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Title: All-soluble all-iron aqueous redox-flow battery

The rapid growth of intermittent renewable energy (e.g., wind and solar) demands low-cost and large-scale energy storage systems for smooth and reliable power output, where redox-flow batteries (RFBs) could find their niche. In this work, we introduce the first all-soluble all-iron RFB based on iron as the same redox-active element but with different coordination chemistries in alkaline aqueous system. The adoption of the same redox-active element largely alleviates the challenging problem of cross-contamination of metal ions in RFBs that use two redox-active elements. An all-soluble all-iron RFB is constructed by combining an iron–triethanolamine redox pair (i.e., [Fe(TEOA)OH] /[Fe(TEOA)(OH)] 2–) and an iron–cyanide redox pair (i.e., Fe(CN) 6 3–/Fe(CN) 6 4–), creating 1.34 V of formal cell voltage. Furthermore, good performance and stability have been demonstrated, after addressing some challenges, including the crossover of the ligand agent. As exemplified by the all-soluble all-iron flow battery, combining redox pairs of the same redox-active element with different coordination chemistries could extend the spectrum of RFBs.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1]
  1. Univ. of Delaware, Newark, DE (United States)
  2. Wichita State Univ., Wichita, KS (United States)
Publication Date:
Grant/Contract Number:
AR0000346
Type:
Published Article
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 1; Journal Issue: 1; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Research Org:
Wichita State Univ., Wichita, KS (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE
OSTI Identifier:
1252078
Alternate Identifier(s):
OSTI ID: 1267248

Gong, Ke, Xu, Fei, Grunewald, Jonathan B., Ma, Xiaoya, Zhao, Yun, Gu, Shuang, and Yan, Yushan. All-soluble all-iron aqueous redox-flow battery. United States: N. p., Web. doi:10.1021/acsenergylett.6b00049.
Gong, Ke, Xu, Fei, Grunewald, Jonathan B., Ma, Xiaoya, Zhao, Yun, Gu, Shuang, & Yan, Yushan. All-soluble all-iron aqueous redox-flow battery. United States. doi:10.1021/acsenergylett.6b00049.
Gong, Ke, Xu, Fei, Grunewald, Jonathan B., Ma, Xiaoya, Zhao, Yun, Gu, Shuang, and Yan, Yushan. 2016. "All-soluble all-iron aqueous redox-flow battery". United States. doi:10.1021/acsenergylett.6b00049.
@article{osti_1252078,
title = {All-soluble all-iron aqueous redox-flow battery},
author = {Gong, Ke and Xu, Fei and Grunewald, Jonathan B. and Ma, Xiaoya and Zhao, Yun and Gu, Shuang and Yan, Yushan},
abstractNote = {The rapid growth of intermittent renewable energy (e.g., wind and solar) demands low-cost and large-scale energy storage systems for smooth and reliable power output, where redox-flow batteries (RFBs) could find their niche. In this work, we introduce the first all-soluble all-iron RFB based on iron as the same redox-active element but with different coordination chemistries in alkaline aqueous system. The adoption of the same redox-active element largely alleviates the challenging problem of cross-contamination of metal ions in RFBs that use two redox-active elements. An all-soluble all-iron RFB is constructed by combining an iron–triethanolamine redox pair (i.e., [Fe(TEOA)OH]–/[Fe(TEOA)(OH)]2–) and an iron–cyanide redox pair (i.e., Fe(CN)6 3–/Fe(CN)6 4–), creating 1.34 V of formal cell voltage. Furthermore, good performance and stability have been demonstrated, after addressing some challenges, including the crossover of the ligand agent. As exemplified by the all-soluble all-iron flow battery, combining redox pairs of the same redox-active element with different coordination chemistries could extend the spectrum of RFBs.},
doi = {10.1021/acsenergylett.6b00049},
journal = {ACS Energy Letters},
number = 1,
volume = 1,
place = {United States},
year = {2016},
month = {5}
}