一种新型聚氧化乙烯基凝胶型聚合物电解质的制备及其性能

通过紫外固化的方法合成了一种新型的聚氧化乙烯(PEO)基凝胶型聚合物膜,该聚合物膜具有适当的交联密度、良好的空间结构稳定性以及吸附液体电解液的性能.利用所合成的凝胶型聚合物膜制备了凝胶型聚合物电解质.研究表明,该聚合物电解质膜具有较高的离子电导率,其室温离子电导率最高可达1 mS/cm左右;较宽的电化学稳定窗口和较好的热稳定性能,可达到锂离子二次电池的使用要求.     

电致变色器件用聚合物凝胶电解质研究进展

电解质是电致变色器件的重要组成部分,为变色反应提供所必需的补偿离子,其性能直接影响器件的响应速率、光学对比度和使用寿命.聚合物凝艘电解质易加工封装且具有较高的离子电导率,因而被广泛用于电致变色器件中.综述了电致变色器件用聚合物凝胶电解质的研究进展,着重介绍了新型离子凝胶和聚离子凝胶电解质在电致变色器件中的应用、存在的问题及发展建议.     

细菌纤维素凝胶聚合物电解质的制备与性能

利用溶剂转换法制备新型锂离子电池凝胶聚合物电解质(GPE).通过扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)、热重(TG)分析、广角X射线衍射(WXRD)、力学拉伸及交流阻抗等测试,分析了细菌纤维素凝胶聚合物电解质的微观形态、结构以及电化学性能.研究结果表明:室温下细菌纤维素凝胶聚合物电解质的离子电导率高达1.6×10-2S/cm,拉伸强度达到39.8MPa,其在锂离子电池开发中具有良好的应用前景.     

电致变色器件用聚合物凝胶电解质研究进展

电解质是电致变色器件的重要组成部分,为变色反应提供所必需的补偿离子,其性能直接影响器件的响应速率、光学对比度和使用寿命.聚合物凝艘电解质易加工封装且具有较高的离子电导率,因而被广泛用于电致变色器件中.综述了电致变色器件用聚合物凝胶电解质的研究进展,着重介绍了新型离子凝胶和聚离子凝胶电解质在电致变色器件中的应用、存在的问题及发展建议.     

聚氨酯固体电解质的聚合物—离子相互作用及其导电作用

制备了一种结构类似于聚氨酯硬段的模型化合物,并以该模型化合物与聚氨酯和高氨酸钠盐复合,制备了一系列的聚氨酯型聚合物固体电解质,通过红外光谱和复阻抗谱分析方法对该体系的离子聚集形态、离子-聚合物相互作用进行了初步的探索,并对其离子导电性能进行了研究,结果表明,随着钠离子浓度的增加,钠离子优先与醚氧基发生络合,当其浓度达到较高水平后,转而主要与羰基发生络合;体系中盐浓度升高,自由离子和离子聚集体数目均有增加,该体系存在最佳盐程度,此时具有很高的离子导电性能,但电导率与温度关系不符合Arrhenius方程,硬段模型化合物的加入不利于体系的离子导电性能。     

聚合物锂离子电池凝胶电解质的研究进展

凝胶聚合物电解质(GPE)因具有良好的力学加工性能、安全性能和较高的室温离子电导率而受到广泛关注。针对国内外通过修饰聚合物基体、优化有机增塑剂、改善锂盐、改善复合离子液体、加入无机粒子的方式对GPE的改性研究进行了相关总结与分析。     

PAN基凝胶聚合物电解质超级电容器的研究

制备了PAN基凝胶聚合物电解质及PAN基凝胶聚合物超级电容器.采用交流阻抗法测量了凝胶聚合物电解质的离子电导率.采用交流阻抗、循环伏安、恒流充放电等测试方法研究了凝胶聚合物电解质超级电容器的性能,并对交流阻抗谱进行了模拟分析.结果表明,PAN基凝胶聚合物电解质的电导率在室温下可达7.54m s.cm-1,以活性炭为电极材料,内聚合的方式制备的PAN基凝胶聚合物电解质电容器的工作电压可达2.5V,内阻为8.92-12.6Ω.cm2,比容量达20.6 F/g(i=0.5 mA/cm2).     

CuO-海泡石/PMMA-PEG复合凝胶聚合物电解质的制备与性能

通过沉淀法合成了CuO-海泡石,再经溶液浇注法得到不同含量CuO-海泡石掺杂的PMMA-PEG基复合凝胶电解质膜。采用扫描电镜观察、X射线衍射分析、红外光谱、热重和电化学阻抗手段对复合凝胶电解质膜的结构和电化学性能进行了测试。结果表明,复合聚合物膜表面呈多孔状,且CuO-海泡石在复合聚合物膜中实现了良好分散。随着CuO-海泡石含量增加,复合凝胶电解质膜的电导率增高,热稳定性也明显提高。     

PVA-PAA-KOH碱性凝胶聚合物电解质薄膜的研究

由聚乙烯醇(PVA)和聚丙烯酸(PAA)成功制备了PVA-PAA-KOH碱性凝胶聚合物电解质薄膜.XRD结果表明,PAA和KOH的加入,有效降低了PVA的结晶程度,并使得该薄膜处于无定形态.交流阻抗结果表明,该薄膜的电导率随着PVA含量的增加而减小.当薄膜组成为PVA:AA:KOH=10:50:40(质量比)时,其室温电导率最大,为2.4×10-2S/cm.循环伏安(CV)和激光拉曼光谱结果表明,该电解质膜具有较好的电化学稳定性.以此薄膜为电解质组装聚合物镍氢二次电池,结果表明,与碱性水溶液为电解液的电池相比,该聚合物电池具有较优的循环寿命,低倍率放电性能良好.     

凝胶聚合物电解质MnO2/AC电容器的研究

采用液相氧化法制备了MnO2超级电容器电极材料,以MnO2为正极材料,活性炭(AC)为负极材料,丙烯腈作聚合物单体,碳酸二甲酯(DMC)与碳酸乙烯酯(EC)的混和液作增塑剂,高氯酸锂为支持电解质,采用内聚合法制备PAN基凝胶聚合物电解质MnO2/AC混合电容器.通过循环伏安、交流阻抗、恒流充放电等测试方法对混合电容器的电化学性能进行了测试.结果表明:混合电容器的工作电压为2.5 V,比容量为27.3 F/g(i=0.5 mA/cm2),比同电解质体系的AC/AC电容器提高约48.21%.     

Polymer Electrolytes Based on Ionic Liquids

1 Results Classical solutions of electrolytes are obtained by dissolution of salts in molecular solvents. Such systems consist of solvated ions, their charged or neutral combinations and solvent molecules. On the other hand, a salt may be melted down, or in other words ‘liquified’, by providing to the system a heat to counterbalance the salt lattice energy. Such a system, called molten salts or ionic liquid (IL), consists of ions and their combinations and is free of any molecular solvent. Relatively hi...     

Novel All Solid-state Polymer Electrolytes for Lithium Battery

All solid-state polymer electrolytes for lithium battery was proved to be an attractive direction. Compared with prevenient polymer electrolytes all solid-state polymer electrolytes were superiority in more broad electrochemical window, more stable/low interracial resistance especially when situ-polymerization utilized, excellent mechanical properties and dissepiment free. A lithium secondary battery using all solid-state polymer electrolyte meet the challenge of energy source for both portable electronic devices and electric vehicles （EV） or engine/battery hybrid vehicles （HEV）. All solid-state comb-like network polymer electrolytes （CNPE） based on polysiloxane with internal plasticizing chain （IPC） has been designed and synthesized. See Fig. 1.     

Novel Amphiphilic Polymer Gel Electrolytes Based on PEG-b-GMA-co-MMA

1 Results Gel polymer electrolytes for lithium battery have been widely investigated recently because of their high ion conductivity at room temperature. We synthesized and characterized novel gel electrolytes based on amphiphilic copolymethacrylates containing different lengths of ethylene oxide (EO) chain as ionophilic units and methyl methacrylate (MMA) chain as ionophobic units[1]. Their electrochemical properties were also measured.1H NMR and FTIR analysis results elucidated that PEG-b-glycidyl met...     

Electrochemical Study of Conductive Gel Polymer

Conventional ion-conducting polymer consists of electrolyte salt and polymer matrix, so-called salt-inpolymer. It possesses lower conductivity because the migration of ions depends on the motion of polymer segmental. To increase the ionic conductivity, a kind of gel polymer film （GPF） was prepared by in situ polymerization of methyl methacrylate （MMA） monomer in room-temperature ionic liquid （RTIL）, 1-butyl-3- methylimidazolium hexafluorophosphate （BMIPF6）. Due to immeasurably low vapor pressure, high ionic conductivity, and greater thermal and electrochemical stability, BMIPF6 is suitable electrolyte salts for ion-conducting polymer.     

Advanced Polymer Electrolytes for Highenergy-density Power Sources

The preparation of highly controlled thin films of lithium ion conducting organic materials is becoming a challenging but rewarding goal in view of obtaining high-performance technological devices like solid-state polymer batteries and capacitors. The classical polymer electrolyte consists of organic macromolecules （usually polyether polymer） that are doped with inorganic （typically lithium） salts. Poly（ethylene oxide） （PEO） is the most commonly employed polymer in PEs because of the peculiar array in the, （-CH2-CH2-O-）n chain providing the ability to solvate low-lattice-energy lithium salts.     

新型核-多臂星形聚合物电解质

采用傅里叶转换红外光谱法(FT-IR)、微分扫描量热分析(DSC)、离子阻抗谱等测试手段对以超支化聚缩水甘油(HPG)为核，线型聚氨酯(PEU)为臂的核-多臂星形聚合物进行了表征，对其分子结构与电导性能之间的关系进行了初步探索．结果表明，星形聚合物比线型聚合物有更强的溶盐能力和离子传输能力．氧锂比(氧化乙烯单元与锂离子的摩尔比)为4，共混比(质量)为30％时，体系的最高电导率可达0．2mS／cm．当星形聚合物的臂数为5时，体系的电导率高于相同条件下的其他臂数的聚合物体系．体系的电导率随温度的升高而升高，其变化规律符合Arrhcnius方程．     

Proton Conducting Polymer Electrolytes and Its Applications

1 Introduction Proton conducting solid polymer electrolytes have been extensively studied due to their potential applications in electrochemical devices such as batteries, super capacitors, electrochromic windows, sensors etc~([1,2]). Many researchers have studied the behaviour of inorganic based polymer electrolytes as proton conductors and their applications in solid state devices at room temperature~([3]). But, inorganic acid doped electrolytes have some serious disadvantages like corrosion…     

Solid Polymer Electrolytes Based on Cross-linkable Oligo (oxyethylene)-Branched Oligo (organophosphazenes)

1Introduction Solid polymer electrolytes have attracted considerable interest because of their potential application in secondary high energy density lithium batteries. The poly(ethylene oxide)(PEO) has been widely studied as the classical polymer matrix for solid polymer electrolytes. However, the poor room temperature conductivity due to its crystalline is the principal problem to be overcomed. This has prompted many researchers to attempt to modify the properties of PEO.