期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 848, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2019.113301
关键词
MOF; All-solid-state supercapacitors; CNT; Self-supporting
资金
- Foundation of China [NSFC 51701173]
- Project of Colleges and Universities in Henan National Natural Science Key Scientific Research Province [18A530004]
A new hybrid structure of Ni-MOF and CNT (Ni-MOF@CNT) was firstly in-situ synthesized on the graphene/Ni foam (GN) substrate and a novel self-supporting material of Ni-MOF@CNT/GN was obtained. Furthermore, its application as a new electrode material for all-solid-state supercapacitors was also investigated for the first time. An ultrahigh energy density of 0.3396 mWhcm(-2) can be achieved as the best value reported for MOF-based allsolid-state supercapacitors to date. Moreover, high capacitance values of 898 and 230 mFcm(-2) can be obtained at 1 and 20 mAcm(-2), respectively, and a high retention value of 93% can be also maintained even after 4000 cycles. Such a high electrochemical performance may be ascribed to high conductivity of the CNT, electron transport effect of the graphene layer, porous characteristic of the Ni-MOF@CNT/GN material and changes of oxygen-containing groups in the hybrid structure.
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