Lou, J.; Zhou, J.; Ma, X.; Chen, K.; Chen, S. A Novel Sodium–Potassium Anode Supported by Fluorinated Aluminum Foam. Materials2023, 16, 7269.
Lou, J.; Zhou, J.; Ma, X.; Chen, K.; Chen, S. A Novel Sodium–Potassium Anode Supported by Fluorinated Aluminum Foam. Materials 2023, 16, 7269.
Lou, J.; Zhou, J.; Ma, X.; Chen, K.; Chen, S. A Novel Sodium–Potassium Anode Supported by Fluorinated Aluminum Foam. Materials2023, 16, 7269.
Lou, J.; Zhou, J.; Ma, X.; Chen, K.; Chen, S. A Novel Sodium–Potassium Anode Supported by Fluorinated Aluminum Foam. Materials 2023, 16, 7269.
Abstract
Sodium-potassium (NaK) liquid alloy is a promising candidate for use as anode material in sodium batteries because of its fluidity, which effectively suppresses the growth of sodium or potassium dendrites. However, the poor wettability of the NaK liquid alloy on conventional metal substrates is unfavorable for cell fabrication due to its strong surface tension. In this paper, low-density and low-cost fluorinated aluminum foam is used as a substrate support material for NaK liquid alloy. By combining low surface tension NaK@C with fluorinated aluminum foam, we obtain a uniformly distributed and structurally stable electrode material. The composite electrode has a cycling stability of more than 3000 hours in a symmetrical cell. Furthermore, when coupled with a sulfurized polyacrylonitrile cathode in carbonate electrolyte, it maintains excellent stability even after 800 cycles, with 72% of capacity retention.
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