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The effect of poly(hydroxyl ethyl methacrylate) on the performance of PVDF/P(MMA-co-HEMA) hybrid gel polymer electrolytes for lithium ion battery application
Polymer ( IF 4.6 ) Pub Date : 2020-03-31 , DOI: 10.1016/j.polymer.2020.122427
Seifollah Jamalpour , Maral Ghahramani , Seyed Reza Ghaffarian , Mehran Javanbakht

Gel polymer electrolyte (GPE) membranes containing poly(vinylidene fluoride) (PVDF), PVDF/SiO2-g-poly(methyl methacrylate) (PMMA) and PVDF/SiO2-g-p(methyl methacrylate-co-hydroxyl ethyl methacrylate) (PMMA-co-HEMA) organic-inorganic hybrid nanoparticles were prepared by phase inversion method, in which PMMA and P(MMA-co-HEMA) were successfully grafted onto the surface of SiO2 nanoparticles by the atom transfer radical polymerization method. The structure and properties of the membranes were characterized using the Fourier transform infrared spectroscopy (FT-IR), 1H nuclear magnetic resonance (1H NMR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) techniques. In addition, the performances of pristine PVDF and PVDF nanocomposites based gel polymer electrolytes in terms of ionic conductivity, linear sweep voltammetry (LSV), C-rate and cycling performance were investigated. The performance of the prepared membranes combined with 1M LiClO4 in propylene carbonate improved by introducing HEMA groups (GPE3). The ionic conductivity of GPE3 was 2.63 mS cm−1 at 298K. The electrochemical stability window of SiO2-g-P(MMA-co-HEMA) containing GPE was established to be as high as 4.8V (vs. Li/Li+). Besides, the Li/LiMn2O4 cell with the GPE3 showed excellent cyclic stability and rate performance. The results suggest the GPE3 is promising to be applied for rechargeable Li batteries with high safety and long cycle life.



中文翻译:

聚甲基丙烯酸羟乙酯对锂离子电池应用PVDF / P(MMA-co-HEMA)混合凝胶聚合物电解质性能的影响

包含聚偏二氟乙烯(PVDF),PVDF / SiO 2 - g-聚(甲基丙烯酸甲酯)(PMMA)和PVDF / SiO 2 - g -p(甲基丙烯酸甲酯-羟基甲基丙烯酸乙酯)的凝胶聚合物电解质(GPE)膜)(PMMA- CO -HEMA)有机-无机杂化的纳米颗粒通过相转化方法,其中,PMMA和P(MMA-制备-HEMA)被成功地接枝到二氧化硅的表面2层由原子转移自由基聚合方法的纳米颗粒。膜的结构和性能使用傅立叶变换红外光谱(FT-IR),1 H核磁共振(1 H NMR),热重分析(TGA),差示扫描量热法(DSC)和扫描电子显微镜(SEM)技术。此外,还研究了原始PVDF和PVDF纳米复合材料基凝胶聚合物电解质在离子电导率,线性扫描伏安法(LSV),C速率和循环性能方面的性能。通过引入HEMA基团(GPE3),制备的膜与1M LiClO 4在碳酸亚丙酯中的性能得到改善。GPE3在298K的离子电导率为2.63 mS cm -1。含有GPE的SiO 2 - g - P(MMA- co- HEMA)的电化学稳定性窗口被确定为高达4.8V(vs. Li / Li +)。此外,具有GPE3的Li / LiMn 2 O 4电池显示出优异的循环稳定性和倍率性能。结果表明,GPE3有望用于安全性高,循环寿命长的可充电锂电池。

更新日期:2020-03-31
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