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Title: Liquid crystalline phase synthesis of nanoporous MnO{sub 2} thin film arrays as an electrode material for electrochemical capacitors

Abstract

Graphical abstract: Three-dimensional (3D) MnO{sub 2} thin film arrays with nanoporous structure is electrodeposited on Ti foil from hexagonal lyotropic liquid crystalline phase. Low-angle X-ray diffraction (XRD), wide-angle XRD, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) are employed to study the morphology and the structure of the as-synthesized MnO{sub 2} materials. Galvanostatic charge/discharge measurements show the nanoporous, 3D electrode material exhibits excellent capacitive performance between the potential range of −0.1 to 0.9 V, and a maximum specific capacitance as high as 462 F g{sup −1} are achieved in 0.5 M Na{sub 2}SO{sub 4} solution at a charge/discharge current density of 4 A g{sup −1}. Highlights: ► 3D MnO{sub 2} thin film arrays with nanoporous structure is fabricated for the first time. ► A maximum specific capacitance as high as 462 F g{sup −1} is obtained. ► The 3D and nanoporous superarchitecture facilitate electrolyte penetration. -- Abstract: Three-dimensional (3D) MnO{sub 2} thin film arrays with nanoporous structure is electrodeposited on Ti foil from hexagonal lyotropic liquid crystalline phase. Low-angle X-ray diffraction (XRD), wide-angle XRD, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) are employed to study the morphology and the structure of the as-synthesizedmore » MnO{sub 2} materials. Galvanostatic charge/discharge measurements show the nanoporous, 3D electrode material exhibits excellent capacitive performance between the potential range of −0.1 to 0.9 V, and a maximum specific capacitance as high as 462 F g{sup −1} are achieved in 0.5 M Na{sub 2}SO{sub 4} solution at a charge/discharge current density of 4 A g{sup −1}.« less

Authors:
 [1];  [2];  [3];  [1];  [2]; ;  [1]; ;  [4]
  1. College of Science, China University of Petroleum, Qingdao, Shandong 266555 (China)
  2. (China)
  3. School of Geosciences, China University of Petroleum, Qingdao, Shandong 266555 (China)
  4. College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (China)
Publication Date:
OSTI Identifier:
22215545
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; CURRENT DENSITY; ELECTRODEPOSITION; ELECTRODES; FIELD EMISSION; MANGANESE OXIDES; SCANNING ELECTRON MICROSCOPY; SODIUM SULFATES; SYNTHESIS; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Yang, Guangwu, E-mail: yanggw@upc.edu.cn, Key Laboratory of New Energy Physics and Materials Science in Universities of Shandong, China University of Petroleum, Qingdao, Shandong 266555, Wang, Baoli, Guo, Wenyue, E-mail: wyguo@upc.edu.cn, Key Laboratory of New Energy Physics and Materials Science in Universities of Shandong, China University of Petroleum, Qingdao, Shandong 266555, Bu, Zhongheng, Miao, Chengcheng, Xue, Tong, and Li, Hulin. Liquid crystalline phase synthesis of nanoporous MnO{sub 2} thin film arrays as an electrode material for electrochemical capacitors. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.08.023.
Yang, Guangwu, E-mail: yanggw@upc.edu.cn, Key Laboratory of New Energy Physics and Materials Science in Universities of Shandong, China University of Petroleum, Qingdao, Shandong 266555, Wang, Baoli, Guo, Wenyue, E-mail: wyguo@upc.edu.cn, Key Laboratory of New Energy Physics and Materials Science in Universities of Shandong, China University of Petroleum, Qingdao, Shandong 266555, Bu, Zhongheng, Miao, Chengcheng, Xue, Tong, & Li, Hulin. Liquid crystalline phase synthesis of nanoporous MnO{sub 2} thin film arrays as an electrode material for electrochemical capacitors. United States. doi:10.1016/J.MATERRESBULL.2012.08.023.
Yang, Guangwu, E-mail: yanggw@upc.edu.cn, Key Laboratory of New Energy Physics and Materials Science in Universities of Shandong, China University of Petroleum, Qingdao, Shandong 266555, Wang, Baoli, Guo, Wenyue, E-mail: wyguo@upc.edu.cn, Key Laboratory of New Energy Physics and Materials Science in Universities of Shandong, China University of Petroleum, Qingdao, Shandong 266555, Bu, Zhongheng, Miao, Chengcheng, Xue, Tong, and Li, Hulin. Thu . "Liquid crystalline phase synthesis of nanoporous MnO{sub 2} thin film arrays as an electrode material for electrochemical capacitors". United States. doi:10.1016/J.MATERRESBULL.2012.08.023.
@article{osti_22215545,
title = {Liquid crystalline phase synthesis of nanoporous MnO{sub 2} thin film arrays as an electrode material for electrochemical capacitors},
author = {Yang, Guangwu, E-mail: yanggw@upc.edu.cn and Key Laboratory of New Energy Physics and Materials Science in Universities of Shandong, China University of Petroleum, Qingdao, Shandong 266555 and Wang, Baoli and Guo, Wenyue, E-mail: wyguo@upc.edu.cn and Key Laboratory of New Energy Physics and Materials Science in Universities of Shandong, China University of Petroleum, Qingdao, Shandong 266555 and Bu, Zhongheng and Miao, Chengcheng and Xue, Tong and Li, Hulin},
abstractNote = {Graphical abstract: Three-dimensional (3D) MnO{sub 2} thin film arrays with nanoporous structure is electrodeposited on Ti foil from hexagonal lyotropic liquid crystalline phase. Low-angle X-ray diffraction (XRD), wide-angle XRD, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) are employed to study the morphology and the structure of the as-synthesized MnO{sub 2} materials. Galvanostatic charge/discharge measurements show the nanoporous, 3D electrode material exhibits excellent capacitive performance between the potential range of −0.1 to 0.9 V, and a maximum specific capacitance as high as 462 F g{sup −1} are achieved in 0.5 M Na{sub 2}SO{sub 4} solution at a charge/discharge current density of 4 A g{sup −1}. Highlights: ► 3D MnO{sub 2} thin film arrays with nanoporous structure is fabricated for the first time. ► A maximum specific capacitance as high as 462 F g{sup −1} is obtained. ► The 3D and nanoporous superarchitecture facilitate electrolyte penetration. -- Abstract: Three-dimensional (3D) MnO{sub 2} thin film arrays with nanoporous structure is electrodeposited on Ti foil from hexagonal lyotropic liquid crystalline phase. Low-angle X-ray diffraction (XRD), wide-angle XRD, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) are employed to study the morphology and the structure of the as-synthesized MnO{sub 2} materials. Galvanostatic charge/discharge measurements show the nanoporous, 3D electrode material exhibits excellent capacitive performance between the potential range of −0.1 to 0.9 V, and a maximum specific capacitance as high as 462 F g{sup −1} are achieved in 0.5 M Na{sub 2}SO{sub 4} solution at a charge/discharge current density of 4 A g{sup −1}.},
doi = {10.1016/J.MATERRESBULL.2012.08.023},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 11,
volume = 47,
place = {United States},
year = {2012},
month = {11}
}