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Hybrid Electrospun Nanofibers as Electrocatalyst for Vanadium Redox Flow Batteries : Theory and Experiment

Title data

Maleki, Mahboubeh ; Tichter, Tim ; El‐Nagar, Gumaa A. ; Lauermann, Iver ; Roth, Christina:
Hybrid Electrospun Nanofibers as Electrocatalyst for Vanadium Redox Flow Batteries : Theory and Experiment.
In: ChemElectroChem. Vol. 8 (2021) Issue 1 . - pp. 218-226.
ISSN 2196-0216
DOI: https://doi.org/10.1002/celc.202001380

Abstract in another language

Selective modification of the morphology and intrinsic electrocatalytic activity of porous electrodes is urgently required to improve the performance of vanadium redox flow batteries (VRFBs). For this purpose, electrospinning was exploited to prepare high‐performance nanofiber‐based composites. Blends of polyacrylonitrile, polyacrylic acid, and polyaniline with carbon black were electrospun into a 3D free‐standing nanofibrous web, which was utilized as a novel electrode. By extending the recent theory of cyclic voltammetry at porous electrodes to account for interfacial double‐layer capacities, nonlinear effects of ohmic resistances, and parasitic reactions, we could quantitatively investigate non‐faradaic as well as desired and undesired faradaic current contributions. Combination of experimental and theoretical studies allowed a unique quantitative assessment of the intrinsic catalytic activity of selected electrode materials concerning the VO2+/VO2+ redox reaction.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Electrochemical Process Engineering > Chair Electrochemical Process Engineering - Univ.-Prof. Dr. Christina Roth
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 22 Apr 2021 07:06
Last Modified: 22 Apr 2021 07:06
URI: https://eref.uni-bayreuth.de/id/eprint/64860