Thermal Stability Enhancement of Polyethylene Separators by Gamma-ray Irradiation for Lithium Ion Batteries

Ki Jae Kim; Min-Sik Park; Hansu Kim; Young-Jun Kim

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Thermal Stability Enhancement of Polyethylene Separators by Gamma-ray Irradiation for Lithium Ion Batteries

机译：γ射线辐照锂离子电池增强聚乙烯隔膜的热稳定性

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The thermal stability of polyethylene (PE) separators irradiated by 50,100, and 150 kGy dose gamma-rays is investigated when they are exposed to high-temperature environments. The gamma-ray irradiated separators have much lower Gurley numbers and higher ionic conductivity than a non-irradiated separator after storage at 100 and 120℃. These results indicate that the thermal stability of PE separators can be drastically improved by gamma-ray irradiation. Even after storage at 120℃ for 1h, the gamma-ray irradiated separator is maintaining its own structure. A cell assembled with a gamma-ray irradiated separator exhibits better rate-capability and cyclic performance than a pristine PE separator. The positive effects of gamma-ray irradiation are examined in detail with the purpose of improving battery performance.

机译：研究了聚乙烯（PE）隔膜在暴露于高温环境下时受到50,100和150 kGy剂量伽马射线辐照的热稳定性。分别在100和120℃下储存后，γ射线辐照的隔板比未辐照的隔板具有更低的Gurley数和更高的离子传导率。这些结果表明，可以通过γ射线辐照极大地提高PE隔板的热稳定性。即使在120℃下存放1小时，伽马射线辐照的隔板仍保持其自身的结构。组装有伽马射线辐照隔板的电池比原始的PE隔板具有更好的速率能力和循环性能。为了改善电池性能，详细检查了伽马射线辐照的正面效果。

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《Japanese journal of applied physics》 |2012年第9issue3期|09MB03.1-09MB03.4|共4页
作者
Ki Jae Kim; Min-Sik Park; Hansu Kim; Young-Jun Kim;
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Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, Gyeonggi 463-816, Republic of Korea;

Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, Gyeonggi 463-816, Republic of Korea;

Department of Energy Engineering, Hanyang University, Seoul 133-791, Republic of Korea;

Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam, Gyeonggi 463-816, Republic of Korea;

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Thermal Stability Enhancement of Polyethylene Separators by Gamma-ray Irradiation for Lithium Ion Batteries

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