Graphite felt electrode material modification method based on three-dimensional porous MnO2 and application thereof

• Main Authors: LI YUE, NIE CHANGTONG, JI CHAO, WU YI, HAN HONGJING, XU JUNHUI, CHEN LIUPING
• Format: Patent
• Language: Chinese; English
• Published: 12.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; NANOTECHNOLOGY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

The invention relates to a graphite felt electrode material modification method based on three-dimensional porous MnO2, which comprises the following steps: pretreating a graphite felt by adopting a single-mode microwave electric field to increase the wettability and surface defects of the graphite felt; according to the method, a potassium permanganate solution in an acidic environment is adopted to carry out oxidation-reduction reaction on a pretreated graphite felt, so that MnO2 with a three-dimensional porous nanostructure uniformly grows on the surface of a graphite felt electrode, and the catalytic activity of MnO2 and the relatively high specific surface area of the three-dimensional nanostructure are utilized to increase reaction active sites on the surface of carbon fibers of the graphite felt, so that the battery efficiency is improved. The graphite felt electrode material obtained on the basis of modification of the three-dimensional porous MnO2 has rich three-dimensional structures, large specific