RuO2/聚苯胺复合材料电极的制备及电化学性能表征

以RuCl3·nH2O和苯胺为原料,采用原位聚合法制备了RuO2与聚苯胺(PANI)的纳米复合材料.运用SEM和XRD对样品进行了表征,通过循环伏安法测试了样品的电化学性能.结果表明:不同RuO2含量的复合材料电极的比容量由大到小顺序为3%、1%、10%、2%、7%、5%;RuO2含量为3%时,复合材料电极的比容量达到373.27 F/g,改用活性炭作辅助电极,比容量提高了近10%.     

RuO2／聚苯胺复合材料电极的制备及电化学性能表征

以RuCl3·nH2O和苯胺为原料,采用原位聚合法制备了RuO2与聚苯胺(PANI)的纳米复合材料.运用SEM和XRD对样品进行了表征,通过循环伏安法测试了样品的电化学性能.结果表明不同RuO2含量的复合材料电极的比容量由大到小顺序为3%、1%、10%、2%、7%、5%;RuO2含量为3%时,复合材料电极的比容量达到373.27 F/g,改用活性炭作辅助电极,比容量提高了近10%.     

石墨烯/聚乙撑二氧噻吩纳米复合材料的制备及电化学性能研究

以过硫酸铵为氧化剂,三氯化铁作为掺杂剂,采用原位聚合法制备石墨烯/聚乙撑二氧噻吩纳米复合材料.通过扫描电镜(SEM)、透射电镜(TEM)、红外(IR)光谱对样品的形貌及结构进行表征.结果表明:聚乙撑二氧噻吩纳米颗粒在石墨烯片层上呈均匀分散状态.循环伏安测试法(CV)等电化学测试表明:随着石墨烯质量分数的增加,纳米复合材料电极的电化学性能随之改善,当石墨烯的质量分数为50%时,石墨烯/聚乙撑二氧噻吩纳米复合材料的比电容达到168.8 F/g,显示出较好的电化学活性.     

聚苯胺水凝胶衍生碳/二氧化锰复合材料的合成与电化学性能

以聚苯胺水凝胶衍生碳为载体,通过在载体材料上原位生长二氧化锰,制备了聚苯胺水凝胶衍生碳/二氧化锰复合材料。通过X射线衍射、拉曼光谱、扫描电子显微镜及X射线光电子能谱仪对产物的化学结构、微观形貌和锰元素的价态进行了表征,并利用电化学技术对产物的超级电容性能进行了研究。研究结果表明,其具有较高的比电容（170 F·g^-1）、良好的电化学响应及倍率特性、较低的阻抗,以及较好的循环稳定性（循环1 000次,比电容保持率为94.7%）。本文开发的聚苯胺水凝胶衍生碳/二氧化锰复合材料具有制备方法简单和纳米结构理想等优点,在高性能超级电容器电极材料领域具有良好应用前景。     

碳纳米管导电增强聚乙撑二氧噻吩复合材料的研究

采用原位聚合法以三氯化铁作为掺杂剂,过硫酸铵为氧化剂和引发剂制备碳纳米管/聚乙撑二氧噻吩复合材料.通过扫描电镜（SEM）、透射电镜（TEM）、红外光谱（IR）对样品形貌及结构进行表征,采用循环伏安测试法（CV）研究碳纳米管/聚乙撑二氧噻吩纳米复合材料的电化学行为.结果表明：聚乙撑二氧噻吩纳米颗粒均匀包覆于多壁碳纳米管的表面,形成核壳结构;随碳纳米管含量的增加,复合材料的电化学性能随之改善,当碳纳米管质量分数为28.6％时,碳纳米管/聚乙撑二氧噻吩纳米复合材料的比电容达到179.8 F/g,且电化学活性最好.     

水热法制备聚苯胺/石墨烯复合材料的研究

以氧化石墨烯（GO）与苯胺作为前驱物,在高温高压下一步水热反应,合成了聚苯胺/石墨烯（PANI/Gr）复合材料。利用紫外可见光谱、傅里叶变换红外光谱、扫描电子显微镜研究了PANI/Gr复合材料的结构和微观形貌,进一步利用电化学工作站探究了PANI/Gr复合材料的电化学性能。研究了水热反应时苯胺与GO的投料质量比对所得复合材料的结构与电化学性能的影响。循环伏安法和恒电流充放电测试结果表明由于聚苯胺与石墨烯的相互作用,复合材料的电容性能比单组分的聚苯胺和石墨烯要高。这说明通过GO与苯胺的一步水热反应成功制备了具有优良电容性能的PANI/Gr复合材料。     

纳米结构坡缕石改性聚苯胺超级电容器电极材料的研究

通过原位聚合法制备了超级电容器用坡缕石改性聚苯胺复合电极材料,对其结构和形貌进行了表征,并在1.0mol/L H2SO4溶液中对其电化学性能进行了测试。结果表明,复合材料粒径较聚苯胺减小,分散性提高,比电容随坡缕石含量的增加呈先增大后减小的趋势。在几种不同坡缕石含量的复合材料中,坡缕石含量为1.8%的复合材料比电容达最大。与聚苯胺电容(360F/g)相比,在1.0A/g电流密度下,其比电容提高到485F/g;在3.0A/g电流密度下,其1 000次充放电的电容保持率为75.4%,高于相同条件下聚苯胺的电容保持率(55.7%)。     

石墨烯／氧化锰／聚苯胺微纳米复合材料的制备及其超级电容器性质的研究

本文主要对石墨烯／氧化锰／聚苯胺微纳米复合物作为超级电容器电极材料的制备及其电容性质进行了研究。红外光谱、X一射线光电子能谱和扫描电镜等测试结果表明已成功合成了三元微纳米复合物。通过循环伏安测试和恒电流充放电测试表明石墨烯与氧化锰以1：5的质量比进行复合得到的产物电化学储能性质最好。三元复合时,随着苯胺的增加,三元复合物的充放电时间逐渐增长,苯胺与石墨烯／氧化锰复合材料的质量比为2：1时,复合物的比电容为311F／g,比石墨烯／氧化锰的比电容（171F／g）高出近一倍,由此可知,聚苯胺的加入显著提高了二元复合物的比电容。     

聚苯胺包覆钛酸锂锌负极材料的制备及表征

以钛酸四丁酯、乙酸锌、醋酸锂、苯胺为原料,通过溶胶?凝胶和化学氧化聚合的方法制备了钛酸锂锌/聚苯胺复合材料。利用X射线衍射（XRD）、红外光谱（IR）、扫描电子显微镜（SEM）、透射电镜（TEM）和电化学测试等手段对材料进行了表征及分析。结果表明,复合材料中的聚苯胺为无定型结构,且未引入杂质。当聚苯胺的质量分数为5.3%、电流密度为0.1 A/g时,首次放电比容量为330.0 (mA·h)/g;恒流充放电100圈后,仍然可保持281.3 (mA·h)/g的高放电比容量。     

碳化鸡蛋膜/碳纳米管/二氧化锰复合材料的制备与性能

以天然鸡蛋膜（ESM）为基底,制备了一种具有良好电容性能的碳化鸡蛋膜/碳纳米管（CNTs）/二氧化锰（MnO₂）（cESM/CNTs/MnO₂）复合材料电极。首先将CNTs吸附到ESM上,通过碳化得到cESM/CNTs,再将其与高锰酸钾（KMnO₄）通过氧化还原反应,在cESM/CNTs上生成MnO₂纳米颗粒,最终得到cESM/CNTs/MnO₂复合材料。采用X射线衍射、扫描电子显微镜表征复合材料的微观形貌与结构,通过循环伏安法和计时电位法测试了cESM/CNTs与KMnO₄的质量比不同时制备得到的cESM/CNTs/MnO₂复合材料的电化学性能。实验结果表明:在当cESM/CNTs与KMnO₄的质量比为1∶4时,cESM/CNTs/MnO₂复合材料展现出优异的电容性能,并且在扫描1 000圈后,复合材料的容量保持率高达93.4%。     

Development of supercapacitors based on carbon nanotubes

Block-type electrodes made of carbon nanotubes were fabricated by different processes. The volumetric specific capacitance based on such electrodes reached 107 F/cm3, which proves carbon nanotubes to be ideal candidate materials for supercapacitors. The composite electrodes consisting of carbon nanotubes and RuO2 ·xH2O were developed by the deposition of RuO2 on the surface of carbon nanotubes. Supercapacitors based on the composite electrodes show much higher specific capacitance than those based on pure carbon nanotube ones. A specific capacitance of 600 F/g can be achieved when the weight percent of RuO2· xH2O in the composite electrodes reaches 75% . In addition , supercapacitors based on the composite electrodes show both high energy density and high power density characteristics.     

Pseudo-capacitance of ruthenium oxide/carbon black composites for electrochemical capacitors

Hydrous ruthenium oxide was formed by a new process. The precursor was obtained by mixing the aqueous solutions of RuCl3·xH2O and NaHCO3. The addition of NaHCO3 led to the formation of an oxide with extremely fine RuO2 particles forming a porous network structure in the oxide electrode. Polyethylene glycol was added as a controller to partly inhibit the sol-gel reaction. The rate capacitance of 530 F·g-1 was measured for the powder formed at an optimal annealing temperature of 210°C. Several details concern...     

氮掺杂石墨烯/聚苯胺复合凝胶的制备与性能

为了拓展石墨烯凝胶在超级电容器方面的应用,采用氨水与水合肼作为掺杂剂和还原剂,通过与氧化石墨烯的水热反应制备了氮掺杂石墨烯凝胶,并进一步运用原位聚合的方法在氮掺杂石墨烯凝胶上负载聚苯胺,得到氮掺杂石墨烯/聚苯胺复合凝胶. 利用X射线衍射、扫描电子显微镜对产物的结构和微观形貌进行表征,采用循环伏安、恒电流充放电等方法测试其电化学性能. 结果表明,氮掺杂石墨烯/聚苯胺复合凝胶与纯氮掺杂石墨烯凝胶相比,电化学性能有显著的提高. 当扫描速率为10 mV/s时,复合凝胶的比电容约为500 F/g;在恒电流充放电实验中,当电流密度增加到10 A/g时,复合凝胶的比电容仍然保持在约400 F/g. 当循环伏安扫描1 000圈后,比电容的保持率达到80%. 这些表明氮掺杂石墨烯/聚苯胺复合凝胶拥有突出的电化学性能,也表明了氮掺杂石墨烯/聚苯胺在超级电容器方面将会有很好的应用前景.     

Preparation and electrochemical characterization of C/PANI composite electrode materials

1 INTRODUCTIONRecently , surpercapacitor has attracted greatattention for its unique power performance[1 ,2],while electrode materials ,as one key factor to de-termine the performance of supercapacitor , nowbecome the focus of many researches . The super-capacitor materials can be categorized into threetypes :carbon electrode materials[3], metal oxide e-lectrode materials[4]and conductive polymer elec-trode materials[5].Conductive polymer electrode materials havehigher capacitance than tha…     

Effect of Ni-doping on electrochemical capacitance of MnO2 electrode materials

Mn/Ni composite oxides as active electrode materials for supercapacitors were prepared by solid-state reaction through the reduction of KMnO4 with manganese acetate and nickel acetate at low temperature. The products were characterized by X-ray diffractometry(XRD) and transmission electron microscopy(TEM). The electrochemical characterizations were performed by cyclic voltammetry (CV) and constant current charge-discharge in a three-electrode system. The effects of different potential windows, scan rates, and cycle numbers on the capacitance behavior of Mn0.8Ni0.2Ox composite oxide were also investigated. The results show that the composite oxides are of nano-size and amorphous structure. With increasing the molar ratio of Ni, the specific capacitance goes through a maximum at molar fraction of Ni of 20%. The specific capacitance of Mn0.8Ni0.2Ox composite oxide is 194.5 F/g at constant current discharge of 5 mA.     

Carbonized Zn-MOF/PANI的合成及其电容性能研究

通过简单的方法将煅烧过的金属有机框架(MOF)与聚苯胺(PANI)复合,形成了简单的MOF/PANI复合材料.通过X射线衍射(XRD)、扫描电子显微镜(SEM)、傅立叶转换红外线光谱(FTIR)对其进行了表征,并用循环伏安法(CV)对其电化学性能进行了测试.结果证明了MOF/PANI的比容量在电流密度为1 A/g下可高达477 F/g.     

无尘纸@还原氧化石墨烯/聚苯胺复合材料的制备及性能

以低成本的无尘纸为基底吸附氧化石墨烯,再通过水热处理得到还原氧化石墨烯,最后将苯胺原位聚合到无尘纸@还原氧化石墨烯上,制备得到无尘纸@还原氧化石墨烯/聚苯胺复合材料。运用循环伏安法、恒电流充放电法、阻抗法等测试该复合材料的电化学性能。结果表明,与无尘纸@还原氧化石墨烯相比,无尘纸@还原氧化石墨烯/聚苯胺复合材料的电化学性能有显著提高,在扫描速率为20 mV/s时,比电容达到280 F/g。基于无尘纸@还原氧化石墨烯/聚苯胺复合材料组装的电容器有良好的柔性,充电后可点亮白色LED灯。因此,具有柔性与电容性能的无尘纸@还原氧化石墨烯/聚苯胺复合材料能用于超级电容器领域。     

Synthesis and Characterization of Polyaniline/MgTiO_3 Composite with Excellent Thermal and Electrochemical Performance

This article explores the effects of doping ferroelectric materials MgTiO_3 with different proportions on the properties of polyaniline (PANI).PANI / MgTiO_3 composites were prepared by in-situ composite method.Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to characterize the structure of the composites.Scanning electron microscope (SEM) was used to characterize the morphology of the composites.The thermal stability of the composites was investigated by thermogravimetry (TG) and derivative thermogravimetry (DTG).Electrochemical methods (cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS),and constant current charge-discharge test) were used to compare and analyze the electrochemical performance of the composites.TG-DTG analysis and electrochemical experiments all show that the thermal stability and electrochemical properties of the PANI / MgTiO_3 composite with a mass ratio of 82/18 (w/w) are the best.The results indicate that there is a synergistic effect between PANI and MgTiO_3,which improves the performances of the PANI when the appropriate amount of MgTiO_3 is added.