Enhancing the interfacial between zinc anode and polymer electrolyte by single-ion cosolvent-based hydrogel electrolyte
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초록
내용
Aqueous zinc-ion batteries face challenges such as dendrite growth, hydrogen evolution reaction, and corrosion occurring on zinc metal surfaces. Herein, we prepared cosolvent-based single-ion conducting hydrogel electrolyte (CSHE) to suppress side reaction problem caused by water. The use of cosolvent (acetonitrile) and single ion (2-Acrylamido-2-methyl-1-propanesulfonic acid zinc salt) can enhance the dispersion of zinc ions and suppress the side reactions between water and the zinc anode. Half-cell using the CSHE exhibited a wide electrochemical stability window (2.6 V). A symmetric cell using the CSHE showed high critical current density (10 mA/cm2), along with a high zinc ion transference number (tZn2+=0.9). This research proposes a strategy for developing aqueous hydrogel electrolyte designs for stable zinc ion batteries by enhancing the interfacial between zinc anode and hydrogel electrolyte.