NiMoS-Modified Carbon Felt Electrode for Improved Efficiency and Stability in a Neutral S/Fe Redox Flow Battery
Polysulfide-ferricyanide redox flow batteries (PFRFBs) are gaining significant attention in long-duration energy storage for their abundant availability and environmental benignity. However, the sluggish kinetics of the polysulfide redox reactions have tremendously constrained their performances. To...
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MDPI AG
2025-03-01
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| author | Dan Mei Bowen Liu Haiqing Ma Zhaoguo Zhang Fan Wu Yanan Chen Jawad Ali Futang Xing Liangbin Xiong |
| author_facet | Dan Mei Bowen Liu Haiqing Ma Zhaoguo Zhang Fan Wu Yanan Chen Jawad Ali Futang Xing Liangbin Xiong |
| author_sort | Dan Mei |
| collection | DOAJ |
| description | Polysulfide-ferricyanide redox flow batteries (PFRFBs) are gaining significant attention in long-duration energy storage for their abundant availability and environmental benignity. However, the sluggish kinetics of the polysulfide redox reactions have tremendously constrained their performances. To address this issue, we developed a NiMoS catalyst-modified carbon felt (NiMoS-CF) electrode, which significantly accelerates the electrochemical reaction rates and enhances the cycling stability of PFRFB. Our PFRFB system, integrated with the NiMoS-CF electrode, exhibited an energy efficiency of 70% and a voltage efficiency of 87%, with a remarkable doubling of its cycle life as opposed to the pristine carbon felt (CF) electrode at a current density of 40 mA cm<sup>−2</sup>. Notably, during 2500 cycles of charge–discharge testing, we achieved an average coulombic efficiency exceeding 99%. These improvements in PFRFB performance can be attributed to the NiMoS-CF electrode’s large surface area, low resistance, and robust redox activity. This study offerings a novel approach for enhancing the electrochemical reaction kinetics and cycling stability in PFRFBs, laying a scientific foundation in the applications of practical PFRFBs for next-generation energy storage. |
| format | Article |
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| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj-art-a66dabb38b9f47b5ae3d98f38a2d55002025-08-20T03:43:25ZengMDPI AGMolecules1420-30492025-03-01306121910.3390/molecules30061219NiMoS-Modified Carbon Felt Electrode for Improved Efficiency and Stability in a Neutral S/Fe Redox Flow BatteryDan Mei0Bowen Liu1Haiqing Ma2Zhaoguo Zhang3Fan Wu4Yanan Chen5Jawad Ali6Futang Xing7Liangbin Xiong8College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Environment and Biological Engineering, Wuhan Technology and Business University, Wuhan 430065, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Environment and Biological Engineering, Wuhan Technology and Business University, Wuhan 430065, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Optoelectronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, ChinaPolysulfide-ferricyanide redox flow batteries (PFRFBs) are gaining significant attention in long-duration energy storage for their abundant availability and environmental benignity. However, the sluggish kinetics of the polysulfide redox reactions have tremendously constrained their performances. To address this issue, we developed a NiMoS catalyst-modified carbon felt (NiMoS-CF) electrode, which significantly accelerates the electrochemical reaction rates and enhances the cycling stability of PFRFB. Our PFRFB system, integrated with the NiMoS-CF electrode, exhibited an energy efficiency of 70% and a voltage efficiency of 87%, with a remarkable doubling of its cycle life as opposed to the pristine carbon felt (CF) electrode at a current density of 40 mA cm<sup>−2</sup>. Notably, during 2500 cycles of charge–discharge testing, we achieved an average coulombic efficiency exceeding 99%. These improvements in PFRFB performance can be attributed to the NiMoS-CF electrode’s large surface area, low resistance, and robust redox activity. This study offerings a novel approach for enhancing the electrochemical reaction kinetics and cycling stability in PFRFBs, laying a scientific foundation in the applications of practical PFRFBs for next-generation energy storage.https://www.mdpi.com/1420-3049/30/6/1219polysulfide-ferricyanide redox flow batteryNiMoS catalystcarbon felt electrodeelectrochemical kineticscycling stability |
| spellingShingle | Dan Mei Bowen Liu Haiqing Ma Zhaoguo Zhang Fan Wu Yanan Chen Jawad Ali Futang Xing Liangbin Xiong NiMoS-Modified Carbon Felt Electrode for Improved Efficiency and Stability in a Neutral S/Fe Redox Flow Battery Molecules polysulfide-ferricyanide redox flow battery NiMoS catalyst carbon felt electrode electrochemical kinetics cycling stability |
| title | NiMoS-Modified Carbon Felt Electrode for Improved Efficiency and Stability in a Neutral S/Fe Redox Flow Battery |
| title_full | NiMoS-Modified Carbon Felt Electrode for Improved Efficiency and Stability in a Neutral S/Fe Redox Flow Battery |
| title_fullStr | NiMoS-Modified Carbon Felt Electrode for Improved Efficiency and Stability in a Neutral S/Fe Redox Flow Battery |
| title_full_unstemmed | NiMoS-Modified Carbon Felt Electrode for Improved Efficiency and Stability in a Neutral S/Fe Redox Flow Battery |
| title_short | NiMoS-Modified Carbon Felt Electrode for Improved Efficiency and Stability in a Neutral S/Fe Redox Flow Battery |
| title_sort | nimos modified carbon felt electrode for improved efficiency and stability in a neutral s fe redox flow battery |
| topic | polysulfide-ferricyanide redox flow battery NiMoS catalyst carbon felt electrode electrochemical kinetics cycling stability |
| url | https://www.mdpi.com/1420-3049/30/6/1219 |
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