Titanium carbide-decorated graphite felt as high performance negative electrode in vanadium redox flow batteries

Abstract

Binder free titanium carbide decorated graphite felt as high performance negative electrode in vanadium redox flow battery.

Preparation of a porous graphite felt electrode for advance vanadium redox flow batteries

“…At present, the graphite felts are widely applied as electrode materials for VRFBs owing to their great stability and high conductivity under concentrated acidic conditions. 3 Their low catalytic activity and low specic surface area cannot facilitate and promote the redox process. Thus, various electrocatalysts are utilized to modify GF to enhance the redox process.…”

Finite Heterogeneous Rate Constants for the Electrochemical Oxidation of VO2+ at Glassy Carbon Electrodes

“…In vanadium redox flow battery (VRFB) research, stationary 1 linear sweep voltammetry (S-LSV) and stationary cyclic voltammetry (S-CV) are the most prevalent techniques used for the fast assessment of the kinetic performance of surface-modified carbon felt electrodes, and numerous studies have been published on that topic (Flox et al, 2013a,b;Gao et al, 2013;Hammer et al, 2014;Suárez et al, 2014;Liu et al, 2015;Park and Kim, 2015;He et al, 2016He et al, , 2018Kim et al, 2016;Park et al, 2016;Ryu et al, 2016;Zhang et al, 2016;González et al, 2017;Jiang et al, 2017;Ghimire et al, 2018;Xiang and Daoud, 2019;Yang et al, 2019). However, regarding the complex diffusion domain inside a felt electrode, the common approach of relating the peak-to-peak separation of an S-CV curve to the electrodes' kinetics (valid for a planar electrode in semi-infinite diffusion space only; Matsuda and Ayabe, 1954;Nicholson and Shain, 1964;Nicholson, 1965) does not seem to be appropriate.…”

Electrocatalytic performance of TiO 2 with different phase state towards V 2+ /V 3+ reaction for vanadium redox flow battery

“…In recent years, titanium‐based compounds (such as TiC, TiN, TiO 2 ) have showed superb electrocatalytic properties for negative couple of VRFB, on which researchers have increasingly focused. Yan et al synthesized titanium carbide nanoparticles supported on graphite felt as negative electrode utilizing hydrothermal synthesis and subsequent carbothermal reaction, which leads to high energy efficiency and stability of VRFB. Xiang et al employed TiN nanoparticles as catalyst for negative electrode, showing lower charge transfer resistance and significant improvement of electrocatalytic activity for single VRFB cell.…”