Competitive Roles of Conductivity and Lithiophility in Composite Lithium Metal Anode
Tang W. Shen N. Xiong X. Liu H. Sun X. Guo J. Jiang F. Wang T. Ma Y. Zhong Y. He J. Zhu Z. Kong L. Kalimuldina G. Cheng X. Wu Y.
January 2024American Association for the Advancement of Science
Energy Material Advances
2024#5
For the three-dimensional conductive host, the uneven lithium deposition and the dependence on the pore structure and lithiophility are a great challenge for lithium metal anodes. Herein, we employed facial chemical etching techniques on brass foil to fabricate three-dimensional copper hosts with diverse pore structures and lithiophilities, thus intending to understand the lithium depositing mechanisms in porous hosts. The copper host with a more pronounced pore structure exhibits the lower polarization voltage induced by its large specific surface area, which reduces the local current density and provides a great deal of pathway for lithium ion diffusion. Meanwhile, it exhibits high nucleation overpotential and a short lifespan due to a reduced number of favorable lithium nucleation sites caused by the reduced lithiophilic zinc sites and a marked increase in the routes between nucleation sites. Therefore, the appropriate pore structure needs a consideration of efficient balance between the nucleation overpotential, the polarization voltage, and Coulombic efficiency. This insight underscores the pivotal role of well-suited pore structures in three-dimensional hosts, providing profound guidance for the efficient design of advanced host for lithium metal anode.
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Confucius Energy Storage Lab, School of Energy and Environment, Southeast University, Jiangsu, Nanjing, 211189, China
School of Chemistry and Materials Science, Nanjing University of Information Science and Technology, Jiangsu, Nanjing, 210044, China
Frontiers Science Center for Flexible Electronics, Xian Institute of Flexible Electronics, Northwestern Polytechnical University, Xian, 710129, China
Department of Mechanical and Aerospace Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave, 53, Astana, 010000, Kazakhstan
Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang, Jiangsu, 213300, China
Confucius Energy Storage Lab
School of Chemistry and Materials Science
Frontiers Science Center for Flexible Electronics
Department of Mechanical and Aerospace Engineering
Tianmu Lake Institute of Advanced Energy Storage Technologies
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