能源化学(英文版)

能源化学(英文版) ›› 2020, Vol. 49 ›› Issue (10): 59-70.DOI: 10.1016/j.jechem.2020.01.013

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A systematical study on the electrodeposition process of metallic lithium

Hailin Fan, Chunhui Gao, Huai Jiang, Qingyuan Dong, Bo Hong, Yanqing Lai   

  1. School of Metallurgy and Environment,Central South University,Changsha 410083,Hunan,China
  • 收稿日期:2019-12-11 修回日期:2020-01-17 出版日期:2020-10-15 发布日期:2020-12-18
  • 通讯作者: Bo Hong, Yanqing Lai
  • 基金资助:
    We thank the National Natural Science Foundation of China(No.51874361)and the National Natural Science Foundation of China Youth Fund(51904343)for supporting this work.

A systematical study on the electrodeposition process of metallic lithium

Hailin Fan, Chunhui Gao, Huai Jiang, Qingyuan Dong, Bo Hong, Yanqing Lai   

  1. School of Metallurgy and Environment,Central South University,Changsha 410083,Hunan,China
  • Received:2019-12-11 Revised:2020-01-17 Online:2020-10-15 Published:2020-12-18
  • Contact: Bo Hong, Yanqing Lai
  • Supported by:
    We thank the National Natural Science Foundation of China(No.51874361)and the National Natural Science Foundation of China Youth Fund(51904343)for supporting this work.

摘要： In this study,commercial copper (Cu) foil and Cu foam are used as the working electrodes to systematically investigate the electrochemical deposition and dissolution processes of metallic lithium (Li) on these electrodes;Li metal deposited on the Cu foil electrode is porous and loose.The surface solid electrolyte interface (SEI) film after dissolution from Li dendrites maintains a dendritic porous structure,resulting in a large volume effect of the electrode during the cycle.The Cu foam electrode provides preferential nucleation and deposition sites near the side surface of the separator;the difference in Li affinity results in a heterogeneous deposition and dendrite growth of metallic Li.

关键词: Deposition behavior, Deposition overpotential, Dendrite growth, Selective deposition, Interface impedance

Abstract: In this study,commercial copper (Cu) foil and Cu foam are used as the working electrodes to systematically investigate the electrochemical deposition and dissolution processes of metallic lithium (Li) on these electrodes;Li metal deposited on the Cu foil electrode is porous and loose.The surface solid electrolyte interface (SEI) film after dissolution from Li dendrites maintains a dendritic porous structure,resulting in a large volume effect of the electrode during the cycle.The Cu foam electrode provides preferential nucleation and deposition sites near the side surface of the separator;the difference in Li affinity results in a heterogeneous deposition and dendrite growth of metallic Li.

Key words: Deposition behavior, Deposition overpotential, Dendrite growth, Selective deposition, Interface impedance