کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6614263 | 459623 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and characterization of safety PVDF/P(MMA-co-PEGMA) active separators by studying the liquid electrolyte distribution in this kind of membrane
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Microporous polymer separators and corresponding gel electrolyte have been widely used in lithium ion batteries. This work aims to explore a safety microporous separator for lithium ion batteries by studying the distribution and stability mechanism of liquid electrolyte in this kind of separator. A comb polymer P(MMA-co-PEGMA) was synthesized and blended into poly(vinylidene ï¬uoride) (PVDF) matrix to prepare porous separators via immersion precipitation phase inversion process. The separators then were immersed in liquid electrolyte to form lithium ion conducting gel polymer electrolyte membranes (GPEs). The influence of P(MMA-co-PEGMA) on the morphology, crystallinity, and the liquid electrolyte uptake and distribution in the porous separators was investigated. The ion conductivity increased with copolymer content and the maximum conductivity value of 3.01 Ã 10â3 S cmâ1 was found at 25 °C in the prepared samples. The Graphite|GPE|LiFePO4 cells assembled with modified separators showed improved capacity retention at various C-rates and higher coulombic efficiency than pure PVDF separators
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 115, 1 January 2014, Pages 317-325
Journal: Electrochimica Acta - Volume 115, 1 January 2014, Pages 317-325
نویسندگان
Hao Li, Chun-Er Lin, Jun-Li Shi, Xiao-Ting Ma, Bao-Ku Zhu, Li-Ping Zhu,