Journal of Inorganic Materials ›› 2020, Vol. 35 ›› Issue (8): 882-888.DOI: 10.15541/jim20190545

Special Issue: 能源材料论文精选(二):超级电容器与储能电池(2020) 【虚拟专辑】锂金属电池,钠离子电池和水系电池(2020~2021)

• RESEARCH PAPER • Previous Articles     Next Articles

Stable Li-metal Depositon on Lithiophilic 3D CuO Nanosheet-decorated Cu Mesh

LI Rui1(),WANG Hao1,FU Qiang2,TIAN Ziyu1,WANG Jianxu3,MA Xiaojian1,YANG Jian1,QIAN Yitai1,4   

  1. 1. Key Laboratory for Colloid and Interface Chemistry Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
    2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
    3. State Key Laboratory of Crystal Materials, School of Physics, Shandong University, Jinan 250100, China
    4. Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei 230026, China
  • Received:2019-10-24 Revised:2020-02-05 Published:2020-08-20 Online:2020-03-03
  • Supported by:
    National Natural Science Foundation of China(21471090);National Natural Science Foundation of China(61527809);Taishan Scholarship in Shandong Provinces(ts201511004)


Lithium metal anode, due to its highest theoretical specific capacity (3860 mAh·g -1) and lowest electrochemical potential (-3.04 V (vs SHE)), has become the first choice of the next generation of electrochemical energy storage devices. It is known as the “holy grail” of the battery industry. However, the disadvantage of lithium metal battery is particularly obvious: during the charge and discharge process, lithium metal battery is easy to deposit unevenly on the anode electrode, resulting in lithium dendrite which causes the continuous rupture and formation of solid electrolyte interface (SEI) film. The unstable SEI film, intensifying the formation of lithium dendrites and then piercing the separator, causes a decline for the battery cycle performance and the safety hazard. Therefore, it is particularly important to take corresponding measures to make lithium metal uniformly deposited on the anode. In this study, the uniform lithiophilic copper oxide nanosheet array formed on the surface of commercial copper mesh through oxidation of alkaline solvent and calcination of air. The 3D structure of copper mesh can effectively reduce the current density, and the lithiophilic nanosheet array can effectively reduce the overpotential of lithium deposition simultaneously. This lithiophilic 3D copper-based current collector makes lithium deposited uniformly and effectively, and inhibits the formation of lithium dendrites. In the half-cell test at a current density of 3 mA·cm -2 the battery circulated stably for 230 cycles with Coulombic efficiency remaining above 99%. The lithium iron phosphate (LFP) full battery with the as-prepared material as current collector worked stably for more than 300 cycles at 1C(0.17 mA·mg -1) and present a capacity retention of ~95%. This study provides a new design strategy of 3D current collector for stable lithium metal batteries.

Key words: 3D Cu current collector, CuO nanosheet array, surface engineering, lithium metal anode, lithium metal battery

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