分离器(采油)
材料科学
膜
倍半硅氧烷
静电纺丝
化学工程
纳米纤维
电化学
热稳定性
离子电导率
电解质
锂离子电池
多孔性
纳米复合材料
高分子化学
聚合物
电极
复合材料
电池(电)
化学
功率(物理)
物理化学
工程类
物理
热力学
量子力学
生物化学
作者
Huijuan Zhao,Nanping Deng,Jing Yan,Weimin Kang,Jingge Ju,Liyuan Wang,Zongjie Li,Bowen Cheng
标识
DOI:10.1016/j.cej.2018.09.010
摘要
In this study, a hybrid Poly-m-phenyleneisophthalamide/Octaphenyl-Polyhedral oligomeric silsesquioxane (PMIA/Octaphenyl-POSS) membrane (HPPS) was fabricated by electrospinning technique and its application performance as lithium-ion battery separators was discussed. The organic-inorganic feature of Octaphenyl-POSS (OPS) endowed admirable compatibility of membrane matrix for the HPPS membranes. The nanofiber membranes with OPS nanoparticles were provided with commendable thermal stability, robust mechanical strength (21.79 MPa), high porosity and electrolyte uptake, which laid a good foundation for improving the safety and cycle performance of the cells with the separator. The lithium-ion battery with the HPPS separator displayed a high ionic conductivity of 1.93 × 10−3 S·cm−1 and a stable electrochemical window of 4.98 V. More significantly, the HPPS nanofiber membrane based Li/LiCoO2 cell exhibited excellent cycling stability with high first discharge capacity up to 157.9 mAh·g−1 and superior capacity retention of 89.04% after 100 cycles. Therefore, the HPPS separator has extraordinary potential to be used in high-performance lithium-ion battery.
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