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Leveraging Temperature-Dependent (Electro)Chemical Kinetics for High-Throughput Flow Battery Characterization

Journal Article · · Journal of the Electrochemical Society
 [1];  [2];  [3];  [3];  [2]
  1. Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA (United States); Harvard University
  2. Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA (United States)
  3. Harvard University, Cambridge, MA (United States)
The library of redox-active organics that are potential candidates for electrochemical energy storage in flow batteries is exceedingly vast, necessitating high-throughput characterization of molecular lifetimes. Demonstrated extremely stable chemistries require accurate yet rapid cell cycling tests, a demand often frustrated by time-denominated capacity fade mechanisms. We have developed a high-throughput setup for elevated temperature cycling of redox flow batteries, providing a new dimension in characterization parameter space to explore. We utilize it to evaluate capacity fade rates of aqueous redox-active organic molecules, as functions of temperature. We demonstrate Arrhenius-like behavior in the temporal capacity fade rates of multiple flow battery electrolytes, permitting extrapolation to lower operating temperatures. Collectively, these results highlight the importance of accelerated decomposition protocols to expedite the screening process of candidate molecules for long lifetime flow batteries.
Research Organization:
Harvard University, Cambridge, MA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830; EE0009795
OSTI ID:
2339883
Journal Information:
Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 171; ISSN 0013-4651
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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