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Electrodeposition of hydrated vanadium pentoxide on nanoporous carbon cloth for hybrid energy storage

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Abstract

Electrodeposition is a simple and effective method for the synthesis of disordered hydrated vanadium pentoxide (V2O5·nH2O). For the synthesis of energy storage electrodes with high power performance, electrodeposition of hydrated V2O5 inside carbon micropores is particularly attractive to synergize electric-double layer formation and lithium ion intercalation. Here, we demonstrate that hydrated V2O5 can be effectively electrodeposited in carbon micropores of activated carbon cloth. Our study indicates that carbon pores larger than 1 nm are essential for the effective decoration with hydrated V2O5. A thermal treatment after the electrodeposition is often used to enhance the crystal structure of hydrated V2O5. However, thermal annealing of the hydrated vanadium pentoxide decorated activated carbon cloth under an oxygen-rich environment at high temperature (>330 °C) leads to a significant loss of pore volume, leading to a decreased electrochemical performance. At low annealing temperature (200 °C), the vanadium pentoxide electrodeposited activated carbon cloth electrode exhibits a maximum specific capacity of 137 mA h g−1 with stable cycle performance over 1600 cycles at a rate of 4C.

Graphical abstract: Electrodeposition of hydrated vanadium pentoxide on nanoporous carbon cloth for hybrid energy storage

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Publication details

The article was received on 17 Nov 2017, accepted on 10 Jan 2018 and first published on 10 Jan 2018


Article type: Paper
DOI: 10.1039/C7SE00559H
Citation: Sustainable Energy Fuels, 2018, Advance Article
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    Electrodeposition of hydrated vanadium pentoxide on nanoporous carbon cloth for hybrid energy storage

    J. Lee, S. Badie, P. Srimuk, A. Ridder, H. Shim, S. Choudhury, Y. Nah and V. Presser, Sustainable Energy Fuels, 2018, Advance Article , DOI: 10.1039/C7SE00559H

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