Synthesis and Properties of Polycarbosilanes Having 5-Membered Cyclic Carbonate Groups as Solid Polymer Electrolytes
作者:Kozo Matsumoto、Miho Kakehashi、Hirotaka Ouchi、Masayoshi Yuasa、Takeshi Endo
DOI:10.1021/acs.macromol.6b01516
日期:2016.12.27
of 4 mol equiv of LiTFSI per cyclic carbonate. Differential scanning calorimetry analysis of the polymer revealed that the polymers with a high LiTFSI content formed a crystalline phase around room temperature, but the glass transition temperatures of the amorphous phases were kept low. Infrared analysis suggested the existence of a strong interaction between carbonate carbonyl groups and lithium cations
我们进行了硅烷环丁烷单体1- [2-(2,4-二氧杂-3-戊酰基)乙基] -1-甲基硅环丁烷(SBMC)和1,1-二[2-(2,4-二氧杂- 3-戊酰基)乙基]硅烷基环丁烷(SBDC)分别得到聚SBMC和聚SBDC,并通过添加双(三氟甲磺酰基)酰亚胺锂(LiTFSI)或三氟甲磺酸锂(LiOTf)来测量其离子电导率。聚SBMC和聚SBDC的离子电导率都随着LiTFSI添加量的增加而增加。随着LiTOf含量的增加,polySBMC的离子电导率降低,而增加后,polySBDC的离子电导率降低。PolySBMC和polySBDC的离子电导率分别为6.1×10 –5和1.5×10 –4在每个环状碳酸酯中加入4摩尔当量的LiTFSI之后,分别在30°C下达到S / cm。聚合物的差示扫描量热分析表明,具有高LiTFSI含量的聚合物在室温附近形成结晶相,但是非晶相的玻璃化转变温度保持较低。红外分析表明碳酸酯羰基和锂阳离子之间存在强相互作用。