Anchoring carbon layers and oxygen vacancies endow WO_3-x /C electrode with high specific capacity and rate performance for supercapacitors.

ABSTRACT: Herein, novel hierarchical carbon layer-anchored WO_3-x /C ultra-long nanowires were developed via a facile solvent-thermal treatment and a subsequent rapid carbonization process. The inner anchored carbon layers and abundant oxygen vacancies endowed the WO_3-x /C nanowire electrode with high conductivity, as measured with a single nanowire, which greatly enhanced the redox reaction active sites and rate performance. Surprisingly, the WO_3-x /C electrode exhibited outstanding specific capacitance of 1032.16 F g^-1 at the current density of 1 A g^-1 in a 2 M H₂SO₄ electrolyte and maintained the specific capacitance of 660 F g^-1 when the current density increased to 50 A g^-1

SUBMITTER: Xu J 

PROVIDER: S-EPMC9071235 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature