%0 Journal Article
%A Park, Minjoon
%A Jung, Yang-jae
%A Kim, Jungyun
%A Lee, Ho il
%A Cho, Jeaphil
%D 2016
%T Synergistic Effect of Carbon Nanofiber/Nanotube Composite
Catalyst on Carbon Felt Electrode for High-Performance All-Vanadium
Redox Flow Battery
%U https://acs.figshare.com/articles/journal_contribution/Synergistic_Effect_of_Carbon_Nanofiber_Nanotube_Composite_Catalyst_on_Carbon_Felt_Electrode_for_High_Performance_All_Vanadium_Redox_Flow_Battery/2368303
%R 10.1021/nl402566s.s001
%2 https://acs.figshare.com/ndownloader/files/4007755
%K vanadium redox flow battery
%K electron transfer rate
%K edge plane
%K mA
%K Carbon Felt Electrode
%K surface defect sites
%K energy efficiency
%K electrode materials
%K acetylene gas
%K CF electrode
%K Synergistic Effect
%K discharge capacity
%K Ni catalysts
%K CNT
%K electrocatalytic properties
%K VO
%K CNF
%K cell exhibits
%X Carbon
nanofiber/nanotube (CNF/CNT) composite catalysts grown on
carbon felt (CF), prepared from a simple way involving the thermal
decomposition of acetylene gas over Ni catalysts, are studied as electrode
materials in a vanadium redox flow battery. The electrode with the
composite catalyst prepared at 700 °C (denoted as CNF/CNT-700)
demonstrates the best electrocatalytic properties toward the V2+/V3+ and VO2+/VO2+ redox couples among the samples prepared at 500, 600, 700, and 800
°C. Moreover, this composite electrode in the full cell exhibits
substantially improved discharge capacity and energy efficiency by
∼64% and by ∼25% at 40 mA·cm–2 and 100 mA·cm–2, respectively, compared to
untreated CF electrode. This outstanding performance is due to the
enhanced surface defect sites of exposed edge plane in CNF and a fast
electron transfer rate of in-plane side wall of the CNT.
%I ACS Publications