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摘要
以十二烷基苯磺酸钠(MSDS)为乳化剂,过渡金属氧化物为稳定剂,甲苯为软模板,过硫酸铵为氧化剂,浓盐酸为掺杂剂,采用Pickering乳液法制备了掺杂态聚苯胺颗粒。通过在氧化聚合过程中添加Fe3O4、FeCo2O4、MnCo2O4和ZnCo2O4作为过渡金属氧化物,分别合成了一系列过渡金属掺杂的聚苯胺颗粒。利用XRD、SEM和FT-IR对样品的结构及形貌进行了表征,采用三电极体系测试了一系列聚苯胺的比电容量、充放电性能和阻抗。结果表明,Pickering乳液中添加过渡金属氧化物有利于增大聚苯胺的比电容,减小其阻抗,其中ZnCo2O4对聚苯胺电化学性能的提升效果最显著。在恒流充放电测试下,添加Fe3O4、FeCo2O4、MnCo2O4和ZnCo2O4制备的聚苯胺比电容比纯聚苯胺分别提高了1.54%、57.95%、52.25%和61.76%。在交流阻抗测试中,掺杂过渡金属离子的聚苯胺比不掺杂的阻抗小。
Abstract
Using sodium dodecylbenzene sulfonate as emulsifier,transition metal oxide as stabilizer,toluene as soft template,ammonium persulfate as oxidant,and concentrated hydrochloric acid as dopant,doped state polyaniline(PAN) particles were prepared by Pickering emulsion method.Using Fe3O4,FeCo2O4,MnCo2O4,and ZnCo2O4 as transition metal oxides,a series of PAN were synthesized.The structure and morphology of the samples were characterized by XRD,SEM,and FT-IR,and a three-electrode system was used to test the specific capacitance,charge-discharge performance and impedance of PAN.Results shown that the addition of transition metal oxides in Pickering emulsions was beneficial to increase the specific capacitance of PAN,and reduced its impedance.Among them,ZnCo2O4 had the most significant effect on improving the electrochemical performance of PAN.In the constant current charge and discharge test,the specific capacitance of PAN prepared with Fe3O4,FeCo2O4,MnCo2O4,and ZnCo2O4 increased by 1.54%,57.95%,52.25% and 61.76% respectively,compared with those without addition.In the AC impedance test,the PAN doped with transition metal ions had a lower impedance than the undoped PAN.
关键词
聚苯胺
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过渡金属
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Pickering乳液法
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比电容
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阻抗
Key words
polyaniline
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transition metal
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Pickering emulsion method
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specific capacitance
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impedance
过渡金属掺杂改性聚苯胺的制备及其电化学性能研究[J].
化工新型材料, 2021, 49(5): 73-77 DOI:10.19817/j.cnki.issn 1006-3536.2021.05.017
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