Hierarchical Cobalt Hydroxide and B/N Co-Doped Graphene Nanohybrids Derived from Metal-Organic Frameworks for High Energy Density Asymmetric Supercapacitors | |
Tabassum, Hassina ; Mahmood, Asif ; Wang, Qingfei ; Xia, Wei ; Liang, Zibin ; Qiu, Bin ; Zhao, Ruo ; Zou, Ruqiang | |
刊名 | SCIENTIFIC REPORTS |
2017 | |
关键词 | DOUBLE-LAYER CAPACITORS CATALYST-FREE SYNTHESIS POROUS CARBON OXYGEN REDUCTION PSEUDOCAPACITIVE PERFORMANCE NANOPOROUS CARBONS FACILE SYNTHESIS NANOWIRE ARRAYS THIN-FILM BORON |
DOI | 10.1038/srep43084 |
英文摘要 | To cater for the demands of electrochemical energy storage system, the development of cost effective, durable and highly efficient electrode materials is desired. Here, a novel electrode material based on redox active beta-Co(OH)(2) and B, N co-doped graphene nanohybrid is presented for electrochemical supercapacitor by employing a facile metal-organic frameworks (MOFs) route through pyrolysis and hydrothermal treatment. The Co(OH)(2) could be firmly stabilized by dual protection of N-doped carbon polyhedron (CP) and B/N co-doped graphene (BCN) nanosheets. Interestingly, the porous carbon and BCN nanosheets greatly improve the charge storage, wettability, and redox activity of electrodes. Thus the hybrid delivers specific capacitance of 1263 F g(-1) at a current density of 1A g(-1) with 90% capacitance retention over 5000 cycles. Furthermore, the new aqueous asymmetric supercapacitor (ASC) was also designed by using Co(OH)(2)@CP@BCN nanohybrid and BCN nanosheets as positive and negative electrodes respectively, which leads to high energy density of 20.25 Whkg(-1). This device also exhibits excellent rate capability with energy density of 15.55 Whkg(-1) at power density of 9331 Wkg(-1) coupled long termed stability up to 6000 cycles.; National Natural Science Foundation of China [51322205, 21371014]; National Program for Support of Top-notch Young Professionals; Beijing Municipal Science & Technology Commission Program [Z151100000915074]; SCI(E); ARTICLE; 7 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/475034] |
专题 | 工学院 |
推荐引用方式 GB/T 7714 | Tabassum, Hassina,Mahmood, Asif,Wang, Qingfei,et al. Hierarchical Cobalt Hydroxide and B/N Co-Doped Graphene Nanohybrids Derived from Metal-Organic Frameworks for High Energy Density Asymmetric Supercapacitors[J]. SCIENTIFIC REPORTS,2017. |
APA | Tabassum, Hassina.,Mahmood, Asif.,Wang, Qingfei.,Xia, Wei.,Liang, Zibin.,...&Zou, Ruqiang.(2017).Hierarchical Cobalt Hydroxide and B/N Co-Doped Graphene Nanohybrids Derived from Metal-Organic Frameworks for High Energy Density Asymmetric Supercapacitors.SCIENTIFIC REPORTS. |
MLA | Tabassum, Hassina,et al."Hierarchical Cobalt Hydroxide and B/N Co-Doped Graphene Nanohybrids Derived from Metal-Organic Frameworks for High Energy Density Asymmetric Supercapacitors".SCIENTIFIC REPORTS (2017). |
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