Electrochemically etched porous graphite felt electrode material and flow battery prepared from same

• Main Authors: YAO SHENGXIN, JI CHAO, NIE CHANGTONG, HAN HONGJING, XU JUNHUI, WANG HUI, CHEN LIUPING
• Format: Patent
• Language: Chinese; English
• Published: 25.04.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to an electrochemically-etched porous graphite felt electrode material and a flow battery prepared from the electrochemically-etched porous graphite felt electrode material, the hydrophilicity of a graphite felt is changed by performing electrochemical pretreatment on the graphite felt, the treated graphite felt is cleaned and dried, and the dried graphite felt is put into an electrolyte solution to be electrochemically etched, so that the porous graphite felt electrode material is obtained. The method comprises the following steps: introducing irregular pit hole structures on the carbon fiber surface and inside of a graphite felt electrode material, then taking out an etched graphite felt electrode, carrying out ultrasonic cleaning with deionized water, and drying to obtain the electrochemical etched porous graphite felt electrode material. According to the invention, an electrochemical treatment method is adopted to etch a graphite felt electrode material, the graphite felt is used as