期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 303, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2020.110257
关键词
Flexible materials; Carbon heteroarchitecture; Metal-organic frameworks; Biomass materials; Flexible supercapacitor
类别
资金
- Primary Research and Development Program of the Science and Technology Development Program Project of Jilin Province in 2017 [20170203001SF]
- Scientific Research Foundation of Suzhou University [2016XJXS05, 2018SZXYDZXZ02]
- Outstanding Youth Talents in Anhui Provincial Education Department [2017GXBJZD47]
- Natural Science Foundation Project of Jilin Provincial Science and Technology Development Plan [20190201277JC]
- Science and Technology Innovation Development Plan of Jilin City [201830811]
- Key Discipline of Material Science and Engineering of Suzhou University [2017XJZDXK3]
- Innovative Research Team of the Anhui Provincial Education Department [2016SCXPTTD]
- Global Connections Fund (Bridging Grant Scheme) of the Australian Academy of Technology and Engineering (ATSE) in 2019
The exploration of new-family flexible carbon architectures is significant with regard to flexible electrochemical capacitors. Herein we show the carbonization of core-shell structured metal-organic frameworks (MOFs) (i.e., ZIF-8@ZIF-67) on a waste biomass of cosmetic cotton to prepare flexible nitrogen-doped carbon heteroarchitectures (hetero-fNCs) that possess high supercapacitive properties, including a high energy density of 30 Wh kg(-1) at 1440 W kg(-1) and good capacitance retention of 89.5% after 5000 cycles. Our elaborately designed hetero-fNCs demonstrate multiple advantages: (i) The outer-layer ZIF-67-derived mesoporous carbons show abundant mesopores, providing abundant ion-diffusion pathways for mass transport and rich graphite microstructures, improving electrical conductivity for electron transfer; (ii) the inter-layer ZIF-8-derived microporous carbons possess a mass of micropores for more charge storage; (iii) the inner-layer cosmetic cotton-derived flexible carbons afford good mechanical flexibility, guaranteeing performance stability during use; and (iv) the plentiful nitrogen dopants within all carbon components increase the capacitance through their pseudocapacitive contribution. As a consequence, the flexible supercapacitor based on hetero-fNCs exhibits high energy and power densities, as well as good bending stability, highlighting the significance of MOFs and flexible biomass materials.
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