Facile Electrochemical Fabrication of Porous Fe2O3 Nanosheets for Flexible Asymmetric Supercapacitors

作者：Li, Ting; Yu, Hang; Zhi, Lei; Zhang, Wenliang; Dang, Liqin; Liu, Zonghuai; Lei, Zhibin^*

来源：Journal of Physical Chemistry C, 2017, 121(35): 18982-18991.

DOI：10.1021/acs.jpcc.7b04330

• EXCELLENT RATE CAPABILITY
• HIGH-ENERGY-DENSITY
• HIGH-PERFORMANCE
• CARBON CLOTH
• NEGATIVE ELECTRODES
• ANODE MATERIALS
• GRAPHENE OXIDE
• FEOOH NANORODS
• ARRAYS
• CAPACITANCE

Fe2O3 is one of the promising negative electrodes for asymmetric supercapacitors. But the rather low conductivity and poor cycling stability hinder its practical application. Herein, we report a facile electrochemical deposition technique to prepare porous Fe2O3 nanosheets on carbon fabric (CF-Fe2O3). The obtained Fe2O3 displays highly porous nanosheet structure with reduced ion diffusion length and significantly enhanced conductivity. As a flexible supercapacitor electrode, the CF-Fe2O3 hybrid electrode delivers a large areal capacitance of 1.56 F cm(-2), good rate capability, and excellent cycling stability without capacitance decay after 5000 cycles. A packaged solid-state supercapacitor device based on the flexible CF-Fe2O3 electrode exhibits an areal capacitance of 842 mF cm(-2) and a volumetric energy density of 6.75 mWh cm(-3), together with superior cycling performance which remains 93% capacitance after 4000 cycles. Moreover, the device performance is well retained under various bending and twisting states.

• 出版日期2017-9-7
• 单位陕西师范大学