MG49-KOH-PC alkaline gel polymer electrolytes membrane for supercapacitors

2012 IEEE Colloquium on Humanities, Science and Engineering (CHUSER) Pub Date : 2012-12-01 DOI:10.1109/CHUSER.2012.6504387

Z. Mahmud, N. Zaki, R. Subban, A. M. Ali, M. Yahya

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引用次数: 3

Abstract

The effects of addition of potassium hydroxide (KOH) as doping salt in 49 % poly (methyl methacrylate)-grafted-natural rubber (MG49) were investigated. The free standing polymer electrolyte films doped with various wt. %of KOH salt was prepared by solution cast technique. The interaction between polymer and salt was confirmed by Fourier Transform Infrared (FTIR) spectroscopy studies. Ionic conductivity of the electrolyte films were studied by AC Impedance Spectroscopy. The highest ionic conductivity value obtained for the solid polymer electrolyte (SPE) is ∼10−7 S cm−1 at 25 wt. % of KOH. The increase and decrease in ionic conductivity are coupled with ion association and dissociation phenomena. Plasticized electrolyte film with 50 wt. % of PC exhibited an ionic conductivity of one order higher than the unplasticized film. The effect of ion associations is investigated and found to be closely related to the glass transition temperature (Tg) value of the film, in which decreases with the addition of propylene carbonate (PC) plasticizer.

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MG49-KOH-PC碱性凝胶聚合物电解质超级电容器膜

研究了添加氢氧化钾(KOH)作为掺杂盐对49%聚甲基丙烯酸甲酯接枝天然橡胶(MG49)的影响。采用溶液浇铸法制备了掺杂不同质量分数的KOH盐的独立聚合物电解质薄膜。通过傅里叶变换红外光谱(FTIR)研究证实了聚合物与盐的相互作用。用交流阻抗谱法研究了电解质膜的离子电导率。固体聚合物电解质(SPE)在25 wt. %的KOH下获得的最高离子电导率值为~ 10−7 S cm−1。离子电导率的增加和减少与离子缔合和解离现象相耦合。添加PC量为50%的塑化电解质膜的离子电导率比未塑化膜高一个数量级。研究了离子结合力对薄膜玻璃化转变温度(Tg)的影响，发现其与薄膜玻璃化转变温度(Tg)值密切相关，Tg值随着碳酸丙烯酯(PC)增塑剂的加入而降低。

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2012 IEEE Colloquium on Humanities, Science and Engineering (CHUSER)

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