Effective Utilization of Waste Red Mud for High Performance Supercapacitor Electrodes.

ABSTRACT: In recent years, metal oxide-based, inexpensive, stable electrodes are being explored as a potent source of high performance, sustainable supercapacitors. Here, the employment of industrial waste red mud as a pseudocapacitive electrode material is reported. Mechanical milling is used to produce uniform red mud nanoparticles, which are rich in hematite (Fe₂O₃), and lower amounts of other metal oxides. A comprehensive supercapacitive study of the electrode is presented as a function of ball-milling time up to 15 h. Ten-hour ball-milled samples exhibit the highest pseudocapacitive behavior with a specific capacitance value of ≈317 F g^-1, at a scan rate of 10 mV s^-1 in 6 m aqueous potassium hydroxide electrolyte solution. The modified electrode shows

SUBMITTER: Bhattacharya G 

PROVIDER: S-EPMC6607351 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature