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A Synergistic Regulation of Electrolyte Environment and Anode Interface for Constructing Ultralong-Life Zn Metal Batteries with High Depth Discharge
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AI
C
F
王
D
X
J
DOI：10.1039/D5EE04445F.png)
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Abstract
En 中文
Organic additives are effective in solving the intractable problems of aqueous zinc-metal batteries (AZMBs). However; the structure design principles and structure-activity relationship of the additives are still elusive. Herein; a multifunctional bioorganic molecule additive; asparaginate (Asn); was introduced into the electrolyte to regulate the electrolyte environment and anode interface synergistically. The side reactions are effectively restrained by the well-controlled electrolyte pH with acid-base functional groups carried by Asn and the optimized solvation structures of Zn2+ with multiple zincophilic sites in Asn; as well as removing the excess active H2O from the inner Helmholtz plane to reconstruct the electric double layer with the spontaneous anchoring of Asn on anode; while the formation of Zn dendrites is also effectively inhibited with the unique self-anchoring effect of Asn on anode. Zn||Zn symmetric batteries deliver an ultra-long cycle life of 5700 h and sustain reversible Zn plating/stripping of 1000 h even with an extremely high depth of discharge of 85.47 %. Furthermore; Zn||MnO2 batteries and Zn||AC capacitors with designed electrolytes exhibit high capacity and cycling stability; providing a new design concept for excellent performance AZMBs and promising practical application potential.
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