탄소나노튜브/흑연펠트 전극의 산소작용기를 활용한 바나듐 레독스 흐름 전지의 수소발생 억제 효과
Suppressing Effect of Hydrogen Evolution by Oxygen Functional Groups on CNT/ Graphite Felt Electrode for Vanadium Redox Flow Battery
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Vanadium redox flow batteries (VRFB) have emerged as large-scale energy storage systems (ESS) due to their advantages such as low cross-contamination, long life, and flexible design. However, Hydrogen evolution reaction (HER) in the negative half-cell causes a harmful influence on the performance of the VRFB by consuming current. Moreover, HER hinders V2+/V3+ redox reaction between electrode and electrolyte by forming a bubble. To address the HER problem, carbon nanotube/graphite felt electrode (CNT/GF) with oxygen functional groups was synthesized through the hydrothermal method in the H2SO4 + HNO3 (3:1) mixed acid solution. These oxygen functional groups on the CNT/GF succeed in suppressing the HER and improving charge transfer for V2+/V3+ redox reaction. As a result, the oxygen functional group applied electrode exhibited a low overpotential of 0.395 V for V2+/V3+ redox reaction. Hence, this work could offer a new strategy to design and synthesize effective electrodes for HER suppression and improving the energy density of VRFB.
Abstract
Vanadium redox flow batteries (VRFB) have emerged as large-scale energy storage systems (ESS) due to their advantages such as low cross-contamination, long life, and flexible design. However, Hydrogen evolution reaction (HER) in the negative half-cell causes a harmful influence on the performance of the VRFB by consuming current. Moreover, HER hinders V2+/V3+ redox reaction between electrode and electrolyte by forming a bubble. To address the HER problem, carbon nanotube/graphite felt electrode (CNT/GF) with oxygen functional groups was synthesized through the hydrothermal method in the H2SO4 + HNO3 (3:1) mixed acid solution. These oxygen functional groups on the CNT/GF succeed in suppressing the HER and improving charge transfer for V2+/V3+ redox reaction. As a result, the oxygen functional group applied electrode exhibited a low overpotential of 0.395 V for V2+/V3+ redox reaction. Hence, this work could offer a new strategy to design and synthesize effective electrodes for HER suppression and improving the energy density of VRFB.
참고문헌 (12)
- Skyllas-Kazacos M, "Progress in Flow Battery Research and Development", J. Electrochem. Soc., 158, pp.R55~ (2011)
- Ibrahim H, "Technical and financial benefits of electrical energy storage", 2012 IEEE Electrical Power and Energy Conference, pp.86~91 (2012)
- Li L, "A Stable Vanadium Redox-Flow Battery with High Energy Density for Large-Scale Energy Storage", Adv. Energy Mater, 1, pp.394~400 (2011)
- Zeng L, "Mn3O4 Nanoparticle-Decorated Carbon Cloths with Superior Catalytic Activity for the VII", VIII Redox Reaction in Vanadium Redox Flow Batteries, 2018, pp.6, 1228~1236
- Shen Y, "Electrochemical catalytic activity of tungsten trioxide- modified graphite felt toward VO2+", VO2+ redox reaction, 2014, pp.132, 37~41
- He Z, "N,P co-doped carbon microsphere as superior electrocatalyst for VO2+", VO2+ redox reaction, 2018, pp.259, 122~130
- Sun C-N, "Hydrogen evolution at the negative electrode of the all-vanadium redox flow batteries", J. Power Sources, 248, pp.560~564 (2014)
- Yuan X-Z, "A review of all-vanadium redox flow battery durability: Degradation mechanisms and mitigation strategies", Int. J. Energy Res, 43, pp.6599~6638 (2019)
- Wei L, "In-situ investigation of hydrogen evolution behavior in vanadium redox flow batteries", Appl. Energy, 190, pp.1112~1118 (2017)
- Li W, "Multi-walled carbon nanotubes used as an electrode reaction catalyst for", VO2+ for a vanadium redox flow battery, 2011, pp.49, 3463~3470
- Chandra B, "Molecular-Scale Quantum Dots from Carbon Nanotube Heterojunctions", Nano Lett, 9, pp.1544~1548 (2009)
- Li W, "The electrochemical catalytic activity of single-walled carbon nanotubes towards VO2+", VO2+ and V3+, Electrochim. Acta, pp.2012, 79[DOI]