期刊
JOURNAL OF POWER SOURCES
卷 270, 期 -, 页码 675-683出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.07.114
关键词
Manganese oxides; Titania; Supercapacitors; Nanocomposites
资金
- National Natural Science Foundation of China [51104194, 21103127]
- Ministry of Education of China [20110191120014]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars [43]
- National Key laboratory of Fundamental Science of Micro/Nano-device and System Technology (Chongqing University) [2013MS06]
- State Education Ministry and Fundamental Research Funds for the Central Universities (Chongqing University, PR China) [106112013CDJZR120017, CDJZR13130035]
A facile and large-scale strategy of mesoporous birnessite-type manganese dioxide (MnO2) nanosheets on one-dimension (1D) H2Ti3O7 and anatase/TiO2 (B) nanowires (NWs) is developed for high performance supercapacitors. The morphological characteristics of MnO2 nanoflakes on H2Ti3O7 and anatase/TiO2 (B) NWs could be rationally designed with various characteristics (e.g., the sheet thickness, surface area). Interestingly, the MnO2/TiO2 NWs exhibit a more optimized electrochemical performance with specific capacitance of 120 F g(-1) at current density of 0.1 A g(-1) (based on MnO2 + TiO2) than MnO2/H2Ti3O7 NWs. An asymmetric supercapacitor of MnO2/TiO2//activated graphene (AG) yields a better energy density of 29.8 Wh kg(-1) than MnO2/H2Ti3O7//AG asymmetric supercapacitor, while maintaining desirable cycling stability. Indeed, the pseudocapacitive difference is related to the substrates, unique structure and surface area. Especially, the anatase/TiO2 (B) mixed-phase system can provide good electronic conductivity and high utilization of MnO2 nanosheets. (C) 2014 Elsevier B.V. All rights reserved.
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