Electrochemical evaluation methods of vanadium flow battery electrodes
Literature Information
Publication Date
2017-05-09
DOI
10.1039/C7CP02581E
Impact Factor
3.676
Authors
Lantao Wu, Jianshe Wang, Yi Shen, Le Liu, Jingyu Xi
View Original
Abstract
Various testing methods, such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), have been employed to evaluate the electrode performance of vanadium flow batteries (VFB). Due to the variations in the testing devices and characterization parameters in the literature, a number of reported results are incomparable and even sometimes contradictory. In this report, a reliable device is proposed for the electrochemical characterization of electrode materials, and the parameter selection was demonstrated to be critical for achieving reliable evaluation and reducing the effects of side reactions. As for the structure of the graphite felt electrode, volume current density is proposed to replace the area current density as the main evaluation indicator. Furthermore, the effect of side reactions is discussed and the upper limit voltage of 1.60 V is found to be suitable in the charge process of VFB since selecting this value can greatly protect the active sites on the electrode and avoid the capacity fading caused by side reactions.
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Source Journal
Physical Chemistry Chemical Physics
CiteScore:
5.5
Self-citation Rate:
10.3%
Articles per Year:
3036
Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.
Recommended Compounds
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N-[(1S,2R,4S)-2-Amino-4-(dimethylcarbamoyl)cyclohexyl]-N'-(5-chloro-2-pyridinyl)ethanediamide
CAS Number:
480452-37-7
Molecular Formula:
C16H22ClN5O3
2-Methyl-2-propanyl (3R,5S)-6-chloro-3,5-dihydroxyhexanoate
CAS Number:
154026-93-4
Molecular Formula:
C10H19ClO4
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