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Carbon v.132, 2018년, pp.698 - 708   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Ultrafast hydrothermal assembly of nanocarbon microfibers in near-critical water for 3D microsupercapacitors

Zhai, Shengli (School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, 2006, Australia ) ; Wei, Li (School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, 2006, Australia ) ; Karahan, H. Enis (School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore ) ; Wang, Yanqing (Faculty of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-0032, Japan ) ; Wang, Chaojun (School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, 2006, Australia ) ; Montoya, Alejandro (School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales, 2006, Australia ) ; Shao, Qian (College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China ) ; Wang, Xin (School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore ) ; Chen, Yuan (School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney ) ;
  • 초록  

    Abstract Translating the advantages of carbon nanomaterials into macroscopic energy storage devices is challenging because the desirable nanoscale properties often disappear during assembly processes. Here we describe a new nonequilibrium subcritical hydrothermal method capable of independently manipulating the temperature and pressure to create unique assembly conditions crossing the commonly used liquid-vapor boundary. Highly conductive and dense-packed yet ion-accessible nanocarbon microfibers can be obtained from graphene oxide sheets, single-walled carbon nanotubes, and a nitrogen-doping crosslinker under 20 min of hydrothermal assembly, 80% energy saving compared to standard hydrothermal methods, and one of the shortest time in the field of hydrothermal processing of carbon nanomaterials. Using those microfibers, we built microsupercapacitors that reach a high volumetric capacitance of 52 F cm −3 , energy density of 7.1 mWh cm −3 , and power density of 1645.7 mW cm −3 , respectively. We further demonstrate the 3D integration of multiple fiber microsupercapacitors that reduces the device footprint by 75% while expanding the operational voltage and current window. This strategy is a promising tool for harmoniously assembling carbon nanostructures as energy storage components for various energy applications. Graphical abstract A new hydrothermal system is capable of controlling the temperature and pressure of water independently to create unique hydrothermal assembly conditions for achieving ultrafast assembly of carbon nanomaterials into carbon architectures. [DISPLAY OMISSION]


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