Issue 46, 2023

Dense cuprous oxide sheath decorated three-dimensional copper foam enabling stable lithium metal anodes

Abstract

Uneven lithium deposition causing the growth of lithium dendrites is a major obstacle to the practical application of high-energy lithium metal batteries. In this study, a simple hydrothermal reaction is adopted to evenly coat copper foam (CF) with cuprous oxide particles. The resulting three-dimensional composite current collector can achieve dendrite-free lithium plating. Control experiments show that FeF3 is a better oxidant than FeCl3 for creating a more uniform and dense cuprous oxide coating on the CF. It is also found that the reaction temperature plays a crucial role in determining the thickness of the coating layer. Furthermore, the electrochemical experimental results confirm that a dense and uniform coating layer with an appropriate thickness is essential in achieving high coulombic efficiency (CE) for CF current collectors. The CF with the optimal coating exhibits only a small nucleation overvoltage (15 mV) and high CE (98% retention after 120 cycles) at a current density of 1.0 mA cm−2 and a Li deposition of 1.0 mA h cm−2 in an ether electrolyte without lithium nitrate.

Graphical abstract: Dense cuprous oxide sheath decorated three-dimensional copper foam enabling stable lithium metal anodes

Supplementary files

Article information

Article type
Paper
Submitted
19 iyl 2023
Accepted
26 sen 2023
First published
08 noy 2023

J. Mater. Chem. A, 2023,11, 25455-25464

Dense cuprous oxide sheath decorated three-dimensional copper foam enabling stable lithium metal anodes

C. Liu, B. Wu, Y. Zhang, T. Liu, J. Cui, L. Huang, G. Tan, L. Zhang, Y. Su and F. Wu, J. Mater. Chem. A, 2023, 11, 25455 DOI: 10.1039/D3TA04259F

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