Preparation of Codoped Multi-level Structured Carbon Felt Electrode and Its Performance in All-vanadium Flow Battery
LIU Xiaoqi, BAO Yuheng, YANG Qi, ZHANG Jing, LIU Yiming*
Shanxi Key Laboratory of Catalysis and Energy Coupling, College of Chemical Engineering and Technology, Taiyuan University of Science and Technology, Taiyuan 030024, China
Abstract: n this work, a high-performance carbon felt electrode with a large specific surface area and excellent electrochemical activity was prepared via acombined strategy of CO2 etching and nitrogen/sulfur (N, S) co-doping, aiming to improve the performance of all-vanadium flow batte-ries (VFBs). Morphological and compositional analyses demonstrated that the synergistic modification introduced abundant porous structures and oxygen-containing functional groups on the carbon felt surface, thereby significantly enhancing its surface area and electrochemical reactivity. Electrochemical tests revealed that the modified electrode exhibited remarkable catalytic activity toward both the VO2+/VO2+ and V3+/V2+ redox couples. The assembled VFB achieved an energy efficiency exceeding 80% at a current density of 150 mA·cm-2 and maintained stable cycling performance over 500 consecutive charge-discharge cycles. Moreover, the battery delivered a peak power density of 856.3 mW·cm-2, indicating excellent rate capability. This study provides a facile and effective approach for the design and fabrication of high-performance electrode materials for VFBs, offering promising prospects for practical large-scale energy storage applications.
刘晓奇, 鲍昱衡, 杨淇, 张静, 刘一鸣. 共掺杂多级结构碳毡电极的制备及其在全钒液流电池中的性能研究[J]. 材料导报, 2026, 40(10): 25050120-6.
LIU Xiaoqi, BAO Yuheng, YANG Qi, ZHANG Jing, LIU Yiming. Preparation of Codoped Multi-level Structured Carbon Felt Electrode and Its Performance in All-vanadium Flow Battery. Materials Reports, 2026, 40(10): 25050120-6.
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2026, Vol. 40 
