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Towards High Areal Capacitance, Rate Capability and Tailorable Supercapacitor: Co3O4@Polypyrrole Core-Shell Nanorod Bundle Arrays Electrode

Abstract

Flexible supercapacitor with high areal capacitance is a promising approach to wearable energy-storage technologies due to the limitation of the surface area of human body (about 2 m2). Meanwhile, tolerance to deformation and mechanic damage is critical to wearable application. However, it is still a challenge to achieve a supercapacitor with outstanding electrochemical performance and wearability, simultaneously. To solve this problem, we report high-performance flexible and tailorable solid-state supercapacitor enabled by Co3O4@PPy nanorods bundle arrays immobilized on carbon fiber cloth (CFC). Furthermore, a solid-state asymmetric supercapacitor was assembled using freestanding Co3O4@PPy electrode, freestanding porous carbon electrode and PVA gel electrolyte. Benefiting from 3D structure and synergetic contribution of Co3O4 nanorod and electrical conductive PPy layer, the Co3O4@PPy electrode and our developed supercapacitor exhibits high areal capacitance of 6.67 F∙cm-2 at a current density of 2 mA∙cm-2, and 2.47 F∙cm-2 at 4 mA∙cm-2, respectively, and excellent rate capability. More importantly, the solid-state supercapacitor can be tailored into several units and various shapes. Each units retain original electrochemical performance. This work provides a new route to wearable energy-storage technologies

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Publication details

The article was received on 02 Aug 2018, accepted on 11 Sep 2018 and first published on 11 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07477A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Towards High Areal Capacitance, Rate Capability and Tailorable Supercapacitor: Co3O4@Polypyrrole Core-Shell Nanorod Bundle Arrays Electrode

    L. Ma, H. Fan, X. Wei, S. Chen, Q. Hu, Y. Liu, C. Zhi, W. Lu, J. A. Zapien and H. Huang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA07477A

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