Lithium Ion Conduction in PVdC-co-AN Based Polymer Blend Electrolytes Doped with Different Lithium Salts
Lithium Ion Conduction in PVdC-co-AN Based Polymer Blend Electrolytes Doped with Different Lithium Salts
复制标题
掺杂不同锂盐的 PVdC-co-AN 基聚合物共混电解质中的锂离子传导
DOI：
10.3139/217.3075
复制
发表时间：
2015
影响因子：
1.3
通讯作者：
Chithra M. Mathew
中科院分区：
文献类型：
--
作者：
C. Subbu;S. Rajendran;K. Kesavan;Chithra M. Mathew
摘要通过锂盐与聚氧化乙烯（PEO）和聚偏二氯乙烯-丙烯腈共聚物（PVdC-co-AN）的络合反应制备的聚合物电解质将在锂聚合物电池中作为隔膜得到广泛的应用。混合电解质的无定形性质表明，通过添加锂盐，电导率增加。傅里叶变换红外研究证实了PVdC-co-AN中C≡N和C=N的存在。在所研究的各种锂盐中，三氟甲烷磺酰亚胺锂[LiN（CF 3SO 2）2]基电解质在室温下表现出最高的离子电导率，约为0.265 × 10−5 Scm−1。具有最大离子电导率PEO（80重量%）/PVdC-co-AN（20重量%）/LiN（CF 3SO 2）2（8重量%）的样品由UV-可见光分析中的较低光学带隙和发光研究中的低强度支持。上述样品的二维和三维形貌图像揭示了微孔的存在。通过热重/差热分析研究了所制备的电解质的热稳定性。使用差示扫描量热分析，观察到掺杂LiN（CF 3SO 2）2的样品的最低玻璃化转变温度（30°C）。循环伏安研究表明，所制备的聚合物电解质具有较强的电容行为。用线性扫描伏安法观察了所制备样品的电化学稳定窗口。
Abstract Polymer electrolytes prepared by the complexation of lithium salts with poly(ethylene oxide) (PEO) and poly(vinylidene chloride-co-acrylonitrile) (PVdC-co-AN) will be of great use as separators in lithium polymer batteries. The amorphous nature of the blend electrolyte shows that the conductivity increases by the addition of lithium salts. The presence of C≡N and C=N in PVdC-co-AN are confirmed from the Fourier transform infrared studies. Among the various lithium salts studied, lithium trifluoro methane sulfonoimide [LiN(CF3SO2)2] based electrolyte exhibits the highest ionic conductivity of the order of 0.265 × 10−5 Scm−1 at room temperature. The sample having a maximum ionic conductivity PEO(80 wt%)/PVdC-co-AN(20 wt%)/LiN(CF3SO2)2(8 wt%) is supported by the lower optical band gap in UV-Visible analysis and low intensity in luminescence studies. Two and three dimensional topographic images of the above sample reveal the presence of micropores. Thermal stability of the prepared electrolytes is studied by thermo gravimetric/differential thermal analysis. Using differential scanning calorimetric analysis, the minimum glass transition temperature (30°C) is observed for the sample doped with LiN(CF3SO2)2. The cyclic voltammetric studies reveal the strong capacitive behavior of the prepared polymer electrolytes. The electrochemical stability windows for the prepared samples are observed using linear sweep voltammetry.