期刊
NANO RESEARCH
卷 8, 期 3, 页码 990-1004出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-014-0581-1
关键词
nanosheets; manganese oxide; chemical bath deposition; SnO2 nanobelts; supercapacitor
类别
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2012R1A2A2A01045382, 2010-0029027]
- National Research Foundation of Korea [2012R1A2A2A01045382, 2010-0029027] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Recent efforts have focused on the fabrication and application of three-dimensional (3-D) nanoarchitecture electrodes, which can exhibit excellent electrochemical performance. Herein, a novel strategy towards the design and synthesis of size-and thickness-tunable two-dimensional (2-D) MnO2 nanosheets on highly conductive one-dimensional (1-D) backbone arrays has been developed via a facile, one-step enhanced chemical bath deposition (ECBD) method at a low temperature (similar to 50 degrees C). Inclusion of an oxidizing agent, BrO3-, in the solution was crucial in controlling the heterogeneous nucleation and growth of the nanosheets, and in inducing the formation of the tailored and uniformly arranged nanosheet arrays. We fabricated supercapacitor devices based on 3-D MnO2 nanosheets with conductive Sb-doped SnO2 nanobelts as the backbone. They achieved a specific capacitance of 162 F.g(-1) at an extremely high current density of 20 A.g(-1), and good cycling stability that shows a capacitance retention of similar to 92% of its initial value, along with a coulombic efficiency of almost 100% after 5,000 cycles in an aqueous solution of 1 M Na2SO4. The results were attributed to the unique hierarchical structures, which provided a short diffusion path of electrolyte ions by means of the 2-D sheets and direct electrical connections to the current collector by 1-D arrays as well as the prevention of aggregation by virtue of the well-aligned 3-D structure.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据