Synthesis of 3D Mesoporous Wall-Like MnO2 with Improved Electrochemical Performance
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- 作者：Hongmei Wei ; Jinxing Wang ; Shengwei Yang ; Weifang Wang…
- 关键词：Mesoporous ; ultrathin nanosheets ; δ ; MnO2 ; supercapacitors
- 刊名：Journal of Electronic Materials
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：46
- 期：3
- 页码：1539-1545
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics;
- 出版者：Springer US
- ISSN：1543-186X
- 卷排序：46
文摘
Manganese dioxide (MnO2) with mesoporous framework self-assembled by ultrathin nanosheets was synthesized via a facile hydrothermal strategy without any binders and substrates. The wall-like structure of this electrode material for supercapacitors can provide more attaching points for active material and shorten the diffusion paths of electrons and ions, leading to a high specific capacitance (SC) of 400 F g−1 at current density of 1 A g−1 and the good cyclic stability up to 3000 cycles. Meanwhile, the relationships among structure, specific surface area, pore size and electrochemical properties have been discussed. It indicated that three-dimensional (3D) wall-like δ-MnO2 is a promising electrochemical electrode candidate for supercapacitors.