Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 140, Issue 26, Pages 8198-8205Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b03235
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Funding
- National Natural Science Foundation of China [51572259]
- National Key R&D Program of China [2016YFB0100100, 2016YFA0200200]
- Recruitment Program of Global Expert (1000 Talent Plan)
- Natural Science Foundation of Liaoning Province [201602737]
- DICP [DICP ZZBS201708, DICP MTO201502]
- DICPQIBEBT [DICPQIBEBT UN201702]
- Dalian National Laboratory For Clean Energy (DNL), CAS
- Exploratory Research Program of Shaanxi Yanchang Petroleum (Group) Co., LTD DICP
- Datong Coal Mine Group Co., Ltd.
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Scalable production of high-quality heteroatom-modified graphene is critical for microscale supercapacitors but remains a great challenge. Herein, we demonstrate a scalable, single-step electrochemical exfoliation of graphite into highly solution-processable fluorine-modified graphene (FG), achieved in an aqueous fluorine-containing neutral electrolyte, for flexible and high-energy-density ionogel-based microsupercapacitors (FGMSCs). The electrochemically exfoliated FG nanosheets are characterized by atomic thinness, large lateral size (up to 12 mu m), a high yield of >70% with <= 3 layers, and a fluorine doping of 3 at%, allowing for large-scale production of FG-MSCs. Our ionogel-based FG-MSCs deliver high energy density of 56 mWh cm(-3), by far outperforming the most reported MSCs. Furthermore, the all-solid-state microdevices offer exceptional cyclability with , similar to 93% after 5000 cycles, robust mechanical flexibility with 100% of capacitance retention bended at 180 degrees, and outstanding serial and parallel integration without the requirement of metal-based interconnects for high-voltage and high-capacitance output. Therefore, these FG-MSCs represent remarkable potential for electronics.
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