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Synergistic engineering of the electric double layer and solid electrolyte interphase by a trace glutamate-derived additive for stable aqueous zinc-ion batteries
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DOI：10.1016/j.jechem.2025.12.019.png)
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Abstract
En 中文
Aqueous zinc-ion batteries (AZIBs) have garnered considerable attention as promising candidates for next-generation energy storage systems due to their inherent advantages. However, AZIBs have also constantly encountered interfacial challenges arising from the structure of the electric double layer (EDL) and the composition of the solid electrolyte interphase (SEI), fundamentally limiting their reversibility and cycling stability. Herein, we propose a novel trace additive strategy employing tetrasodium glutamate diacetate (TGD) to simultaneously reconstruct the EDL and form a stable SEI on the zinc anode surface. TGD molecules could preferentially adsorb on the zinc anode surface, which could displace water molecules from the inner Helmholtz plane (IHP) to reconstruct a water-deficient EDL and suppress hydrogen evolution reactions/water-induced parasitic reactions. Moreover, the adsorbed TGD molecules could also be involved in the formation of a stable organic–inorganic hybrid SEI, effectively stabilizing the anode/electrolyte interface, reducing interfacial impedance and facilitating uniform zinc deposition. Consequently, the symmetric cells deliver an outstanding cycling life of over 4800 h at 1 mA cm−2 and 1 mA h cm−2, and Zn||Cu cells achieve a high average Coulombic efficiency of 99.64 % for up to 2250 cycles. The Zn||PANI full cell with TGD-based electrolyte retains 91.32 % capacity after 2000 cycles at 3 A g−1. These findings highlight TGD-based interface engineering as a viable strategy for high-performance AZIBs.
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