期刊
NANO ENERGY
卷 99, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2022.107331
关键词
Zinc anode; Redox kinetics; Interphase engineering; Nucleation; Hydrogen evolution reaction
类别
资金
- King Abdullah University of Science and Technology - King Abdulaziz Uni-versity (KAUST-KAU) Initiative [OSR-2018 KAUST-KAU-3903]
This study demonstrates an indium-coated carbon-zinc composite (ICZ) anode with outstanding cyclic stability in aqueous zinc batteries. By reducing the overpotential required for zinc nucleation and preventing parasitic reactions, the ICZ anode enhances the cyclic stability of zinc ion batteries and zinc ion capacitors.
Aqueous zinc batteries are among the most promising large-scale energy storage technologies but their practical application is hindered by the low redox reversibility of Zn anode in aqueous electrolytes. In this work, an indium-coated carbon-zinc composite (ICZ) anode is demonstrated with outstanding cyclic stability in classic aqueous zinc sulfate electrolytes. Compared with Zn and the carbon-zinc composite (CZ) anodes, the ICZ anode reduces the high overpotential required for Zn nucleation, and prevents high-rate HER and its related parasitic reactions, endowing high redox reversibility of the ICZ anode. Consequently, the ICZ anode enhances the cyclic stability of zinc ion batteries and zinc ion capacitors. The practical potential of the ICZ anode is demonstrated by an ICZ//porous carbon pouch cell delivering a high areal capacity of 4.7 mAh cm(-2) at 6 mA cm(-2). Our work provides an effective redox-kinetics regulation strategy for Zn anodes in aqueous zinc batteries.
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