Electrodeposition of hydrated vanadium pentoxide on nanoporous carbon cloth for hybrid energy storage. Issue 3 (30th January 2018)

• Record Type: Journal Article
• Authors: Lee, Juhan; Badie, Sylvain; Srimuk, Pattarachai; Ridder, Alexander; Shim, Hwirim; Choudhury, Soumyadip; Nah, Yoon-Chae; Presser, Volker
• Is Part Of: Sustainable energy & fuels. Volume 2:Issue 3(2018)
• Page Start: 577
• Page End: 588
• Publication Date: 2018-01-30
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/c7se00559h
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : Electrodeposition is a simple and effective method for the synthesis of disordered hydrated vanadium pentoxide for energy storage applications. Abstract : Electrodeposition is a simple and effective method for the synthesis of disordered hydrated vanadium pentoxide (V2 O5 · n H2 O). For the synthesis of energy storage electrodes with high power performance, electrodeposition of hydrated V2 O5 inside carbon micropores is particularly attractive to synergize electric-double layer formation and lithium ion intercalation. Here, we demonstrate that hydrated V2 O5 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 V2 O5 . A thermal treatment after the electrodeposition is often used to enhance the crystal structure of hydrated V2 O5 . 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.