P(AN-MMA)基锂离子电池凝胶聚合物电解质研究进展

综述了用于锂离子电池的以聚丙烯腈-甲基丙烯酸甲酯P(AN-MMA)共聚物为基体的凝胶聚合物电解质的研究现状和进展,讨论了P(AN-MMA)基电解质的主要问题和解决这些问题的可能措施.     

聚合物锂离子二次电池

聚合物锂离子二次电池是一种新型锂离子电池，既具有锂离子电池的优点又具有易于薄型化和改变形状的特点，符合便携式电器小型化趋势的要求，已成为电池研究开发的又一热点，本从贝尔塑料锂离子电池出发，着重综述了凝胶电解质锂离子电池应用研究现状。     

锂离子电池用 ＰＭＭＡ 基凝胶聚合物电解质制备的实验教学研究

对锂离子电池用聚甲基丙烯酸甲酯（ＰＭＭＡ）基凝胶聚合物电解质制备实验教学方法进行了研究． 阐述了锂离子电池实验原理与实验方法,总结了实验特点和教学特点,探索了通过凝胶聚合物电解质制备的实验教学培养和提高学生的动手能力、激发学生科学研究兴趣的方法． 通过该实验的实施,有助于激发学生形成发现问题及解决问题的能力,培养学生的创新能力,可取得良好的教学效果．     

锂电池复合型聚合物电解质材料研究进展

综述了近年来国内外在锂离子电池复合型固态聚合物电解质和复合型凝胶聚合物电解质材料的研究进展。     

聚合物锂离子电池负极电化学性能研究

制备了聚合物锂离子电池用负极 ,对其首次充放电效率、比容量、不同放电倍率下放电性能进行了测试 .首次充放电容量分别为 340 m A· h·g- 1和 310 m A·h· g- l,库仑效率可达 91% .以锂锰氧为正极组装了聚合物锂离子电池 ,通过测试表明制备的聚合物锂离子电池具有较好的循环性和大电流放电能力 .所制负极可应用于聚合物锂离子电池中 .     

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.     

锂离子电池用阻燃聚合物电解质的合成及表征

通过二氯甲基膦、聚乙二醇以及环己二醇的聚合反应得到甲基膦酸乙二醇-环己二醇共聚物(MPEH)。采用FTIR、~1H-NMR和~(31)P-NMR对产物进行了表征。以聚乙烯(PE)为基体成膜后,20 wt%MPEH-PE复合膜的极限氧指数(LOI)由纯PE膜的18.6%提高至26.4%,且燃烧产物成碳明显。     

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.     

凝胶型聚合物电解质电化学性质的研究

研究了以ＰＶＣ和ＰＭＭＡ为基的锂盐复合物凝胶电解质的电化学性质,结果表明,这些电解质具有高的离子电导率和宽的电化学稳定区,但用于二次锂电池时,会因锂电极界面被逐渐腐蚀而影响电池寿命。     

Study on the Ion Association in PVdF-based Gel Polymer Electrolyte

IntroductionGel polymer electrolytes were originally described byFeuillade and Perche[1]and further characterized byAbraham and Alamgir[2 ,3], and formed by trapping liquidorganic solutions in a polymer matrix. Compared with solidpolymer electrolytes , gel polymer electrolytes can contactwith electrode tightly and have a room temperatureconductivity of above 10-3S·cm-1,so they are of practicalinterest for the development of new-design,advancedlithiumbatteries . A variety of polymers as poly…     

固态锂电池聚合物电解质研究进展

聚合物作为一种固态电解质具有优良的力学和机械性能,它的性质很大程度上决定了固态锂电池的电化学性能。对部分近期比较热门的聚合物电解质的研究进展进行简要总结,将不同聚合物电解质的性能和优缺点进行比较和讨论,并且对聚合物电解质的研究发展进行展望。     

碱处理改性PVDF-HFP聚合物电解质膜

通过碱液处理对聚偏氟乙烯-六氟丙烯(PVDF-HFP)聚合物电解质进行改性,并利用IR、XRD、SEM等表征了改性后聚合物电解质的组成和结构。SEM照片显示改性后的聚合物电解质膜呈海绵多孔状,有利于锂离子的传导。线形伏安扫描测得该聚合物电解质在6 V以内具有很好的电化学稳定性;交流阻抗方法测得20℃时改性后聚合物电解质的离子电导率为1.272×1-0 3S/cm。此改性方法简单,成本较低,且对环境无害。     

Gelation Behavior of Poly （Vinylidene Fluoride ）-based Gel Polymer Electrolyte

Poly （ vinylidene fluoride ） （ PVdF ）-based gel polymer electrolytes with various compositions were prepared by solution casting technique, The kinetics of gelation was analyzed via the correlation between the apparent gelation rate and concentration of PVdF at a given temperature, Combination the results of the kinetics of gelation and the DSC study, it revealed that the phase separation was the major behavior and the fibrils were the major junction joints of the three-dimensional network even in the case the concentration of PVdF was higher than 25 wt%. The porous surface observed by ESEM also reflected that the phase separation took place during the gelation.     

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...     

PMMA-based Gel Polymer Electrolytes with Crosslinking Network

The lithium-ion battery has a good rate capability and low-temperature performance, but its safety is relatively low due to the possibility of leakage of liquid electrolyte. The use of a solid or gel type electrolyte can lower the probability of leakage liquid electrolyte, and the electrochemical performance of gel electrolyte doesn＇t decrease so markedly as the solid electrolyte. Now, new types of advanced lithium-ion battery with gel polymer electrolytes are under developing which can be used in the future.     

Hyperbranched Polymer-Based Electrolyte for Lithium Polymer Batteries

Solid polymer electrolytes have attracted much attention as electrolyte materials for all solid-state rechargeable lithium batteries, and poly （ethylene oxide） （PEO）-based polymer electrolytes axe among the most intensively studied systems Hyperbranched polymers have unique properties such as completely amorphous, highly soluble in common organic solvent and processible because of the highly branched nature.     

凝胶电解质LiClO4—PC—PMMA体系的离子导电性研究

研究了一种新型高子固态离子导体－凝胶电解质高氯酸锂－碳酸丙烯酯－聚甲基丙烯酸甲酯体系（ＬｉＣｌＯ４－ＰＣ－ＰＭＭＡ）离子电导性和电导机理，这类离子导体的电导率与温度的关系服从ＶＴＦ方程并与体系的ｗ（ＰＭＭＡ），玻璃化温度（Ｔｇ）碱金属盐的浓度（ｃ（ＬｉＣｌＯ４）等有关，当ｃ（ＬｉＣｌＯ４）＝０．５ｍｏｌ／Ｌ，ｗ（ＰＭＭＡ）＝３５％时，离子导体具有良好的粘附性，光学透明度及较高的室温离子电导率（δＲ