Method of fabricating electrodes of high power-density flow cell

摘要

A method is provided for producing electrodes of flow cell having high power density. A plurality of seeds are distributed on a surface of a conductive carbon material. The seeds are etched into nanoparticles to form carbon nanotube (CNT) electrodes. The present invention can be applied to vanadium redox flow cell with advantages of the CNT electrodes, such as conductivity, corrosion resistance, mechanical strength and specific and electrochemical surface area. Electrons are directly passed to the material through CNTs and then to an external electronic load for improving power density of flow cell, making a cell pack more compact and reducing energy consumption on charging and discharging without using noble metal material.

主权项

1. A method of fabricating electrodes of high power-density flow cell, comprising steps of:
(a) pre-treatment: processing a first high-temperature treatment at a first elevated temperature to a conductive carbon material, then cooling the conductive carbon material to room temperature, then exposing the conductive carbon material to a second high-temperature treatment at a second, more elevated temperature; (b) seed settlement: distributing a plurality of seeds on a surface of said conductive carbon material; (c) etching: etching each of said seeds on said surface of said conductive carbon material into a plurality of nanoparticles; and (d) microwave molding: forming a plurality of carbon nanotube (CNT) electrodes on said surface of said conductive carbon material by introducing CH4, H2 and N2 and directly microwaving said nanoparticles, wherein, in step (a), said first high-temperature treatment comprises exposing the carbon-based conductive material to a temperature of 140 Celsius degrees (° C.)±20% for at least 10 hours in a furnace with oxygen introduced.