Flexible Organic Inorganic Hybrid Solid Electrolytes Formed via Thiol Acrylate Photopolymerization
Flexible Organic Inorganic Hybrid Solid Electrolytes Formed via Thiol Acrylate Photopolymerization
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DOI：
10.1021/acs.macromol.7b00035
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发表时间：
2017-03-14
期刊：
影响因子：
5.5
通讯作者：
Xie, Xiaolin
中科院分区：
文献类型：
--
作者：
Hu, Ji;Wang, Wanhui;Xie, Xiaolin
以一系列巯基修饰的二氧化硅纳米粒子和聚乙二醇二丙烯酸酯为原料，在紫外光照射下通过巯基-丙烯酸酯光聚合反应制备了具有可控网络结构的新型柔性有机-无机杂化固体电解质（cnHSEs）。由于在固态核磁共振谱中很容易识别的突出的锂离子迁移率，柔性cnHSE即使在-20 ° C的低温下也表现出相对高的离子电导率，并且在30 ° C下高达7.3 x 10（-4）S cm（-1）的最大值。本文的离子电导率高于相同温度下典型固体聚合物电解质的离子电导率。此外，由于二氧化硅纳米颗粒的清除作用，锂离子迁移数也同时提高了0.7以上。此外，cnHSE显示出宽的电化学稳定性窗口，并且所制造的包含LiInHSE 5ILiFePO（4）的电池表现出高度可逆的电化学反应和稳定的循环性能。
Novel flexible organic-inorganic hybrid solid electrolytes with controlled network structures (cnHSEs) were formed via thiol-acrylate photopolymerization under UV irradiation, using a series of thiol-modified silica nanoparticles and poly(ethylene glycol) diacrylate. Because of the outstanding lithium ion mobility that is readily identifiable in the solid-state nuclear magnetic resonance spectra, the flexible cnHSEs demonstrate a relatively high ionic conductivity even at low temperature of-20 degrees C and up to the maximum of 7.3 x 10(-4) S cm(-1) at 30 degrees C. The ionic conductivity herein is higher than that for typical solid polymer electrolytes at the identical temperature. Additionally, the lithium ion transference number is also improved simultaneously up to 0.7 more due to the scavenger effect of silica nanoparticles embedded in the system. Moreover, the cnHSEs show a broad electrochemical stability window, and the fabricated cell comprising LiIcnHSEsILiFePO(4) exhibits a highly reversible electrochemical reaction and stable cycling performance.