A high energy density asymmetric supercapacitor based on a CoNi-layered double hydroxide and activated carbon
Publication date: February 2016 Source:New Carbon Materials, Volume 31, Issue 1 Author(s): Li-jing Xie, Guo-hua Sun, Long-fei Xie, Fang-yuan Su, Xiao-ming Li, Zhuo Liu, Qing-qiang Kong, Chun-xiang Lu, Kai-xi Li, Cheng-meng Chen A high performance asymmetric supercapacitor was fabricated using a CoNi-layered double hydroxide (CoNi-LDH) as the positive electrode and activated carbon as the negative electrode in an electrolyte of 6 M aqueous KOH. The supercapacitor can be cycled reversibly in a wide potential window of 0-1.5 V and exhibits a remarkable energy density of 46.3 Wh·kg−1 at a power densi...
Source: New Carbon Materials - March 10, 2016 Category: Chemistry Source Type: research
Growth of carbon nanotubes on graphene by chemical vapor deposition
Publication date: February 2016 Source:New Carbon Materials, Volume 31, Issue 1 Author(s): Jian-guo Zhao, Bao-yan Xing, Hui Yang, Qi-liang Pan, Zuo-peng Li, Zhan-jun Liu Graphite oxide powder impregnated with an Ni(NO3)2 solution was freeze-dried, thermally-reduced at 300 oC and then chemical-vapor deposition at 1000 oC was used to grow carbon nanotubes (CNTs) on graphene using methane as the carbon source. The morphology and electrical conductivities of the graphite oxide, reduced graphene and CNT-graphene hybrids were characterized. Results indicate that the density of CNTs on the graphene and the electri...
Source: New Carbon Materials - March 10, 2016 Category: Chemistry Source Type: research
Preparation of dopamine-functionalized multi-wall carbon nanotube/poly(amide-imide) composites and their thermal and mechanical properties
Publication date: February 2016 Source:New Carbon Materials, Volume 31, Issue 1 Author(s): Shadpour Mallakpour, Amin Zadehnazari Covalent functionalization of MWCNT-COOH with dopamine was conducted by microwave irradiation and the dopamine-functionalized MWCNTs (MWCNT-Dop) were used as fillers in poly(amide-imide) (PAI) to improve its thermal and mechanical properties. Results indicate that the MWCNT-Dop is dispersed in PAI very well, which is ascribed to a good interfacial interaction between the MWCNT-Dop and PAI by hydrogen bonding. The temperatures at which 10 wt% weight loss occurs, and the limiting oxygen ind...
Source: New Carbon Materials - March 10, 2016 Category: Chemistry Source Type: research
The use of ZnCl2 activation to prepare low-cost porous carbons coated on glass fibers using mixtures of Novolac, polyethylene glycol and furfural as carbon precursors
Publication date: December 2015 Source:New Carbon Materials, Volume 30, Issue 6 Author(s): Xiao-qun Wei, Qi-han Li, Hai-chao Li, Hui-jun Li, Shui-xia Chen Using ZnCl2 as an activation agent, low-cost porous carbons were prepared using mixtures of Novolac, polyethylene glycol (PEG) and furfural in alcohol as carbon precursors that were coated onto glass fiber mats. The morphology, microcrystalline structure, pore structure, surface chemistry, mechanical strength and adsorption properties of the porous carbons were characterized. Results show that the addition of furfural and PEG to the carbon precursors greatl...
Source: New Carbon Materials - January 24, 2016 Category: Chemistry Source Type: research
Preparation of graphene/metal-organic composites and their adsorption performance for benzene and ethanol
Publication date: December 2015 Source:New Carbon Materials, Volume 30, Issue 6 Author(s): Guo-qiang Liu, Ming-xi Wan, Zheng-hong Huang, Fei-yu Kang Graphene/metal-organic composites were synthesized by a solvothermal method and characterized by nitrogen adsorption, SEM and IR and their adsorption properties for benzene and ethanol were investigated. It was found that the surface area and pore volume both have maximum values for a graphene oxide (GO) percentage of 5.25 wt%. The composites have high adsorption capacities for both benzene and ethanol, and the maximum uptakes reach 72 and 77 cm3/g, respectively. T...
Source: New Carbon Materials - January 24, 2016 Category: Chemistry Source Type: research
