期刊
MATERIALS TODAY ENERGY
卷 24, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2022.100951
关键词
Metal-organic frameworks; Wood-carbon; Thick electrode; Supercapacitor
资金
- National Natural Science Foundation of China [22076049, 91745203]
A general strategy is developed to synthesize metal-organic framework composites on wood, which can be used as electrodes for high-performance supercapacitors, exhibiting enhanced areal capacitances and energy densities.
A general strategy is developed to synthesize a family of metal-organic frameworks decorated on wood (MOFs@Wood, MOFs 1/4 ZIF-8, ZIF-67, MOF-74, or MOF-199) composite materials. The carbonized/activated MOFs@Wood derived hierarchical porous composites (C-MOFs@ACW) can be directly used as freestanding thick electrodes of solid symmetric supercapacitors (SSSCs) with enhanced areal capacitances and energy densities. This can be attributed to the combination of the three-dimensional (3D) porous network structure of natural wood and the microporous/mesoporous property of MOFs nanocrystals. Notably, the C-ZIF-8@ACW electrode displays high areal specific capacitances of 12.52 and 8.95 F/cm2 at the current densities of 1 and 20 mA/cm2, respectively. Moreover, a SSSC assembled by two identical C-ZIF-8@ACW electrodes delivers a superior energy density of 0.55 mWh/cm2 at a power density of 0.5 W/cm2, while maintaining 96.8% of initial capacitance over 10,000 cycles. (c) 2022 Elsevier Ltd. All rights reserved.
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