Low-crystalline iron oxide hydroxide nanoparticle anode for high-performance supercapacitors.

ABSTRACT: Carbon materials are generally preferred as anodes in supercapacitors; however, their low capacitance limits the attained energy density of supercapacitor devices with aqueous electrolytes. Here, we report a low-crystalline iron oxide hydroxide nanoparticle anode with comprehensive electrochemical performance at a wide potential window. The iron oxide hydroxide nanoparticles present capacitances of 1,066 and 716 F g^-1 at mass loadings of 1.6 and 9.1 mg cm^-2, respectively, a rate capability with 74.6% of capacitance retention at 30 A g^-1, and cycling stability retaining 91% of capacitance after 10,000 cycles. The performance is attributed to a dominant capacitive charge-storage mechanism. An aqueous hybrid supercapacitor based on the iron oxide hydroxide ano

SUBMITTER: Owusu KA 

PROVIDER: S-EPMC5343484 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature