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首页> 外文期刊>Journal of power sources >Physico- and electrochemistry of composite electrolytes based on PEODME-LiTFSI with TiO_2
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Physico- and electrochemistry of composite electrolytes based on PEODME-LiTFSI with TiO_2

机译:基于TiO_2的PEODME-LiTFSI复合电解质的物理和电化学。

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摘要

The effect of fumed TiO_2 fillers (pure and modified by H_2SO_4) on ionic conductivity of composite electrolytes based on poly(ethylene oxide) dimethyl ether (PEODME) oligomer (M_w = 500) doped with lithium bis-(trifluoromethanesulfonyl)imide LiN(CF_3SO_2)_2 (LiTFSI) are studied by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FT-IR) and complex impedance methods. The electrochemical stability of the electrolytes in the potential range of 4 V versus Li electrode has been confirmed by voltammetric measurements. Li electrode reactions have been followed by means of impedance spectroscopy. The growth in time of the resistance of the interfacial (Li electrode-polymer electrolyte) layers was inhibited upon the addition of fillers.
机译:气相TiO_2填料(纯净并经H_2SO_4改性)对掺有双(三氟甲磺酰基)酰亚胺锂LiN(CF_3SO_2)的聚环氧乙烷二甲醚(PEODME)低聚物(M_w = 500)的复合电解质的离子电导率的影响_2(LiTFSI)通过差示扫描量热法(DSC),傅立叶变换红外光谱(FT-IR)和复阻抗方法进行了研究。相对于Li电极,电解液在4 V电位范围内的电化学稳定性已通过伏安法测量得到证实。锂电极反应已通过阻抗光谱法进行了跟踪。在添加填料时,界面(Li电极-聚合物电解质)层的电阻随时间的增长受到抑制。

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