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首页> 外文期刊>Journal of power sources >Li/LiFePO_4 batteries with gel polymer electrolytes incorporating a guanidinium-based ionic liquid cycled at room temperature and 50 ℃
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Li/LiFePO_4 batteries with gel polymer electrolytes incorporating a guanidinium-based ionic liquid cycled at room temperature and 50 ℃

机译:带有凝胶聚合物电解质的Li / LiFePO_4电池,结合了胍基离子液体,在室温和50℃下循环

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摘要

Gel polymer electrolytes composed of PVdF-HFP microporous membrane incorporating a guanidinium-based ionic liquid with 0.8 mol kg~(-1) lithium bis(trifluoromethanesulfonylimide) are characterized as the electrolytes in Li/LiFePO_4 batteries. The ionic conductivity of these gel polymer electrolytes is 3.16 × 10~(-4) and 8.32 × 10~(-4)Scm~(-1) at 25 and 50℃, respectively. The electrolytes show good interfacial stability towards lithium metal and high oxidation stability, and the decomposition potential reaches 5.3 and 4.6V (vs. Li/Li~+) at 25 and 50℃, respectively. Li/LiFePO_4 cells using the PVdF-HFP/lgl3TFSI-LiTFSl electrolytes show good discharge capacity and cycle stability, and no significant loss in discharge capacity of the battery is observed over 100 cycles. The cells deliver the capacity of 142 and 150mAhg~(-1) at the 100th cycling at 25 and 50 ℃, respectively.
机译:由PVdF-HFP微孔膜组成的凝胶聚合物电解质被表征为Li / LiFePO_4电池中的电解质,该电解质与基于胍盐的离子液体和0.8 mol kg〜(-1)的双(三氟甲烷磺酰亚胺)锂形成。这些凝胶聚合物电解质在25和50℃下的离子电导率分别为3.16×10〜(-4)和8.32×10〜(-4)Scm〜(-1)。该电解质对金属锂具有良好的界面稳定性,并具有较高的氧化稳定性,在25℃和50℃时分解电位分别达到5.3V和4.6V(vs。Li / Li〜+)。使用PVdF-HFP / lg13TFSI-LiTFS1电解质的Li / LiFePO_4电池显示出良好的放电容量和循环稳定性,并且在100次循环中未观察到电池放电容量的明显损失。在25和50℃的第100次循环中,电池的容量分别为142和150mAhg〜(-1)。

著录项

  • 来源
    《Journal of power sources》 |2011年第15期|p.6502-6506|共5页
  • 作者单位

    School of Chemistry and Chemical Technology, Shanghai Jiaotong University. Shanghai 200240. China;

    School of Chemistry and Chemical Technology, Shanghai Jiaotong University. Shanghai 200240. China,Hirano Institute for Materials Innovation. Shanghai Jiaotong University, Shanghai 200240, China;

    School of Chemistry and Chemical Technology, Shanghai Jiaotong University. Shanghai 200240. China;

    School of Chemistry and Chemical Technology, Shanghai Jiaotong University. Shanghai 200240. China;

    School of Chemistry and Chemical Technology, Shanghai Jiaotong University. Shanghai 200240. China;

    Hirano Institute for Materials Innovation. Shanghai Jiaotong University, Shanghai 200240, China;

    Department of Chemistry and Chemical Engineering, Faculty of Engineering, Yamagata University, Yamagata 992-8510,Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    lithium metal polymer battery; gel polymer electrolytes; cuanidinium-based ionic liquid;

    机译:锂金属聚合物电池;凝胶聚合物电解质;胍基离子液体;

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