P（VDF—HFP）基凝胶聚合物电解质的研究进展

概述影响凝胶聚合物电解质性能的的因素;重点介绍P(VDF-HFP)多孔凝胶聚合物电解质作为锂离子电池聚合物电解质的研究进展,包括该类聚合物电解质的的制备方法及其离子电导率;展望了凝胶聚合物电解质在锂离子电池中的应用前景.     

提高凝胶电解质电导率的最新研究进展

综述了一种新型功能高分子材料——凝胶电解质近几年来的研究进展.说明了凝胶电解质的类型:固态聚合物电解质、凝胶聚合物电解质、复合凝胶聚合物电解质.重点阐述了提高凝胶电解质导电性能的方法.主要包括:采用电导率高和化学稳定性高的锂盐,采用交联、共聚和共混等方法对分子结构进行改性,降低结晶性能,添加增塑剂,添加无机填料等.并预...     

染料敏化太阳能电池中凝胶电解质的研究进展

简单介绍了凝胶电解质的概念、分类以及凝胶电解质染料敏化太阳能电池制作过程,着重对有机小分子凝胶电解质、聚合物凝胶电解质和无机纳米粒子凝胶电解质3种不同凝胶电解质研究进展进行了综述.     

凝胶聚合物电解质的研究进展

介绍了几种聚合物高分子材料,常以其作为凝胶聚合物电解质基体。如聚氧化乙烯(PEO)、聚丙烯腈(PAN)、聚甲基丙烯酸甲酯(PMMA)、聚偏氟乙烯(PVDF)。对于凝胶聚合物电解质的研究,目前仍处于初级阶段,还存在许多问题。本文探讨了凝胶聚合物电解质的改性方法,主要有交联、共聚、共混或添加填料等,并展望了凝胶聚合物电解质的应用前景。     

用于锂离子电池的改性凝胶聚合物电解质

综述了凝胶聚合物电解质的性能影响因素和改性方法;着重介绍了无机纳米粒子掺杂改性;论述了近年来离子液体在聚合物电解质方面的应用;展望了凝胶聚合物电解质的发展及应用前景。     

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。     

锂离子电池PVDF基凝胶电解质隔膜的研究进展

综述了近年来聚合物锂离子电池PVDF基凝胶电解质隔膜的研究进展,详细介绍了凝胶聚合物电解质隔膜的结构性能、在聚合物锂离子电池中的作用以及PVDF基电解质隔膜的制备方法和改性技术,并指出了聚合物锂离子电池隔膜的发展趋势和研究方向。     

累托石的有机改性及其对凝胶聚合物电解质的影响

用十二烷基二甲基苄基氯化铵改性天然黏土累托石,得到有机改性累托石(organic modified rectorite,OREC),再用OREC改性凝胶聚合物电解质.对OREC进行红外、X射线衍射、偏光显微分析,并对OREC改性的凝胶聚合物电解质体系的X射线衍射结果、离子电导率及热性能进行了分析.结果表明:OREC能作为改性剂用在凝胶聚合物电解质中,在凝胶电解质中达到完全解离,能提高电解质的离子电导率,且改性电解质的玻璃化转变温度随OREC添加量的增加而增大,热稳定性提高.     

锂离子电池聚合物电解质的研究进展

对固体聚合物电解质和凝胶聚合物电解质的发展、组成、性能及其在聚合物锂离子电池中的应用等方面进行了总结和评述,比较了其优缺点和应用范围,对聚合物电解质及聚合物锂离子蓄电池的发展前景进行了预测。     

改性累托石对凝胶电解质组分相互作用的影响

用十二烷基二甲基苄基氯化铵改性天然黏土累托石,得到有机改性累托石(organic modified rectorite,OREC),再用OREC改性液体和凝胶电解质.通过研究电导率及粘度变化以及红外分析,考察制备凝胶聚合物电解质的有机溶剂碳酸丙烯酯(propylene carbonate,PC)、高氯酸锂和OREC间存在的相互作用.结果表明:PC与OREC表面Si OH存在强烈氢键作用,大幅度提高了凝胶聚合物电解质的粘度,添加一定量的OREC,可提高复合凝胶聚合物电解质的离子电导率.     

凝胶聚合物电解质的电化学性能

用化学交联法制备了凝胶聚合物电解质.聚烯烃多孔膜支撑的凝胶聚合物电解质具有优良的电化学性能, 室温电导率为1.01×10^-3S•cm^-1,锂离子迁移数为0.41,在Al电极上的氧化起始电位达到4.2 V以上.采用聚烯烃多孔膜支撑的凝胶聚合物电解质制备了聚合物锂离子电池,并研究了工艺条件对聚合物锂离子电池电化学性能的影响.研究的工艺条件包括：单体添加量和电极组合方式.优化后的聚合物锂离子电池具有良好的电化学性能,1 C放电容量为0.2 C放电容量的93.2%,经100次1 C循环后的剩余容量仍在80%以上.     

In situ composite of nano SiO2-P(VDF-HFP) porous polymer electrolytes for Li-ion batteries

Nano SiO₂-P(VDF-HFP) composite porous membranes were prepared as the matrix of porous polymer electrolytes through in situ composite method based on hydrolysis of tetraethoxysilane and phase inversion. SEM, TEM, DSC and AC impedance analysis were carried out. It is found that the in situ prepared nano silica was homogeneously dispersed in the polymeric matrix, enhanced conductivity and electrochemical stability of porous polymer electrolytes, and improved the stability of the electrolytes against lithium metal electrodes. The in situ composite method was found to be much better than the direct composite method in lowering the interfacial resistance between electrolyte and lithium metal electrode. Moreover, cycle test of lithium batteries using lithium metal as anode and sulfur composite material as cathode showed that the electrolyte based on in situ composite of silica presented stable charge-discharge behavior and little capacity loss of battery.     

增塑型锂离子电池聚合物电解质

从组成聚合物电解质的聚合物基材和电解液两方面进行分析,介绍了最近几年凝胶型、微孔型和复合型聚合物电解质的研究现状,比较了它们的制备方法、性能和特点,探讨了锂盐、增塑剂、离子液体和单离子导体等对聚合物电解质性能的影响,并简要评述了聚合物锂离子电池未来发展的前景趋势。     

Bifunctional poly(ethylene glycol) based crosslinked network polymers as electrolytes for all‐solid‐state lithium ion batteries

Polymer electrolyte based lithium ion batteries represent a revolution in the battery community due to their intrinsic enhanced safety, and as a result polymer electrolytes have been proposed as a replacement for conventional liquid electrolytes. Herein, the preparation of a family of crosslinked network polymers as electrolytes via the ‘click‐chemistry’ technique involving thiol‐ene or thiol‐epoxy is reported. These network polymer electrolytes comprise bifunctional poly(ethylene glycol) as the lithium ion solvating polymer, pentaerythritol tetrakis (3‐mercaptopropionate) as the crosslinker and lithium bis(trifluoromethane)sulfonimide as the lithium salt. The crosslinked network polymer electrolytes obtained show low T_g, high ionic conductivity and a good lithium ion transference number (ca 0.56). In addition, the membrane demonstrated sterling mechanical robustness and high thermal stability. The advantages of the network polymer electrolytes in this study are their harmonious characteristics as solid electrolytes and the potential adaptability to improve performance by combining with inorganic fillers, ionic liquids or other materials. In addition, the simple formation of the network structures without high temperatures or light irradiation has enabled the practical large‐area fabrication and in situ fabrication on cathode electrodes. As a preliminary study, the prepared crosslinked network polymer materials were used as solid electrolytes in the elaboration of all‐solid‐state lithium metal battery prototypes with moderate charge–discharge profiles at different current densities leaving a good platform for further improvement. © 2018 Society of Chemical Industry     

An all solid-state polymer—polymer electrolyte—lithium rechargeable battery for room temperature applications

A new polymer electrolyte based on polyethylene oxide (PEO) and styrenic macromonomer of PEO—lithium perchlorate complexes, conceived for room-temperature battery applications, has been tested in a lithium polybithiophene rechargeable battery. Cyclability and stability data are reported and discussed.     

Ionic conductivity and interfacial properties of polymer electrolytes based on PEO and boroxine ring polymer

Blended polymer electrolytes based on poly(ethylene oxide) (PEO) and boroxine ring polymer (BP) solvated with lithium triflate were formulated and evaluated. Compared to PEO–salt polymer electrolyte, ionic conductivities of blended polymer electrolytes were two orders of magnitude higher in a low‐temperature range; as well, lithium transference numbers were increased to ～ 0.4. These were due to the increased mobility and anion trapping of boroxine rings. BP also exhibited the stabilizing effect on lithium–polymer electrolyte interface, and a reduced interfacial resistance between lithium metal and the polymer electrolyte was found with increasing of BP content. Polymer electrolytes based on PEO and BP are suitable for use in lithium secondary battery. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 17–21, 2002; DOI 10.1002/app.10090     

锂离子二次电池负极材料的研究

综述了最近几年来锂离子二次电池负极材料的研究。研究的负极材料主要有：改性碳材料、氮化物、硅化物、氧化物和新型合金。通过引入金属和非金属元素,碳材料的可逆容量、循环性能有了一定提高,这主要是碳材料的电子状态、石墨结构和表面有明显的改善。氮化物、硅化物、氧化物和合金等负极材料虽然在某些性能方面强于碳材料,但是从实用的角度而言,还存在着一些不如意的地方。随着固体电解质的不断研究,锂金属及其合金有可能成为最有前景的负极材料。另外,对于锂在部分主体材料中的储存机理予以说明,在这方面的研究有待于进一步的探讨     

Performance of acrylate-poly(ethylene oxide) polymer electrolytes in lithium batteries

Results for the performance of lithium/Mn0₂ batteries containing solid polymer electrolytes based on poly(ethylene oxide) blends with some acrylic derivatives are presented. The ionic conductivities of the electrolytes are promising for battery application. It was found, however, that interfacial phenomena impair the battery efficiency. Impedance spectroscopy shows resistive limitations at the anode interface of the batteries, caused either by formation of an electrically distinguishable resistive layer or by chemical interaction between the polymer and lithium, influencing, most probably, the kinetics of the lithium oxidation reaction.     

锂电池用PEO基固态聚合物电解质研究进展及应用

介绍了锂电池用聚氧化乙烯(PEO)基固态聚合物电解质的研究进展,论述了国内外在PEO改性、锂盐改进和制备PEO-无机复合聚合物电解质等三方面在提高其电导率、电化学稳定窗口和离子迁移数等性能进行的研究,综述了PEO基聚合物电解质的应用情况.