WangBaoChemistryHybridRedox-Supercapacitor.pdf

Citeable URL: https://ir.library.oregonstate.edu/concern/articles/2r36v038z

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Creator	Wang, B. Maciá-Agulló, J. A. Prendiville, D. G. Zheng, X. Liu, D. Zhang, Y. Boettcher, S. W. Ji, X. Stucky, G. D.
Abstract	A significant challenge for energy storage technologies is to realize battery-level energy density and capacitor-level durability and power density in one device. By introducing an electrolyte composed of an anionic catholyte and a cationic anolyte into a symmetric carbon-based supercapacitor configuration, a hybrid electrochemical battery-supercapacitor system using soluble redox species delivers significantly improved energy density from 20 to 42 W•h/kg (based on the electrode mass) and stable capacities for > 10⁴ cycles. The ionic species formed in the electrolyte are studied by UV-Vis, Raman and mass spectroscopy to probe the energy storage mechanism. The strategy is general and may provide a route to critically-needed fast-charging devices with both high energy density and power. Keywords: Energy storage, Electrochemical capacitors Keywords: Energy storage, Electrochemical capacitors
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2017-07-26

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