Details

Autor(en) / Beteiligte

• Deng, Qi
• Zhou, Wei‐Bin
• Wang, Hong‐Rui
• Fu, Na
• Wu, Xiong‐Wei
• Wu, Yu‐Ping

Titel

Aspergillus Niger Derived Wrinkle‐Like Carbon as Superior Electrode for Advanced Vanadium Redox Flow Batteries

Ist Teil von

• Advanced science, 2023-06, Vol.10 (18), p.e2300640-n/a

Ort / Verlag

Germany: John Wiley & Sons, Inc

Erscheinungsjahr

2023

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• The scarcity of high electrocatalysis composite electrode materials has long been suppressing the redox reaction of V(II)/V(III) and V(IV)/V(V) couples in high performance vanadium redox flow batteries (VRFBs). Herein, through ingeniously regulating the growth of Aspergillus Niger, a wrinkle‐like carbon (WLC) material that possesses edge‐rich carbon, abundant heteroatoms, and nature wrinkle‐like structure is obtained, which is subsequently successfully introduced and uniform dispersed on the surface of carbon fiber of graphite felt (GF). This composite electrode presents a lower overpotential and higher charge transfer ability, as the codoped multiheteroatoms increase the electrocatalysis activity and the wrinkled structure affords more abundant reaction area for vanadium ions in the electrolyte when compared with the pristine GF electrode, which is also supported by the density functional theory (DFT) calculations. Hence, the assembled battery using WLC electrodes achieves a high energy efficiency of 74.5% for 300 cycles at a high current density of 200 mA cm−2, as well as the highest current density of 450 mA cm−2. The WLC material not only uncovers huge potential in promoting the application of VRFBs, but also offers referential solution to synthesis microorganism‐based high‐performance electrode in other energy storage systems. By controlling the growth of Aspergillus Niger and the distribution of its products on graphite felt (GF), this work exhibits a microorganism‐based high‐performance electrode, which possesses edge‐rich carbon, abundant heteroatoms, and wrinkle‐like structure and demonstrates excellent electrocatalytic activity for V(II)/V(III) and V(IV)/V(V) redox couples in vanadium redox flow batteries(VRFBs), which is supported by density functional theory (DFT) calculations and experiment analyses.