Asymmetric Supercapacitors Based on Graphene/MnO2 Nanospheres and Graphene/MoO3 Nanosheets with High Energy Density
文献类型：期刊论文
| 作者 | Chang, J ; Jin, M ; Yao, F ; Kim, TH ; Le, VT ; Yue, H ; Gunes, F ; Li, B ; Ghosh, A ; Xie, S ; Lee, YH |
| 刊名 | ADVANCED FUNCTIONAL MATERIALS
 |
| 出版日期 | 2013 |
| 卷号 | 23期号:40页码:5074 |
| 关键词 | graphene asymmetric supercapacitors metal oxides work functions |
| ISSN号 | 1616-301X |
| 通讯作者 | Chang, J (reprint author), Inst Basic Sci, IBS Ctr Integrated Nanostruct Phys, Taejon 305701, South Korea. |
| 中文摘要 | Asymmetric supercapacitors with high energy density are fabricated using a self-assembled reduced graphene oxide (RGO)/MnO2 (GrMnO(2)) composite as a positive electrode and a RGO/MoO3 (GrMoO(3)) composite as a negative electrode in safe aqueous Na2SO4 electrolyte. The operation voltage is maximized by choosing two metal oxides with the largest work function difference. Because of the synergistic effects of highly conductive graphene and highly pseudocapacitive metal oxides, the hybrid nanostructure electrodes exhibit better charge transport and cycling stability. The operation voltage is expanded to 2.0 V in spite of the use of aqueous electrolyte, revealing a high energy density of 42.6 Wh kg(-1) at a power density of 276 W kg(-1) and a maximum specific capacitance of 307 F g(-1), consequently giving rise to an excellent Ragone plot. In addition, the GrMnO(2)//GrMoO(3) supercapacitor exhibits improved capacitance with cycling up to 1000 cycles, which is explained by the development of micropore structures during the repetition of ion transfer. This strategy for the choice of metal oxides provides a promising route for next-generation supercapacitors with high energy and high power densities. |
| 资助信息 | Research Center Program of Institute for Basic Science (IBS); World Class University (WCU) program of the National Research Foundation of Korea (NRF) [2008-000-10029-0]; Ministry of Education, Science and Technology (MEST) of Korea |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/56787]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Chang, J,Jin, M,Yao, F,et al. Asymmetric Supercapacitors Based on Graphene/MnO2 Nanospheres and Graphene/MoO3 Nanosheets with High Energy Density[J]. ADVANCED FUNCTIONAL MATERIALS,2013,23(40):5074. |
| APA | Chang, J.,Jin, M.,Yao, F.,Kim, TH.,Le, VT.,...&Lee, YH.(2013).Asymmetric Supercapacitors Based on Graphene/MnO2 Nanospheres and Graphene/MoO3 Nanosheets with High Energy Density.ADVANCED FUNCTIONAL MATERIALS,23(40),5074. |
| MLA | Chang, J,et al."Asymmetric Supercapacitors Based on Graphene/MnO2 Nanospheres and Graphene/MoO3 Nanosheets with High Energy Density".ADVANCED FUNCTIONAL MATERIALS 23.40(2013):5074. |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。