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《化工学报》2017,(7)
导电聚苯胺(PANI)是近十年来研究最多的导电聚合物,具有比容量高、氧化还原可逆性好、电导率高、合成方法简单、成本低等特点,在化学电源和超级电容器中的应用最为广泛。导电聚苯胺复合材料的合成方法主要分为:原位复合法、共混法、自组装和电化学复合法等。导电聚苯胺复合材料可作为高能物质用于研发电极材料,但目前利用导电聚苯胺对锂离子电池三元正极材料进行修饰改性的研究较少。综述了导电聚苯胺及其复合材料的热电化学性能,重点对导电聚苯胺/锂离子电池复合正极材料的性能进行了阐述。最后对导电聚苯胺复合材料的应用和研究方向进行了总结,并简述了导电聚苯胺包覆改性LiNi_(1-x-y)Co_xMn_yO_2复合材料的应用和展望。 相似文献
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聚苯胺/聚丙烯腈导电复合材料的研究 总被引:6,自引:0,他引:6
以过硫酸铵为氧化剂 ,研究了苯胺在聚丙烯腈纤维表面的原位聚合反应制备聚苯胺 /聚丙烯腈导电复合材料的条件。确定了最佳工艺条件 :氧化剂的用量 0 2mol/L、苯胺的浓度 0 1~ 0 3mol/L ,掺杂酸以对甲苯磺酸为最好。聚苯胺 /聚丙烯腈导电复合材料的质量比电阻在 10 4~ 10 5Ω·g/cm2 范围 ,聚苯胺树脂在聚丙烯腈纤维表面呈颗粒分布 ;与聚丙烯腈原纤维材料相比 ,复合材料的断裂强度略有降低 ,而断裂伸长率基本不变 相似文献
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对近两年国内外导电聚苯胺复合材料的研究进展分两部分进行综述,包括针对于其导电性和加工性的优化设计研究和导电聚苯胺在不同领域的新型应用研究。其优化改性分为无机掺杂和高分子共混两种。其应用研究集中在制作导电织物、电磁屏蔽材料、新型金属防腐涂料和装饰电极等。 相似文献
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用乳液聚合法制备聚苯胺/SBS导电复合材料 总被引:6,自引:1,他引:5
在15-20℃下,以十二烷基苯磺酸做乳化剂和掺杂剂,苯胺在溶有SBS的有机溶剂中聚合24h下,可制备聚苯胺/SBS导电复合材料。该复合材料可热成型或溶液成型,所得试样表现出不同的逾渗域值:前者的PAn=-DBSA质量分数为20%,后者为15%; 相似文献
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Polyaniline/nano‐SiO2 particle composites were prepared through ultrasonic irradiation. Polymerization of aniline was conducted under ultrasonic irradiation in the presence of two types of nano‐SiO2: porous nanosilica and spherical nanosilica. The stability of the colloid dispersion, UV–vis spectra, composition, interaction, conductivity, and other characteristics of the composites were examined. It was found that the aggregation of nano‐SiO2 could be reduced under ultrasonic irradiation and that nanoparticles were redispersed in the aqueous solution. The formed polyaniline deposited on the surface of the nanoparticle, which led to a core–shell structure. Two particle morphologies, threadlike aggregates with a few spherical nanoparticles for porous nanosilica and spherical particles with a few sandwichlike particles for spherical nanosilica, were observed. X‐ray photoelectron spectroscopy showed that for two types of composites the ratio of Si atoms to N atoms (Si:N) on the surface was much higher than that in the bulk. The UV–vis spectra of the diluted colloid dispersion of polyaniline/nano‐SiO2 composite particles were similar to those of the polyaniline system. Fourier transform infrared spectroscopy suggested strong interaction between polyaniline and nano‐SiO2. The conductivity of the polyaniline/porous nanosilica (23.1 wt % polyaniline) and polyaniline/spherical nanosilica (20.6 wt % polyaniline) composites was 2.9 and 0.2 S/cm, respectively. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 1811–1817, 2003 相似文献
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聚苯胺/磺化EPDM锌离聚体导电复合物的制备与性能 总被引:1,自引:0,他引:1
在十二烷基苯磺酸存在下,用原位乳液聚合技术聚合苯胺,制得了聚苯胺和磺化乙丙橡胶(EPDM)锌离聚体复合物,EPDM锌离聚体由EPDM磺化及中和制得。用磺化度分别为0.10,0.24,0.40mmol/g的EPDM锌离聚体作为基质制备出各自的复合物,复合物可以熔融热塑加工,其导电率呈现的渗滤阈值为13%,在聚苯胺质量分数相同的情况下,磺化度小的复合物的电导率高于磺化度大的复合物。当磺化度为0.10mmol/g、聚苯胺质量分数为6%~11%和磺化度为0.24mmol/g、聚苯胺质量分数为2%~11%时,复合物表现出热塑性弹性体的行为,扯断伸长率达200%~500%,永久变形小于40%,用间甲酚进行二次掺杂后复合物的电导率有所提高,加入硬脂酸锌会降低复合物的电导率及力学性能。 相似文献
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Conducting poly(acrylamide) films were synthesized by exposing the polyacrylamide films impregnated with ammonium peroxodisulphate, an oxidizing agent, to hydrochloric acid vapor and then to aniline vapor. The effects of varying the exposure time to aniline vapor and the resulting composite films of polyacrylamide–polyaniline were characterized by different methods. The mode of conduction has also been studied. The conductivity of the resulting composites reached up to 10−5 s/cm2. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 841–844, 1998 相似文献
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废旧锂离子电池的回收是近年来资源回收研究领域的热点,但相关回收体系的理论基础研究仍然较为薄弱。其中在热力学研究方面,研究者们大多仍以经典冶金物理化学理论为指导,并借助E-pH图、优势区域图等方法开展研究。本文对该领域已有的较为典型的热力学研究进行综述,详细阐述了热力学研究对废旧锂离子电池常规回收工艺的指导作用以及对三元正极废料选择性提锂、磷酸铁锂正极废料选择性提锂和失效电池材料再生修复等新技术开发的启发性作用。同时,基于对现有锂离子电池回收体系热力学研究的总结和评述,指出了未来锂离子电池回收体系热力学研究亟待解决的关键问题和发展方向。 相似文献