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Highly Stable Aqueous Zinc‐Ion Storage Using a Layered Calcium Vanadium Oxide Bronze Cathode
Author(s) -
Xia Chuan,
Guo Jing,
Li Peng,
Zhang Xixiang,
Alshareef Husam N.
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201713291
Subject(s) - cathode , aqueous solution , vanadium , electrochemistry , vanadium oxide , anode , materials science , inorganic chemistry , electrolyte , bronze , zinc , energy storage , chemical engineering , oxide , chemistry , metallurgy , electrode , power (physics) , physics , quantum mechanics , engineering
Cost‐effective aqueous rechargeable batteries are attractive alternatives to non‐aqueous cells for stationary grid energy storage. Among different aqueous cells, zinc‐ion batteries (ZIBs), based on Zn 2+ intercalation chemistry, stand out as they can employ high‐capacity Zn metal as the anode material. Herein, we report a layered calcium vanadium oxide bronze as the cathode material for aqueous Zn batteries. For the storage of the Zn 2+ ions in the aqueous electrolyte, we demonstrate that the calcium‐based bronze structure can deliver a high capacity of 340 mA h g −1 at 0.2 C, good rate capability, and very long cycling life (96 % retention after 3000 cycles at 80 C). Further, we investigate the Zn 2+ storage mechanism, and the corresponding electrochemical kinetics in this bronze cathode. Finally, we show that our Zn cell delivers an energy density of 267 W h kg −1 at a power density of 53.4 W kg −1 .