Prioritized Na+ Adsorption‑Driven Cationic Electrostatic Repulsion Enables Highly Reversible Zinc Anodes at Low Temperatures (IMAGE)
Caption
- The introduction of low-cost, low-reduction-potential Na+ into aqueous Zn-based battery electrolytes suppresses Zn2+ aggregation at the anode interface through preferential Na+ adsorption and inter-cationic electrostatic repulsion, thereby enabling homogeneous Zn deposition and significantly enhanced low-temperature reversibility of Zn anodes.
- Na+ with low ionic potential spontaneously adsorbs at the anode–electrolyte interface, effectively reducing solvated water molecules and suppressing parasitic reactions, thus significantly improving the Coulombic efficiency of aqueous zinc metal batteries under low temperatures.
- At a low temperature of − 40 °C, the Zn||Zn cells maintained stable plating/stripping cycles for over 2500 h, and the Zn||PANI full cell exhibited excellent low-temperature performance with over 8000 charge–discharge cycles and a high capacity retention of more than 90%.
Credit
Guanchong Mao, Pan Xu, Xin Liu*, Xingyu Zhao, Zexiang Shen, Dongliang Chao, Minghua Chen*.
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