CoS _x /C hierarchical hollow nanocages from a metal-organic framework as a positive electrode with enhancing performance for aqueous supercapacitors.

ABSTRACT: Benefiting from abundant redox chemistry and high electrochemical properties, metal sulfides have been broadly employed as electrode materials in supercapacitor systems. However, the predominant limitation in their performance, which arises from indifferent electron and ion dynamics for transportation and a rapid slash in capacitance, is of particular concern. Herein, we portray the cobalt sulfides/carbon (CoS _x /C) hierarchical hollow nanocages using ZIF-67 nanocrystals coated with carbon from resorcinol-formaldehyde (ZIF-67@RF) as a self-sacrificial template. The RF acted as a hard framework to prevent the hollow structure from breaking and was transformed to a carbon layer to enhance the charge transfer process. When used as positive electrodes in supercapacitor system

SUBMITTER: Zhou W 

PROVIDER: S-EPMC9063036 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature