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高分子固体电解质研究新进展 总被引:2,自引:0,他引:2
王景儒 《化学推进剂与高分子材料》2004,2(3):18-23
高分子固体电解质(SPE)是一类全新的电解质,具有质轻、易成膜、黏弹性好和稳定性好等许多无机电解质和有机溶剂电解质不可比拟的性能,近年来研究进展很快。介绍高分子固体电解质类型及其性能提高的途径。 相似文献
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从Nafion树脂出发,制备了一系列单离子型全氟凝胶聚合物固体电解质膜,其中有机极性介质为碳酸丙烯酯(PC)。通过溶胀曲线测定、红外光谱分析、复阻抗分析等手段对材料的结构与离子导电性能进行了研究。结果表明,PC与阳离子之间存在较强的相互作用,而且PC与Li+离子之间的相互作用强于PC与H+离子之间的相互作用。PC含量对材料的离子导电性能也有较大的影响。随着PC含量的增加,材料的离子电导率呈上升趋势。当PC含量较低时,Li+型样品的室温离子电导率高于H+型样品;而PC含量较高时,Li+型样品的室温离子电导率则低于H+型样品。Li+型样品和H+型样品的室温离子电导率均可达到1.25×10-4S·cm-1。 相似文献
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Y. Ikeda H. Masui S. Syoji T. Sakashita Y. Matoba S. Kohjiya 《Polymer International》1997,43(3):269-273
Novel high molecular weight comb-shaped polyethers were synthesized and used as the matrix of a polymer solid electrolyte. Both the main chain and the side chain of these polyethers consist of oxyethylene units. The new polyethers possess film-forming properties, because the weight-average molecular weights were over 106. The short side chains of oxyethylene units gave rise to less crystallization of poly(oxyethylene) segments and to an increase of ionic conductivity when doped with lithium perchlorate. © 1997 SCI. 相似文献
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以PEO为基质,复配少量纳米无机填料及低分子乙氧化物,制备出了新型的固态纳米复合聚合物电解质膜,利用交流阻抗法测试了聚合物电解质的离子电导率,对离子导电性能进行了研究。采用CPE元件的模拟电路具有很好的适用性。结果表明当低分子乙氧化物的加入量超过80%时电解质膜的电导率大幅提高,并且PEGDME优于PEG300。电导率在LiPF6加量在O:Li为8:1时达到最大,随着LiClO4加量的增加持续增加,随无机盐加量增加电解质膜的成膜性能变差。用多微孔高比表面的纳米SiO2粒子复合有利于改善聚合物的电导率。聚合物电解质离子电导率对温度的依赖关系符合Arrhenius方程。 相似文献
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This study evaluated the memristive switching characteristics of a biomaterial solid polymer electrolyte (SPE) chitosan-based memristor and confirmed its artificial synaptic behavior with analog switching. Despite the potential advantages of organic memristors for high-end electronics, the unstable multilevel states and poor reliability of organic devices must be overcome. The fabricated Ti/SPE-chitosan/Pt-structured memristor has stable bipolar resistive switching (BRS) behavior due to a cation-based electrochemical reaction between a polymeric electrolyte and metal ions and exhibits excellent endurance in 5 × 102 DC cycles. In addition, we achieved multilevel per cell (MLC) BRS I-V characteristics by adjusting the set compliance current (Icc) for analog switching. The multilevel states demonstrated uniform resistance distributions and nonvolatile retention characteristics over 104 s. These stable MLC properties are explained by the laterally intensified conductive filaments in SPE-chitosan, based on the linear relationship between operating voltage margin (ΔVswitching) and Icc. In addition, the multilevel resistance dependence on Icc suggests the capability of continuous analog resistance switching. Chitosan-based SPE artificial synapses ensure the emulation of short- and long-term plasticity of biological synapses, including excitatory postsynaptic current, inhibitory postsynaptic current, paired-pulse facilitation, and paired-pulse depression. Furthermore, the gradual conductance modulations upon repeated stimulation by 104 electric pulses were evaluated in high stability. 相似文献
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以PVDF-HFP为基体聚合物,制备了一系列凝胶聚合物固体电解质膜,其中有机极性介质为碳酸丙烯酯(PC),电解质盐为LiClO4。通过红外光谱分析、差示扫描量热分析、复阻抗分析等手段对凝胶聚合物固体电解质的结构与离子导电性能进行了研究。结果表明,PC与阳离子之间存在较强的络合作用,PC对基体聚合物有很强的增塑作用。锂盐和PC含量对材料的离子导电性能有较大的影响。随着锂盐和PC含量的增加,材料的离子电导率呈上升趋势。 相似文献
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An all‐solid actuator, consisting of a polyaniline (PANI) film and a solid polymer electrolyte (SPE) of poly(ethylene oxide) derivative (STO288), clearly showed a reversible displacement in an atmosphere when a voltage was applied between the PANI film and the SPE layer. The displacement and the response rate are mainly dependent on the applied voltage and the employed supporting salt, but are influenced by the humidity and temperature of the environment. The results of the present experiments have revealed that the influences of the humidity and temperature on the performance of the actuator are predominantly through the ionic conductivity of the SPE.
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聚合物电解质的离子电导率是电解质的一个重要参数 ,与聚合物电解质中的非晶态的存在有很大的关系。在本文中 ,以X射线衍射 (XRD)、差热分析 (DTA)和交流阻抗 (Acimpedance)为研究手段 ,研究了快冷对聚合物电解质的晶型转变和对聚合物电解质室温离子电导率的影响。在快速冷却的条件下 ,质量比为1∶1的PEO/LiClO4聚合物电解质的室温离子电导率可达 1 6 1x 10 -7S/cm ,比慢冷处理的相同体系的室温离子电导率提高了 1个数量级。实验证明 ,快速冷却可破坏聚合物的结晶性 ,提高聚合物电解质的离子电导率。 相似文献
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利用溶液聚合方法合成了聚醚聚氨酯,并以聚氨酯、高氯酸锂和增塑剂为组分,制备了一系列新型聚合物固体电解质。运用差示扫描量热分析、动态力学分析、交流复阻抗谱、扫描电镜和原子力显微镜对体系性能和形态进行了研究。结果表明,在聚氨酯/高氯酸锂复合物中,增塑剂的加人会导致体系玻璃化转变温度和力学性能有所下降,离子导电性能显著增加。在所研究的6种增塑剂碳酸丙烯酯、碳酸二乙酯、二乙二醇二甲醚、N,N-二甲基甲酰胺、聚乙二醇400和丙三醇中,聚乙二醇400对聚氨酯/高氯酸锂复合物的增塑效果最好,该体系室温电导率达到10-4S/cm。 相似文献