Graphite Felt Electrode Modified by Quaternary Ammonium for Vanadium Redox Flow Battery with an Ultra-Long Cycle Life
Xuejiao Liu,
Junping Hu,
Jun Liu,
Hongyi Liu,
Sha Fu,
Xiongwei Wu,
Yuping Wu
Affiliations
Xuejiao Liu
School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Junping Hu
School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Jun Liu
School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hongyi Liu
School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Sha Fu
School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Xiongwei Wu
School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Yuping Wu
State Key Laboratory of Materials-Oriented Chemical Engineering, School of Energy Science and Engineering, Nanjing Tech University Nanjing, Nanjing 211816, China
Vanadium redox flow batteries (VRFBs) are one of the most attractive devices for grid-scale energy storage due to their advantages of high safety, flexible assembly, and electrolyte-class recycling. However, the conventional graphite felt electrodes usually possess inferior electrocatalytic activity for vanadium ion redox reactions, vastly limiting the rate and lifespans of VRFBs. Herein, we demonstrate a high-rate and ultra-stable vanadium redox flow battery based on quaternary ammonium salt-modified graphite felt electrodes. At a high current density of 200 mA cm−2, the constructed VRFB exhibited a superior cycling life of up to 1000 cycles. This work affords a straightforward approach for developing efficient, environmentally friendly, and low-cost graphite felt electrodes for ultra-stable and high-rate VRFBs.
