期刊
ACS APPLIED ENERGY MATERIALS
卷 6, 期 6, 页码 3301-3311出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c03891
关键词
BiVO4; electrocatalyst; graphite felt; negative electrode; vanadium redox flow battery
This paper presents the successful fabrication of a low-cost platelike bismuth vanadate (BiVO4) material through a simple hydrothermal route, which is used as an electrocatalyst for the negative electrode in vanadium redox flow batteries (VRFBs). The BiVO4-decorated graphite felt (GF) electrode exhibits optimal electrocatalytic activity and reversibility for the redox reactions. The VRFB cell assembled with BiVO4-GF as the negative electrode demonstrates higher energy efficiency and stability compared to the cell with a heat-treated graphite felt (HT-GF) electrode.
Recently, discovering high-performance electrocatalytic materials for vanadium redox flow batteries (VRFBs) has been one of the most crucial tasks. This paper details the successful fabrication of a low-cost platelike bismuth vanadate (BiVO4) material through a simple one-step hydrothermal route, employed as an electrocatalyst to adorn graphite felt (GF) for use as the negative electrode in VRFBs. The experimental results show that BiVO4-3h exhibits the optimal electrocatalytic activity and reversibility for the vanadium redox couples among all samples. The energy efficiency of the VRFB cell assembled with BiVO4-decorated GF as the negative electrode is found to be 75.42% at 100 mA cm(-2), which is about 10.24% more efficient than that of the cell assembled with a heat-treated graphite felt (HT-GF) electrode. The possible reasons for the activity enhancement can be ascribed to the existence of oxygen vacancies in the BiVO4 lattice structure and the relatively high surface area of BiVO4, which provide more active sites for facilitating the vanadium redox reactions. Furthermore, the BiVO4-GF electrode obstructs the competitive irreversible hydrogen evolution reaction on the negative side of the cell, and it also has better wettability. Impressively, BiVO4-GF as the negative electrode shows good stability over 100 cycles.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据