Exploring Ion Pairing Behavior on the Performance of Bipyridinium-Based Aqueous Organic Flow Batteries
- 1Electric Power Research Institute of Guizhou Power Grid Co., Ltd., Guiyang 550002, China
- 2Xingyi Power Supply Bureau of Guizhou Power Grid Co., Ltd., Xingyi 562400, China
- 3National Advanced Energy Storage Innovation Center, Guangzhou 510080, China
Abstract
Aqueous organic flow batteries (AOFBs) are a promising technology for large-scale energy storage. The electrolyte solution is significant in determining the battery’s performance, which has so far remained poorly understood, especially for concentrated electrolyte. In this work, by combining nuclear magnetic resonance (NMR) and molecular dynamic simulations, we explored ion pairing behavior in bipyridinium-based concentrated electrolytes for AOFBs. Through 1H NMR and 35Cl NMR investigation, the anisotropy of ion pairing behavior between the bipyridinium dications and the chloride counterions was demonstrated. The relationship between bipyridinium-based electrolyte structures and their solubility is illustrated. The volume-specific capacity of bipyridinium-based flow batteries varies and differs nearly threefold for 2.50 M electrolytes with different configurations. This work provides new insights for designing electroactive materials and optimizing the performance of AOFBs.
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BibTeX
@article{chen2026exploring,
title = {{Exploring Ion Pairing Behavior on the Performance of Bipyridinium-Based Aqueous Organic Flow Batteries}},
author = {Junwei Chen and Quan Hu and Mingwei Wang and Ying Zhang and Chaojie Li and Zengxin Pu and Tianjing Shao and Ruijing Yang and Weiping Li and Chao Wang and Wenjin Li},
journal = {Batteries},
year = {2026},
month = oct,
doi = {10.3390/batteries12100439},
url = {https://www.mdpi.com/2313-0105/12/10/439},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Exploring Ion Pairing Behavior on the Performance of Bipyridinium-Based Aqueous Organic Flow Batteries
AU - Junwei Chen
AU - Quan Hu
AU - Mingwei Wang
AU - Ying Zhang
AU - Chaojie Li
AU - Zengxin Pu
AU - Tianjing Shao
AU - Ruijing Yang
AU - Weiping Li
AU - Chao Wang
AU - Wenjin Li
PY - 2026
DA - 2026/10/21
JO - Batteries
DO - 10.3390/batteries12100439
UR - https://www.mdpi.com/2313-0105/12/10/439
AB - Aqueous organic flow batteries (AOFBs) are a promising technology for large-scale energy storage. The electrolyte solution is significant in determining the battery’s performance, which has so far remained poorly understood, especially for concentrated electrolyte. In this work, by combining nuclear magnetic resonance (NMR) and molecular dynamic simulations, we explored ion pairing behavior in bipyridinium-based concentrated electrolytes for AOFBs. Through 1H NMR and 35Cl NMR investigation, the anisotropy of ion pairing behavior between the bipyridinium dications and the chloride counterions was demonstrated. The relationship between bipyridinium-based electrolyte structures and their solubility is illustrated. The volume-specific capacity of bipyridinium-based flow batteries varies and differs nearly threefold for 2.50 M electrolytes with different configurations. This work provides new insights for designing electroactive materials and optimizing the performance of AOFBs.
SN - 2313-0105
ER -