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Porous Fe2O3 Nanorods on Hierarchical Porous Biomass Carbon as Advanced Anode for High-Energy-Density Asymmetric Supercapacitors.

ABSTRACT: In this study, a novel negative electrode material was prepared by aligning ?-Fe2O3 nanorods on a hierarchical porous carbon (HPC) skeleton. The skeleton was derived from wheat flour by a facile hydrothermal route to enhance conductivity, improve surface properties, and achieve substantially good electrochemical performances. The ?-Fe2O3/HPC electrode exhibits enhanced specific capacitance of 706 F g-1, which is twice higher than that of ?-Fe2O3. The advanced ?-Fe2O3/HPC//PANI/HPC asymmetrical supercapacitor was built with an expanded voltage of 2.0 V in 1 M Li2SO4, possessing a specific capacitance of 212 F g-1 at 1 A g-1 and a maximum energy density of 117 Wh kg-1 at 1.0 kW kg-1, along with an excellent stability of 5.8% decay in capacitance after 5,000 cycles. This study affords a simple process to develop asymmetric supercapacitors, which exhibit high electrochemical performances and are applicable in next-generation energy storage devices, based on ?-Fe2O3 hybrid materials.

SUBMITTER: Yu P 

PROVIDER: S-EPMC7726331 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Porous Fe<sub>2</sub>O<sub>3</sub> Nanorods on Hierarchical Porous Biomass Carbon as Advanced Anode for High-Energy-Density Asymmetric Supercapacitors.

Yu Pingping P   Duan Wei W   Jiang Yanfeng Y  

Frontiers in chemistry 20201126

In this study, a novel negative electrode material was prepared by aligning α-Fe<sub>2</sub>O<sub>3</sub> nanorods on a hierarchical porous carbon (HPC) skeleton. The skeleton was derived from wheat flour by a facile hydrothermal route to enhance conductivity, improve surface properties, and achieve substantially good electrochemical performances. The α-Fe<sub>2</sub>O<sub>3</sub>/HPC electrode exhibits enhanced specific capacitance of 706 F g<sup>-1</sup>, which is twice higher than that of α-F  ...[more]

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