Porous MnO2 hollow spheres constructed by nanosheets and their application in electrochemical capacitors

被引：30

作者：

Bian, Shao-Wei ^{[1
]}

Zhao, Ya-Ping ^{[1
]}

Xian, Chun-Ying ^{[1
]}

机构：

[1] Donghua Univ, Coll Chem Chem Engn & Biotechnol, Shanghai 201620, Peoples R China

来源：

MATERIALS LETTERS | 2013年 / 111卷

关键词：

Porous materials; Carbon materials; MnO2; Hydrothermal synthesis; Electrochemical capacitors; CARBON SPHERES;

D O I：

10.1016/j.matlet.2013.08.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Porous MnO2 hollow spheres were successfully prepared by hydrothermal synthesis using hollow carbon spheres as the template. The morphology and structure of the porous MnO2 hollow spheres were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), nitrogen adsorption-desorption analysis. The electrochemical studies indicated that the porous MnO2 hollow spheres have an excellent capacitive performance and high specific capacitance of 352 F/g at the current density of 0.5 A/g. The superior capacitive performance is related to the advantageous structure of porous MnO2 hollow spheres constructed by nanosheets, which were preferred in decreasing ion transfer resistance, shortening diffusion distance as well as improving electron conductivity. These advantages endow this material with good capacitive performance. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：75 / 77

页数：3

共 14 条

[1] Zinc Oxide/Reduced Graphene Oxide Composites and Electrochemical Capacitance Enhanced by Homogeneous Incorporation of Reduced Graphene Oxide Sheets in Zinc Oxide Matrix [J].

Chen, Yan-Li ;

Hu, Zhong-Ai ;

Chang, Yan-Qin ;

Wang, Huan-Wen ;

Zhang, Zi-Yu ;

Yang, Yu-Ying ;

Wu, Hong-Ying .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (05) :2563-2571

[2] Self-assembled manganese dioxide nanowires as electrode materials for electrochemical capacitors [J].

Chin, Suk Fun ;

Pang, Suh Cem ;

Anderson, Marc A. .

MATERIALS LETTERS, 2010, 64 (24) :2670-2672

[3] Ultrathin MnO2 nanofibers grown on graphitic carbon spheres as high-performance asymmetric supercapacitor electrodes [J].

Lei, Zhibin ;

Zhang, Jintao ;

Zhao, X. S. .

JOURNAL OF MATERIALS CHEMISTRY, 2012, 22 (01) :153-160

[4] Co3O4 Nanowire@MnO2 Ultrathin Nanosheet Core/Shell Arrays: A New Class of High-Performance Pseudocapacitive Materials [J].

Liu, Jinping ;

Jiang, Jian ;

Cheng, Chuanwei ;

Li, Hongxing ;

Zhang, Jixuan ;

Gong, Hao ;

Fan, Hong Jin .

ADVANCED MATERIALS, 2011, 23 (18) :2076-+

[5] Dopamine as a Carbon Source: The Controlled Synthesis of Hollow Carbon Spheres and Yolk-Structured Carbon Nanocomposites [J].

Liu, Rui ;

Mahurin, Shannon M. ;

Li, Chen ;

Unocic, Raymond R. ;

Idrobo, Juan C. ;

Gao, Hongjun ;

Pennycook, Stephen J. ;

Dai, Sheng .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2011, 50 (30) :6799-6802

[6] Nanostructured MnO2/graphene composites for supercapacitor electrodes: the effect of morphology, crystallinity and composition [J].

Mao, Lu ;

Zhang, Kai ;

Chan, Hardy Sze On ;

Wu, Jishan .

JOURNAL OF MATERIALS CHEMISTRY, 2012, 22 (05) :1845-1851

[7] Hierarchical Manganese Oxide/Carbon Nanocomposites for Supercapacitor Electrodes [J].

Peng, Yiting ;

Chen, Zheng ;

Wen, Jing ;

Xiao, Qiangfeng ;

Weng, Ding ;

He, Shiyu ;

Geng, Hongbin ;

Lu, Yunfeng .

NANO RESEARCH, 2011, 4 (02) :216-225

[8] Hydrothermal synthesis and pseudocapacitance properties of MnO2 nanostructures [J].

Subramanian, V ;

Zhu, HW ;

Vajtai, R ;

Ajayan, PM ;

Wei, BQ .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (43) :20207-20214

[9] MoO3 nanoparticles distributed uniformly in carbon matrix for supercapacitor applications [J].

Tao, Tao ;

Chen, QiYuan ;

Hu, HuiPing ;

Chen, Ying .

MATERIALS LETTERS, 2012, 66 (01) :102-105

[10] Fast and reversible surface redox reaction of graphene-MnO2 composites as supercapacitor electrodes [J].

Yan, Jun ;

Fan, Zhuangjun ;

Wei, Tong ;

Qian, Weizhong ;

Zhang, Milin ;

Wei, Fei .

CARBON, 2010, 48 (13) :3825-3833

← 1 2 →