Facile Fabrication and High Supercapacitive Performance of Three-Dimensional Mn/MnOx Periodic Arrays Architecture

Mengya Cui, Ting Huang, Rongshi Xiao, Xin Zhang, Xiaoyang Qin, Qingwei Zhang, Jiejie Xu, Qiang Wu

研究成果: Article査読

抄録

In this paper, 3D-Mn/MnOx periodic arrays architecture is fabricated through a facile and efficient method. A femtosecond laser is used to generate a 3D conductive network on a metallic manganese surface which also serves as the current collector (3D-Mn), followed by chemical oxidation to form Mn2O3 and MnO2 on the surface of the 3D-Mn. Detailed electrochemical characterization reveals that the 3D-Mn/MnOx electrode exhibits good rate performance and cycle life, and the assembled 3D-Mn/MnOx supercapacitor can deliver the highest energy density of 5.6 μWh/cm2 at a power density of 21.8 μW/cm2. The enhanced performance is attributed to the unique periodic 3D-Mn/MnOx architecture which largely increases the effective electrode surface area, shortens the electron/ion transportation distance, facilitates electrolyte permeation, and reduces the contact resistance between 3D-Mn and MnOx. Importantly, MnOx is formed directly on the 3D-Mn surface, which helps to maintain the structural integrity and mechanical adhesion between each other, and thus is beneficial to long-term electrochemical cycling.

本文言語English
ページ(範囲)14669-14676
ページ数8
ジャーナルACS Sustainable Chemistry and Engineering
7
17
DOI
出版ステータスPublished - 2019 9 3
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 環境化学
  • 化学工学(全般)
  • 再生可能エネルギー、持続可能性、環境

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