skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: “Wine-Dark Sea” in an Organic Flow Battery: Storing Negative Charge in 2,1,3-Benzothiadiazole Radicals Leads to Improved Cyclability

Abstract

Redox-active organic materials (ROMs) have shown great promise for redox flow battery applications but generally encounter limited cycling efficiency and stability at relevant redox material concentrations in nonaqueous systems. Here we report a new heterocyclic organic anolyte molecule, 2,1,3-benzothiadiazole, that has high solubility, a low redox potential, and fast electrochemical kinetics. Coupling it with a benchmark catholyte ROM, the nonaqueous organic flow battery demonstrated significant improvement in cyclable redox material concentrations and cell efficiencies compared to the state-of-the-art nonaqueous systems. Especially, this system produced exceeding cyclability with relatively stable efficiencies and capacities at high ROM concentrations (>0.5 M), which is ascribed to the highly delocalized charge densities in the radical anions of 2,1,3-benzothiadiazole, leading to good chemical stability. As a result, this material development represents significant progress toward promising next-generation energy storage.

Authors:
 [1];  [2];  [3]; ORCiD logo [2];  [1];  [4];  [2];  [1];  [3];  [4];  [2];  [2]; ORCiD logo [4]; ORCiD logo [1];  [5]; ORCiD logo [3];  [2]; ORCiD logo [1]
  1. Joint Center for Energy Storage Research, Argonne, IL (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Joint Center for Energy Storage Research, Argonne, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Joint Center for Energy Storage Research, Argonne, IL (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  5. Joint Center for Energy Storage Research, Argonne, IL (United States); Univ. of Illinois Urbana-Champaign, Urbana, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1360150
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Energy Letters; Journal Volume: 2; Journal Issue: 5
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; flow battery, anolyte, non-aqueous, high concentration, cycling

Citation Formats

Duan, Wentao, Huang, Jinhua, Kowalski, Jeffrey A., Shkrob, Ilya A., Vijayakumar, M., Walter, Eric, Pan, Baofei, Yang, Zheng, Milshtein, Jarrod D., Li, Bin, Liao, Chen, Zhang, Zhengcheng, Wang, Wei, Liu, Jun, Moore, Jeffery S., Brushett, Fikile R., Zhang, Lu, and Wei, Xiaoliang. “Wine-Dark Sea” in an Organic Flow Battery: Storing Negative Charge in 2,1,3-Benzothiadiazole Radicals Leads to Improved Cyclability. United States: N. p., 2017. Web. doi:10.1021/acsenergylett.7b00261.
Duan, Wentao, Huang, Jinhua, Kowalski, Jeffrey A., Shkrob, Ilya A., Vijayakumar, M., Walter, Eric, Pan, Baofei, Yang, Zheng, Milshtein, Jarrod D., Li, Bin, Liao, Chen, Zhang, Zhengcheng, Wang, Wei, Liu, Jun, Moore, Jeffery S., Brushett, Fikile R., Zhang, Lu, & Wei, Xiaoliang. “Wine-Dark Sea” in an Organic Flow Battery: Storing Negative Charge in 2,1,3-Benzothiadiazole Radicals Leads to Improved Cyclability. United States. doi:10.1021/acsenergylett.7b00261.
Duan, Wentao, Huang, Jinhua, Kowalski, Jeffrey A., Shkrob, Ilya A., Vijayakumar, M., Walter, Eric, Pan, Baofei, Yang, Zheng, Milshtein, Jarrod D., Li, Bin, Liao, Chen, Zhang, Zhengcheng, Wang, Wei, Liu, Jun, Moore, Jeffery S., Brushett, Fikile R., Zhang, Lu, and Wei, Xiaoliang. Mon . "“Wine-Dark Sea” in an Organic Flow Battery: Storing Negative Charge in 2,1,3-Benzothiadiazole Radicals Leads to Improved Cyclability". United States. doi:10.1021/acsenergylett.7b00261.
@article{osti_1360150,
title = {“Wine-Dark Sea” in an Organic Flow Battery: Storing Negative Charge in 2,1,3-Benzothiadiazole Radicals Leads to Improved Cyclability},
author = {Duan, Wentao and Huang, Jinhua and Kowalski, Jeffrey A. and Shkrob, Ilya A. and Vijayakumar, M. and Walter, Eric and Pan, Baofei and Yang, Zheng and Milshtein, Jarrod D. and Li, Bin and Liao, Chen and Zhang, Zhengcheng and Wang, Wei and Liu, Jun and Moore, Jeffery S. and Brushett, Fikile R. and Zhang, Lu and Wei, Xiaoliang},
abstractNote = {Redox-active organic materials (ROMs) have shown great promise for redox flow battery applications but generally encounter limited cycling efficiency and stability at relevant redox material concentrations in nonaqueous systems. Here we report a new heterocyclic organic anolyte molecule, 2,1,3-benzothiadiazole, that has high solubility, a low redox potential, and fast electrochemical kinetics. Coupling it with a benchmark catholyte ROM, the nonaqueous organic flow battery demonstrated significant improvement in cyclable redox material concentrations and cell efficiencies compared to the state-of-the-art nonaqueous systems. Especially, this system produced exceeding cyclability with relatively stable efficiencies and capacities at high ROM concentrations (>0.5 M), which is ascribed to the highly delocalized charge densities in the radical anions of 2,1,3-benzothiadiazole, leading to good chemical stability. As a result, this material development represents significant progress toward promising next-generation energy storage.},
doi = {10.1021/acsenergylett.7b00261},
journal = {ACS Energy Letters},
number = 5,
volume = 2,
place = {United States},
year = {Mon Apr 24 00:00:00 EDT 2017},
month = {Mon Apr 24 00:00:00 EDT 2017}
}