单离子型全氟凝胶聚合物固体电解质的结构与离子导电性能

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。     

超级电容器电解质的研究进展

综述了超级电容器电解质的研究现状,重点介绍了适用于新型电极材料的水系电解质以及目前已实现商业化的有机电解质,对离子液体电解质、固体和凝胶电解质的产业化提出了展望。     

聚氧乙烯-改性蒙脱石复合材料电性能的研究

用离子交换法对蒙脱石进行有机及无机改性制备了3种改性蒙脱石。采用溶液浇铸法分别对3种改性蒙脱石与聚氧乙烯、LiClO4进行复合制备了聚合物电解质膜。用X射线衍射对改性前后的蒙脱石及部分电解质膜进行了结构表征。采用交流阻抗法对复合型电解质膜的离子电导率进行了测试。结果表明：一定量的改性蒙脱石可以使（PEO）16LiClO4的离子电导率提高几倍到几十倍。改性蒙脱石对基体离子电导率提高程度的不同取决于改性蒙脱石的含量和结构。     

Characterization of PEO-PAN hybrid solid polymer electrolytes

Hybrid solid polymer electrolytes (HSPE) of high ionic conductivity were prepared using polyethylene oxide (PEO), polyacrylonitrile (PAN), propylene carbonate (PrC), ethylene carbonate (EC), and LiClO₄. These electrolyte films were dry, free standing, and dimensionally stable. The HSPE films were characterized by constructing symmetrical cells containing nonblocking lithium electrodes as well as blocking stainless steel electrodes. Studies were made on ionic conductivity, electrochemical reaction, interfacial stability, and morphology of the films using alternating current impedance spectroscopy, infrared spectroscopy, and scanning electron microscopy. The properties of HSPE were compared with the films prepared using (i) PEO, PrC, and LiClO₄; and (ii) PAN, PrC, EC, and LiClO₄. The specific conductivity of the HSPE films was marginally less. Nevertheless, the dimensional stability was much superior. The interfacial stability of lithium was similar in the three electrolyte films. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 2191–2199, 1997     

PVDF-HFP型凝胶聚合物固体电解质的结构与离子导电性能

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。     

锂离子电池用凝胶聚合电解质基体改性的研究进展

介绍了目前用于锂离子电池的凝胶聚合物电解质体系,重点介绍了凝胶聚合物电解质在离子电导率等方面的改性进展。     

高分子固体电解质研究新进展

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。     

聚合物锂离子电池的研究进展

介绍了聚合物电解质的开发过程、分类、导电机理和研究方法以及聚合物电解质存在的问题.综述分析了提高导电聚合物电解质离子电导率的途径,并讨论了今后聚合物电解质的发展方向.     

Quasi-Solid Polymer Electrolyte Composed of poly(1-vinylpyrrolidone-co-vinyl acetate) Copolymer and the Influence of Its Composition on Electrochemical Properties and the Performances of Dye-Sensitized Solar Cells

Poly(1-vinylpyrrolidone-co-vinyl acetate)-based quasi-solid polymer electrolytes doped with potassium iodide are prepared. The highest room temperature ionic conductivity of 1.72 mS?cm^?1 is obtained. The dielectric studies are performed to understand the ion conduction mechanism. Fourier transform infrared study has been performed to understand complexation of the poly(1-vinylpyrrolidone-co-vinyl acetate)-based quasi-solid polymer electrolytes. The best power energy conversion efficiency (η) obtained is 2.94% with short circuit current density (J_sc) of 8.05?mA?cm^?2, open circuit voltage (V_oc) of 0.58?V, and fill factor of 63% under standard light intensity of 100?mW?cm^?2 irradiation.     

光聚合PEO体系高分子固体电解质膜的制备及其性能

引　言由极性聚合物 -碱金属盐络合而成的高分子固体电解质 (ＳＰＥ)是一类很有前途的离子导电材料 ,除具备一般固体电解质的性能外 ,还具有质轻、黏弹性好、易成膜等独特的优点 ,尤其适合作为全固高能密度聚合物电池的电解质材料 ,从而给电源领域引入了电池技术的全新概念 .欲使高分子固体电解质材料实用化 ,必须解决高分子固体电解质薄膜的合成问题 .通常采用的成型方法如溶剂法、热熔法等或者消耗溶剂 ,或者需要基材加热 ,造成高生产成本和低生产效率 ,而且由于有机溶剂的挥发 ,又带来了电池工业环境污染问题[1] .本文针对高氯酸锂 -聚氧…     

Ionic conductivity and physical stability study of gel nework polymer electrolytes

Gel polymer electrolytes (GPE) were prepared by a crosslinking reaction between poly(ethylene glycol) and a crosslinking agent with three isocyanate groups in the presence of propylene carbonate (PC) and ethylene carbonate (EC) or their mixture, and their ionic conducting behavior was carefully investigated. When the plasticizer amount was fixed, the ionic conductivity was greatly influenced by the nature of plasticizers. It was found that the conductivity data followed the Arrhenius equation in the GPE. Whatever plasticizer was used, a maximum ambient conductivity was found at a salt concentration near [Li⁺]/[EO] equal to 0.20. The physical stability of GPE was studied qualitatively by weight loss of GPE under pressure. It was shown that the stability was greatly affected by the network structure of the GPE and the most stable one in our research was the GPE containing the PEO₁₀₀₀ segment, which has a strong interaction between network and plasticizers. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 2957–2962, 2000     

Study of polyurethane/sulfonated dimethyl fumarate complex

In this study linear polyether polyurethanes (PU) and sulfonated dimethyl fumarate (SDMF) were successfully synthesized and a series of novel solid polymer electrolytes, based on the complexes of PU and SDMF, were prepared. Fourier transform–Raman spectroscopy (FT‐Raman), ¹H‐NMR, differential scanning calorimetry (DSC), atomic force microscopy (AFM), and complex impedance analysis were utilized to investigate the chemical structure, microscale morphology, and ionic conductive property of this system. Results show that the ionic conductivity of the PU/SDMF series increases with increasing temperature. In the salt concentration range investigated, there is a maximum ionic conductivity for the PU/SDMF system. When the molar ratio of the ether oxygen and sodium cation is about 24, the optimum compatibility between the hard and soft segments is realized and the highest soft‐segment T_g is reached. A further increase in salt concentration causes the aggregation and precipitation of SDMF, and the decrease of the soft‐segment T_g. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 67–74, 2002; DOI 10.1002/app.10205     

Coordination Polymeric Chain Assemblies of Some Metal Ions with BHQPP

A few coordination chain polymeric assemblies of the type [M(H₂L)(H₂O)₂]_n·xH₂O [where M = Mn(II), Cu(II) and Zn(II) x = 1; Co(II) and Ni(II) x = 2, H₂L = 2,2′-bis-4-[(8-hydroxy-5-quinoline methylenoxy) phenyl] propane] (BHQPP) have been investigated. Structural and spectroscopic properties have been determined by elemental analyses, infrared spectra, electronic spectra, magnetic measurements and thermo-gravimetric analyses. Magnetic moment and reflectance spectral studies reveal that an octahedral geometry is present in all the prepared coordination polymers. The kinetic parameters such as order of reaction (n) and the energy of activation (Ea) were determined using the Freeman–Carroll method. The pre-exponential factor (A), the activation entropy (ΔS^#), the activation enthalpy (ΔH^#) and the free energy of activation (ΔG^#) have been calculated.