PbO2-modified graphite felt as the positive electrode for an all-vanadium redox flow battery

Wu, Xiaoxin; Xu, Hongyao; Lu, Lu; Zhao, Hong; Fu, Jie; Shen, Yang; Xu, Ping; Dong, Yiming

doi:10.1016/j.jpowsour.2013.11.021

Cited by 178 publications

(87 citation statements)

References 23 publications

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“…5a, displaying the reduction and oxidation peaks corresponding to VO 2+ ↔VO2 + couple at approximately 0.62 and 1.1 V, respectively which is in agreement with previous work [31]. Fig.…”

Section: Electrochemical Characterization Resultssupporting

confidence: 92%

“…Among potential electrocatalysts, metal dopants and nanoparticles followed by metal oxides (in efforts to reduce cost) were investigated [30][31][32]. However, the presence of rare or expensive metal containing precursors ultimately necessitates a move toward earth abundant electrocatalysts namely carbon based ones such as carbon nanotubes [32], nanofibers [33,34], and graphene oxide [35].…”

Section: Introductionmentioning

confidence: 99%

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Properties of mesoporous carbon modified carbon felt for anode of all-vanadium redox flow battery

Schmidt

Cao

2016

Sci. China Mater.

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A novel anode material for all-vanadium redox flow battery was synthesized by dispersion coating of sol-gel processed (resorcinol-furaldehyde) mesoporous carbon (MPC) onto the surface of polyacrylonitrile carbon felt (CF). The coated samples were then annealed at 900°C and 1100°C and the subsequent morphology, surface chemistry, and electrochemical properties of the MPC coated CF were characterized and compared with an uncoated CF. Addition of the MPC coating is shown to dramatically increase surface area while also increasing the number of active surface oxygen groups particularly for samples annealed at 1100°C. MPC coating shows a mixed effect on electrochemical properties. Characterization with cyclic voltammetry reveals the introduction of MPC coating provides roughly 30% increase in peak current density for the oxidation and reduction reactions of the V(IV)/V(V ) redox couple, which is attributed to the significantly increased number of active reaction sites. However, MPC coating seems to be accompanied by a reduction in conductivity as demonstrated by increased redox peak separation and charge transfer resistance. This negative effect on conductivity can be mitigated by heat treatment (at or above 1100°C) which improves surface graphitization reducing redox peak separation and charge transfer resistance such that it is comparable with uncoated samples.

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“…5a, displaying the reduction and oxidation peaks corresponding to VO 2+ ↔VO2 + couple at approximately 0.62 and 1.1 V, respectively which is in agreement with previous work [31]. Fig.…”

Section: Electrochemical Characterization Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Properties of mesoporous carbon modified carbon felt for anode of all-vanadium redox flow battery

Schmidt

Cao

2016

Sci. China Mater.

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“…For example, MWCNTs [5], graphene nanosheets and carbon nanofibers [6,7], functionalization of carbon surface as N-and Ocontaining groups [8], metals such as Pt [6], Ir [9] and Bi [10] and metal oxides Mn 3 O 4 [11,12], WO 3 [13,14], TiO 2 [15], CeO 2 [16], PbO 2 [17], and Nb 2 O 5 [18] were deposited onto the CF supports to prepare modified electrodes. However, although all this research demonstrated an improvement in electrochemical kinetics, the enhanced power density is rarely discussed in the literature as a complementary performance evaluation to the charge/discharge experiments.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

High-power positive electrode based on synergistic effect of N- and WO3 -decorated carbon felt for vanadium redox flow batteries

Hosseini

Mousavihashemi

Murcia-López

et al. 2018

Carbon

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Although Vanadium Redox Flow Battery (VRFB) is well suitable for grid-scale application, their power-related cost must be reduced in order to boost the technology to the market, allowing their widespread commercialization. One effective way to make the VRFB a competitive and viable solution could be through the new strategies for improving the electrocatalytic activity of the electrodes with enhanced electrolyte/electrode interface characteristics. The greatly effective and enhanced-electron transfer could increase the current density with the decrement of the stack size. Herein, we report the synergistic effect demonstrated by N-and WO 3 -decorated carbon-based positive electrode, named HTNW electrode, which demonstrates the feasibility of achieving: i) enhanced electrocatalytic activity, indicating high rate towards VO 2+ /VO 2 + couple (promotion of oxygen and electron transfer processes), ii) decrement of the electron-transfer resistance from 75.62 Ω to 12.4 Ω for the pristine electrode and HTNW electrodes, respectively; iii) 51% of the electrolyte utilization ratio at high rates (i.e. 200 mA cm -2 ) with 70% of energy efficiency ; iv) increment of more than 50% of the power-peak in comparison with HT electrode.

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“…Furthermore, the transition metals such as Pb, Bi, W and Ir were also modified on the carbon nanofibers by chemical impregnation or the electrodeposition method [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Effect of the graphitization degree for electrospun carbon nanofibers on their electrochemical activity towards VO2+/VO2+ redox couple

Wei

et al. 2016

Electrochimica Acta

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PbO2-modified graphite felt as the positive electrode for an all-vanadium redox flow battery

Cited by 178 publications

References 23 publications

Properties of mesoporous carbon modified carbon felt for anode of all-vanadium redox flow battery

Properties of mesoporous carbon modified carbon felt for anode of all-vanadium redox flow battery

High-power positive electrode based on synergistic effect of N- and WO3 -decorated carbon felt for vanadium redox flow batteries

Effect of the graphitization degree for electrospun carbon nanofibers on their electrochemical activity towards VO2+/VO2+ redox couple

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