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Thermally Stable Electrolyte for Lithium Ion Batteries

机译：锂离子电池的热稳定电解质

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摘要

The weight of gas formed by Li-ion cell components heated to 400℃ was studied by DSC. Electrolyte released the most gas -over 70% of its original weight during the heat treatment, while fully charged cathode and anode released gas at 4.6% and 3.9% of their original weight, respectively. Thus, the weight of gas formed during heat treatment by various solvents, LiPF_6, and electrolytes containing various solvents or lithium salts was studied. Solvent thermal stability was the key to reducing the gas formation of electrolyte at elevated temperature. Electrolyte containing y-butyrolactone (GBL) solvent delayed the venting of Li-ion cells by approximately 50 ℃ compared with conventional electrolyte containing carbonate solvents during a hot box test. Cell venting was observed to be due to gas pressure from electrolyte decomposition in the cell.
机译：用DSC研究了加热到400℃的锂离子电池组件形成的气体的重量。电解质释放的气体最多-在热处理期间超过其原始重量的70％，而充满电的阴极和阳极释放的气体分别为其原始重量的4.6％和3.9％。因此，研究了在热处理期间由各种溶剂，LiPF_6和包含各种溶剂或锂盐的电解质形成的气体的重量。溶剂的热稳定性是减少高温下电解质气体形成的关键。在热箱测试中，与传统的含碳酸盐溶剂相比，含γ-丁内酯（GBL）溶剂的电解质使锂离子电池的排气延迟了约50℃。观察到电池排空是由于电池中电解质分解产生的气压所致。

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  • 来源
    《Battery Safety》|2013年|1-911a1-a2iiia5|共14页
  • 会议地点 San Francisco CA(US)
  • 作者

    C. K. Park; R. Rubino;

  • 作者单位

    Greatbatch, Inc., 10000 Wehrle Drive, Clarence, NY 14031;

    Greatbatch, Inc., 10000 Wehrle Drive, Clarence, NY 14031;

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  • 原文格式 PDF
  • 正文语种 eng
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