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首页> 外文期刊>Polymer Composites >PVDF/halloysite nanocomposite-based non-wovens as gel polymer electrolyte for high safety lithium ion battery
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PVDF/halloysite nanocomposite-based non-wovens as gel polymer electrolyte for high safety lithium ion battery

机译：基于PVDF / Holloysite纳米复合材料的非甘油，作为高安全锂离子电池的凝胶聚合物电解质

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Gel polymer electrolyte (GPE) based on electrospun poly(vinylidene fluoride) (PVDF)/halloysite nanotube (HNT) nanocomposite non-wovens was synthesized and its suitability as a separator in lithium-ion battery (LIB) was explored. In this study, HNT played a key role in reducing the average diameter of the electrospun fibers and uplifted the porosity of the non-wovens thereby improving their electrolyte uptake. Due to a reduction in crystallinity and increased % porosity of the PVDF/HNT non-wovens, the ionic conductivity (1.77 mScm(-1)) and ionic transport across the separator were improved. Moreover, this GPE separator exhibited high tensile and puncture strength with negligible thermal shrinkage and a higher melting temperature compared with a commercially available separator, which is vital from the safety perspective. The cycling performance of Li/GPE/LiCoO2 cell was evaluated and it exhibited a high capacity of 138.01 mAhg(-1) with 97% coulombic efficiency for the initial cycle. The cell was stable and retained its high performance with little loss in capacity even after repeated charge-discharge cycles. Such a combination of high ionic conductivity, tensile strength with low thermal shrinkage is seen to be very rare in polymer-based separators. It is noteworthy that this novel GPE outperformed the commercial separator also in the cycle performance. POLYM. COMPOS., 40:2320-2334, 2019. (c) 2018 Society of Plastics Engineers
机译：合成基于Electur纺 - 聚（偏二氟乙烯）（PVDF）/霍氏料纳米管（HNT）纳米复合材料非甘草的凝胶聚合物电解质（GPE），并探讨了锂离子电池（LIB）中的分离器的适用性。在这项研究中，HNT在降低电纺纤维的平均直径方面发挥了关键作用，并提升了非织造件的孔隙率，从而改善了它们的电解质吸收。由于结晶度降低和PVDF / HNT非织造件的孔隙率升高，离子电导率（1.77mSCM（-1））和分离器的离子输送得到改善。此外，该GPE分离器与可忽略的热收缩率和较高的熔化温度与可商购的分离器相比，具有可忽略的热收缩和较高的熔化温度，这是一种从安全视角至关重要的。评估Li / GPE / LiCoO2细胞的循环性能，并且它具有138.01mAhg（-1）的高容量，为初始循环具有97％的库仑效率。即使在重复的电荷放电循环后，该电池稳定并保留其高性能几乎没有损失。在聚合物基分离器中看到这种高离子电导率的组合，具有低热收缩的拉伸强度，在聚合物基分离器中非常罕见。值得注意的是，这种新型GPE也在循环性能中表现出商业分离器。聚合物。 Compos。，40：2320-2334,2019。（c）2018年塑料工程师协会

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  • 来源
    《Polymer Composites》 |2019年第6期|共15页
  • 作者

    Khalifa Mohammed; Janakiraman S.; Ghosh Sudipto; Venimadhav A.; Anandhan S.;

  • 作者单位

    Natl Inst Technol Karnataka Dept Met &

    Mat Engn Mangaluru 575025 Karnataka India;

    Indian Inst Technol Kharagpur Dept Met &

    Mat Engn Kharagpur 721302 W Bengal India;

    Indian Inst Technol Kharagpur Dept Met &

    Mat Engn Kharagpur 721302 W Bengal India;

    Indian Inst Technol Kharagpur Cryogen Engn Ctr Kharagpur 721302 W Bengal India;

    Natl Inst Technol Karnataka Dept Met &

    Mat Engn Mangaluru 575025 Karnataka India;

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  • 中图分类 增强塑料、填充塑料;
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