A highly active biomass-derived electrode for all vanadium redox flow batteries
Release Time:2025-04-30
Hits:
- Date:
- 2025-04-30
- Title of Paper:
- A highly active biomass-derived electrode for all vanadium redox flow batteries
- Journal:
- Electrochimica Acta
- Summary:
- In this work, we report an environmentally friendly and low-cost approach to synthesize an all biomass-derived electrode from cotton through a pyrolysis process and apply this novel electrode to a VRFB for the first time. It is demonstrated that this carbonized cotton (CC) electrode presents a higher BET surface area, a larger number of oxygen-containing functional groups, a better wettability and higher catalytic activity for vanadium reactions than commercial carbon papers (CPs) do. As a result, the CC electrode improves the reversibility toward VO2+/VO2+ by 100 mV lower peak separation as compared with commercial CPs. Moreover, the VRFB assembled with the prepared electrodes delivers a high voltage efficiency of 75.4% at a current density of 100 mA cm−2, outperforming the oxidized CPs (68.3%), and a better rate performance during the charge-discharge test at various current densities. These results suggest that the carbonized cotton electrode offers a great promise for the large-scale application in VRFBs
- Co-author:
- Z.H. Zhang, T.S. Zhao, B.F. Bai, L. Zeng, L. Wei
- Volume:
- 2017, 248: 197–205
- Translation or Not:
- No
- Date of Publication:
- 2017-07-24