电极材料是电容法去离子(CDI)技术的核心。为了提高聚吡咯(PPy)的吸附容量、电化学稳定性及其使用寿命,将壳聚糖(CS)和PPy复合制得PPy/CS复合导电材料。采用扫描电子显微镜(SEM)、红外光谱(FT-IR)和循环伏安法(CV)对PPy/CS复合导电材料进行表征。重点考察了氧化剂、CS、PPy及掺杂剂的用量对复合材料性能的影响规律。结果表明:PPy与CS结合形成了性能优良的导电聚合物复合材料;以三氯化铁(FeCl3)为氧化剂制得的PPy/CS复合导电材料性能更优,比电容达到0.46F/cm2;PPy/CS复合导电材料最佳制备参数为:CS用量1.5g、PPy用量70μL、FeCl3用量25mL、十二烷基苯磺酸钠(SDBS)用量50mL。
Electrode material is the core of capacitive deionization (CDI) technology.In order to improve polypyrrole (PPy) adsorption capacity,electrochemical stability and service life,chitosan (CS) and polypyrrole composite electrode material was prepared.The morphology of PPy/CS composite was analyzed used by scanning electron microscopy (SEM).The structure and composition were characterized using infrared spectroscopy (FT-IR).Electrochemical property of material was characterized by the cyclic voltammetry (CV) and electrochemical impedance spectroscopy.Focuses on that the effect of the amount of antioxidant,CS,PPy and dopants on the materialproperty were studied.The results showed that PPy combined with CS can be to form the conductive polymer composite with good performance.The prepared material performance better than that using FeCl3 as oxidant,which specific capacitance reached 0.46F/cm2.When CS 1.5g,PPy 700μL,FeCl3 25mL,sodium dodecyl benzene sulfonate (SDBS) 50mL,PPy/CS composite had optimal preparation parameters.
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基金资助
国家自然科学基金(51478379,51278407,51408468)
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