Defective ZnOx@porous carbon nanofiber network inducing dendrite-free zinc plating as zinc metal anode for high-performance aqueous rechargeable Zn/Na4Mn9O18 battery based on hybrid electrolyte
Song Y. Chen Y. Wang Z. Zhao W. Qin C. Yu H. Wang X. Bakenov Z. Zhang Y.
15 January 2022Elsevier B.V.
Journal of Power Sources
2022#518
Aqueous rechargeable batteries (ARBs) have appealed extensive research interests due to its superiorities of high safety, environmental protection and low redox potential. A Zn/Na4Mn9O18 ARB with metal Zn as anode, Na4Mn9O18 (NMO) as cathode and Na+/Zn2+ hybrid-ion as electrolytes has been the focus of attention in recent years. Nevertheless, serious dendrite formation and side reactions impede the application of a Zn anode and the development of the ARBs. In this study, an independent self-supporting defective ZnOx dispersed porous carbon nanofibers (ZnOx@PCNF) is designed as the main body of zinc metal anode to solve this problem. It is revealed from ab initio molecular dynamics simulation (AIMD) that ZnO with oxygen defect can promote the surfacely uniform Zn deposition. In this situation, the ZnOx@PCNF/Zn||Zn symmetrical battery shows high reversibility and free of Zn dendrites. A full cell is assembled by selecting the NMO cathode and ZnOx@PCNF/Zn anode, and it remains a high reversible capacity of 44.5 mAh g−1 after 200 cycles at 4 C, showing one of the best electrochemical performance of ARBs by using Zn-NMO system. The research has important guiding significance for design and fabricate of defects-containing materials and has a positive impact on the exploitation of high performance ARBs.
Aqueous rechargeable battery , Carbon nanofiber , Defect , Zinc anode , ZnO
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School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300401, China
Key Laboratory for New Type of Functional Materials in Hebei Province, Hebei University of Technology, Tianjin, 300401, China
Research Institute of Foundry, Hebei University of Technology, Tianjin, 300401, China
South China Academy of Advanced Optoelectronics & International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangzhou, 510006, China
Department of Chemical and Materials Engineering, National Laboratory Astana, Nazarbayev University, Institute of Batteries LLP, Nur-Sultan, 010000, Kazakhstan
School of Materials Science and Engineering
Key Laboratory for New Type of Functional Materials in Hebei Province
Research Institute of Foundry
South China Academy of Advanced Optoelectronics & International Academy of Optoelectronics at Zhaoqing
Department of Chemical and Materials Engineering
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