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Title: The cell-in-series method: A technique for accelerated electrode degradation in redox flow batteries

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0251601jes· OSTI ID:1324215
 [1];  [2];  [2];  [1];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Here we demonstrate a novel method to accelerate electrode degradation in redox flow batteries and apply this method to the all-vanadium chemistry. Electrode performance degradation occurred seven times faster than in a typical cycling experiment, enabling rapid evaluation of materials. This method also enables the steady-state study of electrodes. In this manner, it is possible to delineate whether specific operating conditions induce performance degradation; we found that both aggressively charging and discharging result in performance loss. Post-mortem x-ray photoelectron spectroscopy of the degraded electrodes was used to resolve the effects of state of charge (SoC) and current on the electrode surface chemistry. For the electrode material tested in this work, we found evidence that a loss of oxygen content on the negative electrode cannot explain decreased cell performance. Furthermore, the effects of decreased electrode and membrane performance on capacity fade in a typical cycling battery were decoupled from crossover; electrode and membrane performance decay were responsible for a 22% fade in capacity, while crossover caused a 12% fade.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); US Department of the Navy, Office of Naval Research (ONR)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1324215
Alternate ID(s):
OSTI ID: 1337483
Journal Information:
Journal of the Electrochemical Society, Vol. 163, Issue 1; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 49 works
Citation information provided by
Web of Science

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Cited By (14)

A review of all‐vanadium redox flow battery durability: Degradation mechanisms and mitigation strategies journal June 2019
High electro-catalytic graphite felt/MnO2 composite electrodes for vanadium redox flow batteries journal April 2018
Excellent electrocatalytic effects of tin through in situ electrodeposition on the performance of all-vanadium redox flow batteries journal January 2017
Theory of cyclic voltammetry in random arrays of cylindrical microelectrodes applied to carbon felt electrodes for vanadium redox flow batteries journal January 2019
Binder-free carbon nano-network wrapped carbon felt with optimized heteroatom doping for vanadium redox flow batteries journal January 2019
A polyoxometalate redox flow battery: functionality and upscale journal August 2019
Measurement and Computer Simulation of Catholyte Stability in Vanadium Flow Batteries (VFBs) journal January 2018
Critical Review—Experimental Diagnostics and Material Characterization Techniques Used on Redox Flow Batteries journal January 2018
Exploring the Role of Electrode Microstructure on the Performance of Non-Aqueous Redox Flow Batteries journal January 2019
Chemical Stability of Graphite-Polypropylene Bipolar Plates for the Vanadium Redox Flow Battery at Resting State journal January 2016
Impact of Corrosion Conditions on Carbon Paper Electrode Morphology and the Performance of a Vanadium Redox Flow Battery journal January 2019
Communication—A New Additive for Increased Stabilization of Catholytes in Vanadium Flow Batteries (VFBs) journal January 2019
Degradation Phenomena of Bismuth-Modified Felt Electrodes in VRFB Studied by Electrochemical Impedance Spectroscopy journal January 2019
Influence of Membrane Equivalent Weight and Reinforcement on Ionic Species Crossover in All-Vanadium Redox Flow Batteries journal June 2017