (4): 390-397.DOI: 10.1016/j.jechem.2023.01.030

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Full-chain enhanced ion transport toward stable lithium metal anodes

Yuliang Gaoa,b, Fahong Qiaoa, Nan Lia,c,*, Jingyuan Youa, Yong Yanga, Jun Wanga, Chao Shena, Ting Jina, Xi Lid,*, Keyu Xiea,*   

  1. aState Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi’an 710072, Shaanxi, China;
    bSchool of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, Inner Mongolia, China;
    cDepartment of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, China;
    dShanghai Key Lab of Advanced High-temperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2022-11-25 Revised:2022-12-27 Accepted:2023-01-16 Online:2023-04-15 Published:2023-05-30
  • Contact: * E-mail addresses: nan1li@polyu.edu.hk (N. Li), lx_net@sina.com (X. Li), kyx-ie@nwpu.edu.cn (K. Xie).

Abstract: The dendrite growth that results from the slow electrode process kinetics prevents the lithium (Li) metal anode from being used in practical applications. Here, full-chain enhanced ion transport for stabilizing Li metal anodes is proposed. Experimental and theoretical studies confirm that full-chain enhanced ion transport (electrocrystallization, mass transport in the electrolyte and diffusion in solid electrolyte inter-phase) under magnetoelectrochemistry contributes to a homogeneous, dense, and dendrite-free mor-phology. Specifically, the enhanced electrocrystallization behavior promotes the Li nucleation; the enhanced mass transport in the electrolyte alleviates the ion concentration gradient at the electrode sur-face, which helps to inhibit dendrite growth; and the enhanced diffusion in the solid electrolyte inter-phase further homogenizes the Li deposition behavior, obtaining regular and uniform Li particles. Consequently, the Li metal anode has exceptional cycling stability in both symmetric and full cells, and the pouch cell performs long cycles (170 cycles) in practice evaluation. This work advances funda-mental knowledge of the magneto-dendrite effect and offers a new perspective on stabilizing metal anodes.

Key words: Lithium metal anodes, Ion transport, Pouch cell, Lithium dendrites, Magnetic field