TY - JOUR
T1 - Facile Fabrication and High Supercapacitive Performance of Three-Dimensional Mn/MnOx Periodic Arrays Architecture
AU - Cui, Mengya
AU - Huang, Ting
AU - Xiao, Rongshi
AU - Zhang, Xin
AU - Qin, Xiaoyang
AU - Zhang, Qingwei
AU - Xu, Jiejie
AU - Wu, Qiang
N1 - Funding Information:
The authors are grateful to Dr. Delong Ma and Dr. Jinguang Cai for helpful discussions. This work was supported by the National Natural Science Foundation of China (No. 51675013).
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/9/3
Y1 - 2019/9/3
N2 - 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.
AB - 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.
KW - 3D current collector
KW - Femtosecond laser
KW - Manganese oxides
KW - Supercapacitors
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U2 - 10.1021/acssuschemeng.9b02587
DO - 10.1021/acssuschemeng.9b02587
M3 - Article
AN - SCOPUS:85070914479
VL - 7
SP - 14669
EP - 14676
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
SN - 2168-0485
IS - 17
ER -