Toward Low-Cost and Sustainable Supercapacitor Electrode Processing: Simultaneous Carbon Grafting and Coating of Mixed-Valence Metal Oxides by Fast Annealing.

ABSTRACT: There is a rapid market growth for supercapacitors and batteries based on new materials and production strategies that minimize their cost, end-of-life environmental impact, and waste management. Herein, mixed-valence iron oxide (FeO_x) and manganese oxide (Mn₃O₄) and FeO_x-carbon black (FeO_x-CB) electrodes with excellent pseudocapacitive behavior in 1 M Na₂SO₄ are produced by a one-step thermal annealing. Due to the in situ grafted carbon black, the FeO_x-CB shows a high pseudocapacitance of 408 mF cm^-2 (or 128 F g^-1), and Mn₃O₄ after activation shows high pseudocapacitance of 480 mF cm^-2 (192 F g^-1). The asymmetric supercapacitor ba

SUBMITTER: Malaie K 

PROVIDER: S-EPMC6373437 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature