Battery performance of PMMA-grafted PE separators prepared by pre-irradiation grafting technique |
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Authors: | Sung-Jin Gwon Jae-Hak Choi Joon-Yong Sohn Youn-Mook Lim Young-Chang Nho Young-Eon Ihm |
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Affiliation: | 1. Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup-si, Jeollabuk-do 580-185, Republic of Korea;2. Department of Materials Engineering, Chnugnam National University, Yuseong-gu, Daejeon 305-764, Republic of Korea |
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Abstract: | Poly(methyl methacrylate)-grafted polyethylene (PE-g-PMMA) separators were prepared by pre-irradiation grafting technique of methyl methacrylate onto a commercial polyethylene separator. The prepared separators were characterized by using charge/discharge (C/D) cycling test, AC impedance, and thermal stability analyses. Thermal shrinkage (TS) of the PE-g-PMMA separators decreased with an increasing degree of grafting up to 70% above which it was saturated. The PE-g-PMMA separators showed a better oxidation stability on the anode up to 5 V and a better cycle life performance than the original PE separator. These characteristics make the prepared separators suitable for applications in high voltage secondary lithium batteries. |
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