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Influence of carbon nanotubes on the optical properties of plasticized solid polymer electrolytes

机译:碳纳米管对增塑固体聚合物电解质光学性能的影响

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Polyethylene oxide (PEO) based solid polymer electrolyte films complexed with lithium hexafluorophos-phate (LiPF_6), ethylene carbonate (EC) and carbon nanotubes (CNTs) are prepared by solution-casting technique. The complexation of doping materials with polymer is confirmed by X-ray diffraction and infrared studies. The incorporation of LiPF_6, EC and CNTs into the host polymer shows a significant increase in conductivity of 10~(-10) and 10~(-3) S cm~(-1). The optical properties such as direct and indirect band gaps are investigated for pure and doped polymer films within a wavelength range of 200-400 nm. It is found that the energy gaps and band edge values shift towards lower energies upon doping. It is shown that LiPF_6, EC and CNTs are responsible for the formation of defects in polymer electrolytes, which increases the degree of disorder in the films.
机译:通过溶液流延技术制备了与六氟磷酸锂(LiPF_6),碳酸亚乙酯(EC)和碳纳米管(CNT)复合的聚环氧乙烷(PEO)基固体聚合物电解质膜。 X射线衍射和红外研究证实了掺杂材料与聚合物的络合。 LiPF_6,EC和CNTs掺入主体聚合物后,电导率显着增加10〜(-10)和10〜(-3)S cm〜(-1)。研究了在200-400 nm波长范围内的纯聚合物膜和掺杂聚合物膜的光学性质,例如直接和间接带隙。发现在掺杂时能隙和能带边缘值朝着较低的能量移动。结果表明,LiPF_6,EC和CNT负责聚合物电解质中缺陷的形成,从而增加了薄膜的无序程度。

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