期刊
SCIENTIFIC REPORTS
卷 8, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-018-20096-8
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资金
- MSIP (Ministry of Science, ICT and Future Planning)
- NST (National Research Council of Science & Technology) of Republic Korea [CAP-13-02-ETRI]
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2016M3A7B4027712]
- National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2016R1D1A1B01008736]
- National Research Foundation of Korea [2016M3A7B4027711] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Here, we present a facile and low-cost method to produce hierarchically porous graphene-based carbons from a biomass source. Three-dimensional (3D) graphene-based carbons were produced through continuous sequential steps such as the formation and transformation of glucose-based polymers into 3D foam-like structures and their subsequent carbonization to form the corresponding macroporous carbons with thin graphene-based carbon walls of macropores and intersectional carbon skeletons. Physical and chemical activation was then performed on this carbon to create micro-and meso-pores, thereby producing hierarchically porous biomass-derived graphene-based carbons with a high Brunauer-Emmett-Teller specific surface area of 3,657 m(2) g(-1). Owing to its exceptionally high surface area, interconnected hierarchical pore networks, and a high degree of graphitization, this carbon exhibited a high specific capacitance of 175 F g(-1) in ionic liquid electrolyte. A supercapacitor constructed with this carbon yielded a maximum energy density of 74 Wh kg(-1) and a maximum power density of 408 kW kg(-1), based on the total mass of electrodes, which is comparable to those of the state-of-the-art graphene-based carbons. This approach holds promise for the low-cost and readily scalable production of high performance electrode materials for supercapacitors.
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