Nanocomposite polymer electrolytes based on poly(oxyethylene) and cellulose nanocrystals
Nanocomposite polymer electrolytes based on poly(oxyethylene) and cellulose nanocrystals
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DOI：
10.1021/jp0494483
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发表时间：
2004-07-29
影响因子：
3.3
通讯作者：
Dufresne, A
中科院分区：
文献类型：
--
作者：
Samir, MASA;Alloin, F;Dufresne, A
以高纵横比纤维素晶须和亚胺锂盐为原料，制备了基于高分子量聚氧乙烯（POE）的锂导电纳米复合聚合物电解质。采用差示扫描量热法、热重法和动态力学分析研究了薄膜的热力学行为。纳米复合聚合物电解质的离子电导率和电化学稳定性与锂电池的性能指标基本一致。用脉冲磁场梯度核磁共振测定了离子迁移率，结果表明，增强对锂离子迁移数没有影响。制备了基于束膜蛋白晶须的高性能纳米复合电解质。事实上，填料提供了高增强效果，而相对于未填充的聚合物电解质保留了高水平的离子电导率。
Lithium-conducting nanocomposite polymer electrolytes based on high molecular weight poly(oxyethylene) (POE) were prepared from high aspect ratio cellulosic whiskers and lithium imide LiTFSI salt. The thermomechanical behavior of the resulting films was investigated by differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical analysis. The ionic conductivity and the electrochemical stability of the nanocomposite polymer electrolytes are quite consistent with the specifications of lithium batteries. The ionic mobilities were determined by pulsed magnetic field gradient NMR, and it was shown that the reinforcement does not affect the lithium transference number. High performance nanocomposite electrolytes based on tunicin whiskers were obtained. Indeed, the filler provides a high reinforcing effect, while a high level of ionic conductivity is retained with respect to unfilled polymer electrolytes.