Synthesis, Characterization, and Ion-Conductive Behavior in an Organic Solvent and in a Polyether of a Novel Lithium Salt of a Perfluorinated Polyimide Anion
4-pentafluoropentylene sulfonylimide lithium) (LiPPI), has a polyanionic backbone with a repeating unit resembling highly dissociable, thermally and electrochemically stable imide salts, such as lithium bis(trifluoromethylsulfonyl)imide (LiTFSI). The ion-conductive behavior of LiPPI in an organic solvent and in a polyether was extensively studied by using pulse-gradient spin-echo NMR, in addition to differential
为了获得具有可控的离子转移数的高导电性聚合物电解质,合成并表征了一种新型的聚合物锂盐。全氟聚酰亚胺阴离子的新型锂盐,聚(5-氧代-3-氧-4-三氟甲基-1,2,4-五氟戊烯磺酰亚胺锂)(LiPPI),具有聚阴离子主链,其重复单元非常容易分解,具有热和电化学稳定性的酰亚胺盐,例如双(三氟甲基磺酰基)酰亚胺锂(LiTFSI)。除了差示扫描量热法,复数阻抗测量和动态力学分析以外,还通过使用脉冲梯度自旋回波NMR广泛研究了LiPPI在有机溶剂和聚醚中的离子导电行为。LiPPI在碳酸亚乙酯(EC)中的溶液表现出高度的离解度和高的离子电导率,并且阴离子的自扩散系数低于阳离子。通过将LiPPI溶解在基质聚醚中以制备相容的聚合物合金来制备无溶剂的聚合物电解质,并且新的聚合物合金电解质的离子电导率达到约。10在30°C下-5 S cm -1 尽管有机电解质溶液中的锂离子转移数与EC中的LiTFSI大致相同,但是聚合物合金电解质的表观转移数高于0
Synthesis and characterization of fluorinated ionomer p-perfluoro-[1-(2-sulfonic)ethoxy]ethylated polyacrylonitrile-styrene
Fluorinated ionomer p-perfluoro[1-(2-sulfonic)ethoxy]ethylated polyacrylonitrile-styrene (SFAS) (5) was synthesized via electron transfer reaction between polyacrylonitrile-styrene (AS) (1) and perfluoro-di[2-(2-fluorosulfonyl)ethoxy]propionyl peroxide (FAP) (2) and followed by alkali hydrolysis and acidification of p-perfluoro[1-(2-fluorosulfonyl)ethoxy]ethylated polyacrylonitrile-styrene (3). The
通过聚丙烯腈-苯乙烯(AS)(1)与全氟-二[2-(2 )之间的电子转移反应合成了氟化离聚物对-全氟[1-(2-磺酸)乙氧基]乙基化聚丙烯腈-苯乙烯(SFAS)(5)。-过氟-磺酰基)乙氧基]丙酰过氧化物(FAP)(2),然后将对-全氟[1-(2-氟磺酰基)乙氧基]乙基化的聚丙烯腈-苯乙烯进行碱水解和酸化(3)。FTIR和19很好地表征了离聚物5的微观结构1 H NMR。其发生脱磺以上197℃用TGA,取代通过滴定测定的程度(DS)和离子交换容量(IEC)发现通过改变的摩尔比控制良好2:1。由离聚物5制成的质子交换膜在25℃下具有13.4至135.3%的吸水率和高达10 -2 S cm -1的电导率。
New preparation of 1,1,2,2-tetrafluoro-2-(trifluoroethenyloxy)-ethanesulfonyl fluoride
作者:Nobuyuki Uematsu、Nobuto Hoshi、Masanori Ikeda
DOI:10.1016/j.jfluchem.2006.09.005
日期:2006.12
A newpreparationmethod of 1,1,2,2-tetrafluoro-2-(trifluoroethenyloxy)-ethanesulfonyl fluoride (8) has been developed utilizing the unique performance of the imidazole protectivegroup. Namely, the electrodonating character of the imidazole protectivegroup on the sulfonyl group enables the formation of the novel intermediate monomer, which can be easily converted to 8 by the reaction with HF.