活性炭纤维的表面改性及其电化学性能研究
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摘要
用质量分数65%的浓硝酸分别浸渍炭化前和炭化后的蚕茧,然后在不同温度条件下进行热处理,得到改性活性炭纤维材料。利用低温氮气吸附-脱附仪、傅里叶变换红外光谱仪、扫描电子显微镜和透射电子显微镜对改性前后活性炭纤维材料的孔结构和电化学性能进行分析表征。用循环伏安、交流阻抗和恒流充放电等测试方法研究了活性炭纤维电极材料的炭化温度和炭化顺序对中孔炭孔结构及电化学性能的影响。结果表明:随着炭化温度的升高,活性炭纤维电极材料比表面积和孔容逐渐增加;炭化温度为600℃时,采用先炭化后吸附方法制备的活性炭纤维电极材料比电容可以达到124.56F/g,比先吸附后炭化制备的样品比电容(82.69F/g)提高了约51%。
The effect of properties of porous carbon fibre on electrochemical performance of supercapacitor were studied.The materials were obtained by dipping the natural cocoon(with and without carbonization treatment)using65% nitric acid solution,following by thermal treatment under the different temperature.The pore structure and surface chemical properties of modified electrode materials were characterized by nitrogen adsorption/desorption,FT-IR,SEM and TEM.The electrochemical performance of composites was examined by constant current charge-discharge,cyclic voltammetry and electrochemical impedance spectroscopy.The results showed that with the increase of temperature,the specific surface area and pore volume increased gradually,and the average pore size decreased.When the carbonization temperature was 600℃,the specific capacitance of carbon fiber can reach as high as 124.56 F/g compared to 82.69 F/g that of first carbonized sample,increasing by of 51%.
The effect of properties of porous carbon fibre on electrochemical performance of supercapacitor were studied.The materials were obtained by dipping the natural cocoon(with and without carbonization treatment)using65% nitric acid solution,following by thermal treatment under the different temperature.The pore structure and surface chemical properties of modified electrode materials were characterized by nitrogen adsorption/desorption,FT-IR,SEM and TEM.The electrochemical performance of composites was examined by constant current charge-discharge,cyclic voltammetry and electrochemical impedance spectroscopy.The results showed that with the increase of temperature,the specific surface area and pore volume increased gradually,and the average pore size decreased.When the carbonization temperature was 600℃,the specific capacitance of carbon fiber can reach as high as 124.56 F/g compared to 82.69 F/g that of first carbonized sample,increasing by of 51%.
引文
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[4]Wang Haiyan,Deng Jiang,Xu Chunmei,et al.Ultramicroporous carbon cloth for flexible energy storage with high areal capacitance[J].Energy Storage Materials,2017,7:216-221.
[5]Sun Jinfeng,Huang Yan,Yeung Nga Sze Sea,et al.Recent progress of fiber-shaped asymmetric supercapacitors[J].Materials Today Energy,2017,5:1-14.
[6]Jia Dedong,Yu Xin,Chen Tinghan,et al.High-performance wearable supercapacitors fabricated with surface activated continuous filament graphitefibers[J].Journal of Power Sources,2017,358:13-21.
[7]He Tieshi,Su Qunyan,Zehra Yildiz,et al.Ultrafine carbon fibers with hollow-porous multilayered structure for supercapacitors[J].Electrochimica Acta,2016,222:1120-1127.
[8]Wang Yanqin,Jiang Minghuan,Yang Yunlong,et al.Hybrid electrode material of vanadium nitride and carbon fiber with cigarette butt/metal ions wastes as the precursor for supercapacitors[J].Electrochimica Acta,2016,222:1914-1921.
[9]Tian Xun,Zhu Shan,Peng Jun,et al.Synthesis of micro-and meso-porous carbon derived from cellulose as an electrode material for supercapacitors[J].Electrochimica Acta,2017,241:170-178.
[10]Tang Sufang,Hu Chenglong.Design,preparation and properties of carbon fiber reinforced ultra-high temperature ceramic composites for aerospace applications:a review[J].Journal of Materials Science&Technology,2017,33(2):117-130.
[11]Jedsada Sodtipinta,Chanoknan Ieosakulrat,Natchapol Poonyayant,et al.Interconnected open-channel carbon nanosheets derived from pineapple leaf fiber as a sustainable active material for supercapacitors[J].Industrial Crops&Products,2017,104:13-20.
[12]翟晓玲,宋燕,智林杰,等.硼酸处理对中孔炭的孔结构及电化学性能的影响[J].化工新型材料,2011,39(S1):40-44.
[13]符若文,张永成,方明峰,等.硼酸活化法制备粘胶基活性炭纤维[J].炭素技术,2000(1):1-4.
[14]符若文.磷酸活化粘胶基活性炭纤维的生产//中国材料研究学会.2000年材料科学与工程新进展(上)---2000年中国材料研讨会论文集[C].中国材料研究学会:2000.
[15]郭明晰.煤基多孔炭材料的制备及其电容性能研究[D].乌鲁木齐:新疆大学,2016.
[16]常慧云,赵启成,王文焕,等.St/LA/KH-570三元共聚物的合成及其在碳纤维增强聚丙烯中的应用[J].化工新型材料,2017,45(5):229-231;234.
[17]张雪双.碳纤维的表面修饰及其复合材料界面性能的研究[D].北京:北京化工大学,2016.
[18]张翔.碳基复合电极材料的制备及其在超级电容器中的应用研究[D].合肥:安徽大学,2017.
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