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Title: A symmetric organic-based nonaqueous redox flow battery and its state of charge diagnostics by FTIR

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/c6ta01177b· OSTI ID:1254564
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  1. Joint Center for Energy Storage Research (JCESR) (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Joint Center for Energy Storage Research (JCESR) (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Chemical Engineering
  3. Joint Center for Energy Storage Research (JCESR) (United States); Univ. of Michigan, Ann Arbor, MI (United States)
  4. Joint Center for Energy Storage Research (JCESR) (United States); Univ. of Illinois Urbana-Champaign, Urbana, IL (United States)
  5. Joint Center for Energy Storage Research (JCESR) (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
  6. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  7. Joint Center for Energy Storage Research (JCESR) (United States); United Technologies Research Center, East Hartford, CT (United States)
  8. Joint Center for Energy Storage Research (JCESR) (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Redox flow batteries have shown outstanding promise for grid-scale energy storage to promote utilization of renewable energy and improve grid stability. Nonaqueous battery systems can potentially achieve high energy density because of their broad voltage window. In this paper, we report a new organic redox-active material for use in a nonaqueous redox flow battery, 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (PTIO) that has high solubility (>2.6 M) in organic solvents. PTIO exhibits electrochemically reversible disproportionation reactions and thus can serve as both anolyte and catholyte redox materials in a symmetric flow cell. The PTIO flow battery has a moderate cell voltage of ~1.7 V and shows good cyclability under both cyclic voltammetry and flow cell conditions. Moreover, we demonstrate that FTIR can offer accurate estimation of the PTIO concentration in electrolytes and determine the state of charge of the PTIO flow cell, which suggests FTIR potentially as a powerful online battery status sensor. In conclusion, this study is expected to inspire more insights in this under-addressed area of state of charge analysis aiming at operational safety and reliability of flow batteries.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1254564
Report Number(s):
PNNL-SA-115896; JMCAET; 48374; KC0208010
Journal Information:
Journal of Materials Chemistry. A, Vol. 4, Issue 15; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 147 works
Citation information provided by
Web of Science

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Cited By (21)

Liquid Quinones for Solvent-Free Redox Flow Batteries journal September 2017
Na 3 V 2 (PO 4 ) 3 as the Sole Solid Energy Storage Material for Redox Flow Sodium‐Ion Battery journal June 2019
Redox-Flow-Batterien: von metallbasierten zu organischen Aktivmaterialien journal November 2016
Redox-Flow Batteries: From Metals to Organic Redox-Active Materials journal November 2016
Macromolecular Design Strategies for Preventing Active-Material Crossover in Non-Aqueous All-Organic Redox-Flow Batteries journal January 2017
Toward High‐Voltage, Energy‐Dense, and Durable Aqueous Organic Redox Flow Batteries: Role of the Supporting Electrolytes journal September 2018
Aqueous Flow Batteries: Research and Development journal November 2018
FTIR study of the surface properties and tribological behaviors of plasma-modified UHMWPE and zirconia journal November 2018
A bipolar nitronyl nitroxide small molecule for an all-organic symmetric redox-flow battery journal January 2017
All-polymer particulate slurry batteries journal June 2019
Bioinspired, high-stability, nonaqueous redox flow battery electrolytes journal January 2017
Metal-based heterogeneous electrocatalysts for reduction of carbon dioxide and nitrogen: mechanisms, recent advances and perspective journal January 2018
Improved synthesis of N -ethyl-3,7-bis(trifluoromethyl)phenothiazine journal January 2020
Progress in the Design of Polyoxovanadate-Alkoxides as Charge Carriers for Nonaqueous Redox Flow Batteries journal March 2019
Redox targeting-based flow batteries journal August 2019
Understanding and Mitigating Capacity Fade in Aqueous Organic Redox Flow Batteries journal January 2018
Operando Spectroelectrochemical Characterization of a Highly Stable Bioinspired Redox Flow Battery Active Material journal January 2019
Critical Review—Experimental Diagnostics and Material Characterization Techniques Used on Redox Flow Batteries journal January 2018
A High Voltage Organic Redox Flow Battery with Redox Couples O 2 /Tetrabutylammonium Complex and Tris(4-bromophenyl)amine as Redox Active Species journal January 2018
Understanding and Mitigating Capacity Fade in Aqueous Organic Redox Flow Batteries journal April 2018
Macromolecular Design Strategies for Preventing Active-Material Crossover in Non-Aqueous All-Organic Redox-Flow Batteries journal January 2017

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