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Carbon–Heteroatom Bond Formation by an Ultrasonic Chemical Reaction for Energy Storage Systems
Author(s) -
Kim HyunTak,
Shin HyeonOh,
Jeon InYup,
Yousaf Masood,
Baik Jaeyoon,
Cheong HaeWon,
Park Noejung,
Baek JongBeom,
Kwon TaeHyuk
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201702747
Subject(s) - materials science , graphene , carbon nanotube , chemical engineering , chemical bond , nanomaterials , inert gas , heteroatom , carbon fibers , nanotechnology , energy storage , oxide , supercapacitor , chemical vapor deposition , electrode , capacitance , composite material , organic chemistry , composite number , chemistry , ring (chemistry) , power (physics) , physics , quantum mechanics , engineering , metallurgy
The direct formation of CN and CO bonds from inert gases is essential for chemical/biological processes and energy storage systems. However, its application to carbon nanomaterials for improved energy storage remains technologically challenging. A simple and very fast method to form CN and CO bonds in reduced graphene oxide (RGO) and carbon nanotubes (CNTs) by an ultrasonic chemical reaction is described. Electrodes of nitrogen‐ or oxygen‐doped RGO (N‐RGO or O‐RGO, respectively) are fabricated via the fixation between N 2 or O 2 carrier gas molecules and ultrasonically activated RGO. The materials exhibit much higher capacitance after doping (133, 284, and 74 F g −1 for O‐RGO, N‐RGO, and RGO, respectively). Furthermore, the doped 2D RGO and 1D CNT materials are prepared by layer‐by‐layer deposition using ultrasonic spray to form 3D porous electrodes. These electrodes demonstrate very high specific capacitances (62.8 mF cm −2 and 621 F g −1 at 10 mV s −1 for N‐RGO/N‐CNT at 1:1, v/v), high cycling stability, and structural flexibility.