Synergistic Effect of Carbon Nanofiber/Nanotube Composite
Catalyst on Carbon Felt Electrode for High-Performance All-Vanadium
Redox Flow Battery
Minjoon Park
Yang-jae Jung
Jungyun Kim
Ho il Lee
Jeaphil Cho
10.1021/nl402566s.s001
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
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 V<sup>2+</sup>/V<sup>3+</sup> and VO<sup>2+</sup>/VO<sub>2</sub><sup>+</sup> 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<sup>–2</sup> and 100 mA·cm<sup>–2</sup>, 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.
2016-02-18 17:06:23
vanadium redox flow battery
electron transfer rate
edge plane
mA
Carbon Felt Electrode
surface defect sites
energy efficiency
electrode materials
acetylene gas
CF electrode
Synergistic Effect
discharge capacity
Ni catalysts
CNT
electrocatalytic properties
VO
CNF
cell exhibits