{"title":"Joint cationic and anionic redox chemistry in a vanadium oxide cathode for zinc batteries achieving high energy density","authors":"Wenfeng Wang, Lu Zhang, Zeang Duan, Ruyue Li, Jiajin Zhao, Longteng Tang, Yiming Sui, Yadi Qi, Shumin Han, Chong Fang, Desong Wang, Xiulei Ji","doi":"10.1002/cey2.577","DOIUrl":null,"url":null,"abstract":"Rechargeable aqueous zinc batteries are promising for large-scale energy storage due to their low cost and high safety; however, their energy density has reached the ceiling based on conventional cathodes with a single cationic redox reaction mechanism. Herein, a highly reversible cathode of typical layered vanadium oxide is reported, which operates on both the cationic redox couple of V<sup>5+</sup>/V<sup>3+</sup> accompanied by the Zn<sup>2+</sup> storage and the anionic O<sup>–</sup>/O<sup>2–</sup> redox couple by anion hosting in an aqueous deep eutectic solvent electrolyte. The reversible oxygen redox delivers an additional capacity of ∼100 mAh g<sup>–1</sup> at an operating voltage of ∼1.80 V, which increases the energy density of the cathode by ∼36%, endowing the cathode system a record high energy density of ∼506 Wh kg<sup>–1</sup>. The findings highlight new opportunities for the design of high-energy zinc batteries with both Zn<sup>2+</sup> and anions as charge carriers.","PeriodicalId":33706,"journal":{"name":"Carbon Energy","volume":"27 1","pages":""},"PeriodicalIF":19.5000,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbon Energy","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/cey2.577","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Rechargeable aqueous zinc batteries are promising for large-scale energy storage due to their low cost and high safety; however, their energy density has reached the ceiling based on conventional cathodes with a single cationic redox reaction mechanism. Herein, a highly reversible cathode of typical layered vanadium oxide is reported, which operates on both the cationic redox couple of V5+/V3+ accompanied by the Zn2+ storage and the anionic O–/O2– redox couple by anion hosting in an aqueous deep eutectic solvent electrolyte. The reversible oxygen redox delivers an additional capacity of ∼100 mAh g–1 at an operating voltage of ∼1.80 V, which increases the energy density of the cathode by ∼36%, endowing the cathode system a record high energy density of ∼506 Wh kg–1. The findings highlight new opportunities for the design of high-energy zinc batteries with both Zn2+ and anions as charge carriers.
期刊介绍:
Carbon Energy is an international journal that focuses on cutting-edge energy technology involving carbon utilization and carbon emission control. It provides a platform for researchers to communicate their findings and critical opinions and aims to bring together the communities of advanced material and energy. The journal covers a broad range of energy technologies, including energy storage, photocatalysis, electrocatalysis, photoelectrocatalysis, and thermocatalysis. It covers all forms of energy, from conventional electric and thermal energy to those that catalyze chemical and biological transformations. Additionally, Carbon Energy promotes new technologies for controlling carbon emissions and the green production of carbon materials. The journal welcomes innovative interdisciplinary research with wide impact. It is indexed in various databases, including Advanced Technologies & Aerospace Collection/Database, Biological Science Collection/Database, CAS, DOAJ, Environmental Science Collection/Database, Web of Science and Technology Collection.