Cross-linked fibrous composite separator for high performance lithium-ion batteries with enhanced safety
Cross-linked fibrous composite separator for high performance lithium-ion batteries with enhanced safety
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DOI：
10.1016/j.memsci.2017.01.015
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发表时间：
2017-04-01
影响因子：
9.5
通讯作者：
Kim, Dong-Won
中科院分区：
文献类型：
--
作者：
Park, Sae-Rom;Jung, Yun-Chae;Kim, Dong-Won
将活性二氧化硅纳米颗粒与三（乙二醇）二丙烯酸酯在纤维聚丙烯腈（PAN）膜上热交联制备了交联纤维复合隔膜。通过化学交联，二氧化硅颗粒牢固地附着在PAN纳米纤维上，这种交联纤维复合材料分离器呈现出三维的、完全互连的网络结构。该隔膜在高温下具有良好的电解质润湿性和良好的热稳定性。由石墨负极、液体电解质浸泡的交联纤维复合隔膜和LiNi0.6Co0.6Mn0.2O2正极组成的锂离子电池循环性能和热安全性优于传统聚丙烯隔膜制备的电池。
A cross-linked fibrous composite separator was prepared by thermal cross-linking between reactive silica nanoparticles and tri(ethylene glycol) diacrylate on a fibrous polyacrylonitrile (PAN) membrane. The cross linked fibrous composite separator exhibited a three-dimensional and fully interconnected network structure in which the silica particles were firmly attached onto the PAN nanofibers through the chemical cross-linking. The separator showed good electrolyte wettability and excellent thermal stability at elevated temperatures. A lithium-ion cell composed of a graphite negative electrode, the cross-linked fibrous composite separator soaked with liquid electrolyte and a LiNi0.6Co0.6Mn0.2O2 positive electrode exhibited cycling performance and thermal safety superior to those of a cell prepared with a conventional polypropylene separator.