Regulating coordination environment of vanadate cathode for ultralong lifespan zinc-ion batteries
Lv T. Li R. Yang L. Wang S. Zhu K. Wu J. Yao H. Li H. Toqtarhan K. Mi H. Pan A.
1 February 2026Elsevier B.V.
Chemical Engineering Journal
2026#529
In the field of Zn//vanadium-based aqueous batteries, many studies have focused on improving the stability of the cathode. However, its further application is still challenging due to the inferior structural stability and slow ion transfer kinetics. Herein, the V coordination environment is regulated by a novel pre-embedding strategy. A “zinc-rich” Zn3(OH)2V2O7·2H2O (ZVOH) phase is introduced into ZnV8O20·nH2O (ZVO) to construct a novel heterostructure with an enhanced V-O-V bond. ZVOH can serve as a stable framework to reduce the structural collapse of this vanadium composite during cycling. Moreover, theoretical calculations proved that the ZVO@ZVOH heterostructure can decrease the diffusion barriers of Zn2+ compared with those of ZVO. This study further employed a mixed solution of Zn(CF3SO3)2 and ZnSO4 as the electrolyte system, which effectively suppressed both vanadium dissolution and zinc dendrite growth. Benefiting from the optimised electrode structure design and synergistic effects of the electrolyte, the ZVO@ZVOH exhibits impressive 23,000 cycles (≈1300 h) ultra-stable cycling life at 6 A g−1, and a capacity retention of 75.3% after 1000 cycles (1100h) at 0.5 A g−1. In addition, the ZVO@ZVOH electrode displays a capacity of 244.7 mA h g−1 after 300 cycles, at 0.5 A g−1 with a high mass loading of 10.53 mg cm−2. This study offers new insights into the optimization strategy for superior long-lasting aqueous zinc ion batteries.
Heterostructure , Vanadate cathode , Vanadium coordination environment , Zinc ion battery
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Xinjiang Key Laboratory of Solid-State Physics and Devices, School of physics and technology, Xinjiang University, Urumqi, 830046, China
School of Materials Science and Engineering, Xinjiang Engineering Research Center of Environmental and Functional Materials, Xinjiang University, Xinjiang, Urumqi, 830046, China
China Institute of Energy Materials Science, University of Shanghai for Science and Technology, Shanghai, 200093, China
College of Modern Science and Technology, China Jiliang University, Jinhua, 322000, China
Educational Laboratory of Semiconductor Device Engineering, Faculty of Physics and Technology, Al Farabi Kazakh National University, Almaty, 050040, Kazakhstan
School of Chemical Engineering and Technology, Xinjiang University, Urumqi, 830046, China
School of Materials Science and Engineering, Central South University, Hunan, Changsha, 410083, China
Xinjiang Key Laboratory of Solid-State Physics and Devices
School of Materials Science and Engineering
China Institute of Energy Materials Science
College of Modern Science and Technology
Educational Laboratory of Semiconductor Device Engineering
School of Chemical Engineering and Technology
School of Materials Science and Engineering
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