Regensburg 2022 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 8: Materials for Storage and Conversion of Energy

MM 8.6: Vortrag

Montag, 5. September 2022, 17:15–17:30, H46

Cu2+ Intercalated Vanadium Pentoxide Grown on Carbon Cloth as Binder-Free Cathodes for Reversible Aqueous Zinc Ion Batteries — •Ping Hong^1,2, Yude Wang², Huaping Zhao¹, and Yong Lei¹ — ¹Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693 Ilmenau, Germany — ²School of Materials Science and Engineering, Yunnan University, Kunming, People's Republic of China

Aqueous zinc batteries (ZIBs) with low cost, safety, environmentally friendly, and high theoretical capacity are a promising electrochemical energy storage technology. Vanadium based materials have been widely studied as cathode materials for ZIBs because of their safety, diverse crystal structure, abundant resources, low cost and high theoretical capacity. In the reported cathode materials, the mass loading of the cathode is usually less than 4 mg/cm2 is not sufficient enough for practical applications. Herein, Cu2+ intercalated vanadium pentoxide (CVOH@CC) with high loading (~7 mg/cm2) were directly grown on carbon cloth via hydrothermal method. The as-prepared CVOH@CC has a distinct 3D interconnected nested structure. When applying as binder-free cathode for ZIBs, CVOH@CC electrodes exhibited a high capacity of 223.4 mAh/g at 1.0 A/g and a long cycling performance of over 2000 cycles. The intercalation resulted in a better capacitive response and faster diffusion rate for the cathode compared to pure vanadium pentoxide (VOH@CC), which means better rate performance and cycling stability, providing a viable design proposal for the production of industrial grade ZIBs.