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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Chem. | doi: 10.3389/fchem.2018.00636

Highly Stable Gully-network Co3O4 Nanowire Arrays as Battery-type Electrode for Outstanding Supercapacitor Performance

Chunli Guo1*, Minshuai Yin1,  Chun Wu2, Jie Li1, Changhui Sun3,  Chuankun Jia2, 4, 5*, Taotao Li1, Lifeng Hou1 and Yinghui Wei1, 6
  • 1College of Materials Science and Engineering, Taiyuan University of Technology, China
  • 2College of Materials Science and Engineering, Changsha University of Science & Technology, China
  • 3School of Chemistry and Chemical Engineering, Qilu Normal University, China
  • 4Changsha University of Science and Technology, China
  • 5Key Laboratory of Advanced Energy Materials Chemistry of Ministry of Education, Nankai University, China
  • 6Taiyuan University of Science and Technology, China

3D transition metal oxides, especially constructed from the interconnected nanowires directly grown on conductive current collectors, are considered to be the most promising electrode material candidates for advanced supercapacitors because 3D network could simultaneously enhance the mechanical and electrochemical performance. The work about design, fabrication, and characterization of 3D gully-network Co3O4 nanowire arrays directly grown on Ni foam using a facile hydrothermal procedure followed by calcination treatment will be introduced. When evaluated as a binder-free battery-type electrode for supercapacitor, a high specific capacity of 582.8 C g-1 at a current density of 1 A g-1, a desirable rate capability with capacity retention about 84.8 % at 20 A g-1, and an outstanding cycle performance of 93.1 % capacity retention after 25,000 cycles can be achieved. More remarkably, an energy density of 33.8 W h kg-1 at a power density of 224 W kg-1 and wonderful cycling stability with 74 % capacity retention after 10,000 cycles can be delivered based on the hybrid-supercapacitor with the as-prepared Co3O4 nanowire arrays as a positive electrode and active carbon as negative electrode. All the unexceptionable supercapacitive behaviors illustrates that our unique 3D gully-network structure Co3O4 nanowire arrays hold a great promise for constructing high-performance energy storage devices.

Keywords: Co3O4 nanowire arrays, gully-network structure, stable cycle performance, supercapacitor, electrode materials

Received: 17 Sep 2018; Accepted: 07 Dec 2018.

Edited by:

Qiaobao Zhang, Xiamen University, China

Reviewed by:

Wei Luo, Donghua University, China
Yuxin Zhang, Chongqing University, China
Shenglin Xiong Xiong, Shandong University, China
Junmin Xu, Zhengzhou University, China  

Copyright: © 2018 Guo, Yin, Wu, Li, Sun, Jia, Li, Hou and Wei. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Prof. Chunli Guo, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, China, guochunli@tyut.edu.cn
Prof. Chuankun Jia, Changsha University of Science and Technology, Changsha, China, jack2012ding@gmail.com