欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以热处理后的煤沥青焦为原料,采用KOH活化法制备了具有较小比表面积（〈200m2/g）的系列微晶炭。采用N2吸附、X射线衍射（XRD）和X射线光电子能谱（XPS）等手段表征了微晶炭的孔结构、微晶结构以及表面化学性质,研究了微晶炭作为超级电容器电极材料在1 mol/L的四乙基四氟化硼酸铵盐/碳酸丙烯酯电解液体系中的电容性能。结果表明：制得的微晶炭具有大量类石墨微晶和较高的石墨化度,d002（晶面层间距）为0.356-0.666 nm,表面含碳量大于95% 活化6 h后,在4.0 V下微晶炭的质量比电容高达139 F/g。微晶炭的储电行为包括插层电容和双电层电容两部分,其中电活化所造成的插层电容是决定微晶炭最终比电容的主要因素,插层电容主要由电极材料的石墨化度决定。
英文摘要：
Crystallite carbons（CCs） with low BET specific surface area（200 m-2/g） have been prepared by KOH activation from pre-heated coal pitch based cokes.The pore structure,crystallite structure and surface chemistry of CCs were investigated by N_2 adsorption,X-ray diffraction（XRD） and X-ray photoelectron spectroscopy（XPS）,respectively.The capacitance performance of CCs as electrode materials for supercapacitors in 1 mol/L tetraethylammonium tetra-fluoroborate/propylene carbonate（Et_4NBF_4/PC） electrolyte was evaluated.Results reveal that CCs have a large amount of graphite-like crystallites and high graphitization degree.The value of d_（002） is in the range of 0.356 to 0.666 nm and the surface carbon contents are above 95%.When activating time is 6 h,the obtained CCs shows maximum mass capacitance of 139 F/g charging at 4.0 V.The energy storage behaviors are mainly composed of intercalation capacitance and electrochemical double-layer capacitance.The intercalation capacitance initiated by ＂electrical activation＂ is the main part of the whole capacitance and the value is determined by graphitization degree of the electrode material.
同期刊论文项目
同项目期刊论文
The superior electrochemical performance of oxygen-rich activated carbons prepared from bituminous c
Molecular design of polymer precursors for controlling microstructure of organic and carbon aerogels
Effect of template and precursor chemistry on pore architectures of triblock copolymer-templated mes
Modification of polystyrene-based activated carbon spheres to improve adsorption of dibenzothiophene
Influence of nitrogen hetero-substitution on the electrochemical performance of coal-based activated
Fabrication of hierarchical porous carbide-derived carbons by chlorination of mesoporous titanium ca
Asymmetric capacitance response from the chemical characteristics of activated carbons in KOH electr
Capacitive matching of pore size and ion size in the negative and positive electrodes for supercapac
New concept of in situ carbide-derived carbon/xerogel nanocomposite materials for electrochemical ca
Facile synthesis of hierarchically structured Fe(3)O(4)/carbon micro-flowers and their application t
Ion Transport Behavior in Triblock Copolymer-Templated Ordered Mesoporous Carbons with Different Por
Genetic algorithm-least squares support vector regression based predicting and optimizing model on c
Preparation of Highly- Conductive CNTs/Polyaniline Composites through Plasma Pretreating and In-situ
Hollow carbon nanospheres prepared by carbonizing polymethylmethacrylate/polyacrylonitrile core/shel
Surface modification of pitch-based spherical activated carbon by CVD of NH3 to improve its adsorpti
Preparation and microstructure control of carbon aerogels produced using m-cresol mediated sol-gel p
期刊信息
位置：