Towards high areal capacitance, rate capability, and tailorable supercapacitors : Co3O4@polypyrrole core-shell nanorod bundle array electrodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Huiqing Fan
  • Xinying Wei
  • Qingzhao Hu
  • Yan Liu
  • Wei Lu
  • Haitao Huang

Detail(s)

Original languageEnglish
Pages (from-to)19058-19065
Journal / PublicationJournal of Materials Chemistry A
Volume6
Issue number39
Online published11 Sep 2018
Publication statusPublished - 21 Oct 2018

Abstract

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

Citation Format(s)

Towards high areal capacitance, rate capability, and tailorable supercapacitors : Co3O4@polypyrrole core-shell nanorod bundle array electrodes. / Ma, Longtao; Fan, Huiqing; Wei, Xinying; Chen, Shengmei; Hu, Qingzhao; Liu, Yan; Zhi, Chunyi; Lu, Wei; Zapien, Juan Antonio; Huang, Haitao.

In: Journal of Materials Chemistry A, Vol. 6, No. 39, 21.10.2018, p. 19058-19065.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review