聚合物基复合固态电解质填料研究进展

聚合物基固态电解质具有优异的稳定性、加工性和低成本,是实现全固态锂电池的理想电解质,然而低离子电导率严重阻碍了其应用。加入无机填料,构筑聚合物基复合固态电解质是提升离子电导率的有效策略。首先,讨论了聚合物电解质的离子传导机理及复合固态电解质组分间的协同作用。其次,从机械强度、电化学稳定窗口、离子电导率、锂离子迁移数四个方面阐述了填料的作用,并以惰性填料、活性填料、功能性填料为分类对近些年填料的研究进展进行了系统介绍,阐释了其物理化学性质对电解质性能的调控机制。最后,在总结现有研究结果的基础上,针对关键问题对未来的研究方向进行了展望。     

固态聚合物电解质

研究了固态聚合物电解质膜中锂离子和增塑剂对其室温电导率的影响，发现加入增塑剂（ＰＣ＋ＥＣ和ＰＥＧ）可提高固态聚合物电解质膜的电导率。通过ＤＳＣ方法测量结果分析了锂离子和增塑剂在固态聚合物电解质膜中的作用机理。     

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。     

室温高电导率固态聚合物电解质薄膜

在一定条件下,用浇注法成功地制备出室温电导率为5×10~(-3)s/cm的固态聚合物薄膜电解质,并进行X射线粉末衍射谱分析,结果表明薄膜是非晶态结构。     

全固态锂电池研究进展

 电动汽车、大规模储能和微型器件等领域的发展要求不断提高现有二次电池的能量密度、功率密度、工作温度范围和安全性。全固态锂电池作为最具潜力的电化学储能装置,近年来受到广泛关注。本文阐述了全固态锂电池的优点,即固态电解质的使用有助于提高锂电池安全性、能量密度和功率密度,拓宽电池工作温度范围和应用领域;指出了作为全固态电池关键材料的固态电解质应满足的要求,并在此基础上分别讨论了聚合物电解质和无机固态电解质（特别是硫化物和氧化物）的优缺点;介绍了固态锂电池的3 种结构类型,即薄膜型、3D 薄膜型和体型,综述了全固态锂电池从薄膜型向体型发展的历史进程及现状,并在此基础上讨论了全固态电池最终实现安全性、高能量密度和功率密度仍需解决的固态电解质材料方面问题。     

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。     

锂电池应用的非水电解质溶液

测定了一系列非水电解质溶液的比电导,并对某些影响因素进行了研究,从而发现了一些适于锂电池应用的非水溶剂和溶质。     

新一代固态纳晶染料敏化太阳能电池电解质研究进展

简要介绍了纳晶染料敏化太阳能电池的结构及工作原理. 根据电解质的形态不同，将其分为液态电解质太阳能电池、准固态电解质太阳能电池和固态电解质太阳能电池. 着重对纳晶染料敏化太阳能电池准固态和固态电解质的研究进展进行了综述，同时总结了作者所在实验室在这方面所做的工作.     

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.     

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。     

Silane as Electrolyte Additives for Lithium Ion Batteries

1 Results In order to overcome the inherent incompatibility of PC with graphite in the lithium ion battery system, improve their electrochemical performance at low temperature,phenyl tris-2-methoxydiethoxy silane (PTMS) has been studied as an additive to the PC-based electrolyte of lithium ion batteries with graphite anode. From the cyclic voltammogram for the graphite anode in the PC-based electrolyte,we find that in the case of the electrolyte without the additive,there is a large irreversible peak ne...     

锂离子电池用无纺布支撑聚合物复合膜的制备

采用γ射线辐射接枝的方法在无纺布纤维表面接枝苯乙烯。将接枝改性后的无纺布浸渍于丁酮/PVDF-HFP/丁醇混合液中,真空干燥后制得多孔的无纺布支撑聚合物电解质复合膜。以其为隔膜组装了聚合物锂离子电池(LiMn2O4/无纺布聚合物复合膜/Li),进行充放电测试。研究结果表明,无纺布聚合物复合膜具有合适的厚度,一定的机械强度。辐射接枝提高了无纺布与聚合物混合液的结合力,在电池的充放电循环过程中不易发生短路,电池的容量和循环性能得到显著提高。     

锂离子电池用无纺布支撑聚合物复合膜的制备

采用γ射线辐射接枝的方法在无纺布纤维表面接枝苯乙烯。将接枝改性后的无纺布浸渍于丁酮/PVDF-HFP/丁醇混合液中,真空干燥后制得多孔的无纺布支撑聚合物电解质复合膜。以其为隔膜组装了聚合物锂离子电池（LiMn₂O₄/无纺布聚合物复合膜/Li）,进行充放电测试。研究结果表明,无纺布聚合物复合膜具有合适的厚度,一定的机械强度。辐射接枝提高了无纺布与聚合物混合液的结合力,在电池的充放电循环过程中不易发生短路,电池的容量和循环性能得到显著提高。     

Quaternary Ammonium Ionic Liquids as a Less Flammable Electrolyte for Lithium Batteries

1 Results Less-flammability is one of the most valuable properties of ionic liquids (ILs) comprised of perfluoroanions such as BF-4,TFSI-([(CF3SO2)2N]-).Recently,such a unique liquid has been expected to use as an electrolyte in order to improve thermal stability and longevity of a lithium secondary battery,which have been increasingly required for an application especially to an electric vehicle and a hybrid car.We previously reported that PI13[TFSI] (PI13: N-methyl-N-propylpiperidinium) could be used ...     

Polymer Electrolytes Based on Electrospun PEO-P(VdF-HFP) Blends for Lithium-Polymer Batteries

1 Results Electrospinning has attracted immense attention recently as a versatile and easy method to prepare polymer membranes that are made up of thin fibers of micron and sub-micron diameters.Such membranes are particularly suitable as host matrices for polymer electrolytes (PEs) since the interlaying of fibers generate large porosity with fully interconnected pore structure facilitating the easy transport of ions.Characterization of PEs based on electrospun membranes of poly(vinylidene fluoride) (PVd...     

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。     

Materials for Lithium Batteries Prepared via Mechanochemical Route

1 Results Nanostructured materials are currently of interest for lithium-ion batteries due to relevant demands for high-rate performance batteries and the aspect of structural stability (reversibility) under charge-discharge processes.Decreasing of particle size facilitates the reducing of diffuse paths for lithium ions as compared with micron-sized materials and the increasing of surface contact between electrode and electrolyte leading to acceleration of ionic transport and of charge-discharge process...     

The Impact of Nanocomposite Materials on Lithium Ion Batteries

1 Results Lithiumion batteries have become the power source of choice for consumer electronic devices such as cell phones and laptop computers due to their high energy density and long cycle life. In addition,lithium-ion batteries are expected to be a major breakthrough in the hybrid vehicle field.Despite their successful commercial application,further performance improvement of the lithium ion battery is still required.Nanomaterials and nanotechnologies can lead to a new generation of lithium secondary...