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Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke

机译：开发可生物降解的固体聚合物电解质，包含不同的纳米粒子用于双电层电容器/ Chong mee Yoke

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The increasing demand, rapid consumption of fossil fuels and undesirable consequencesudof environmental pollution are the alarming concerns from the last few decades.udTherefore, much effort has been made to develop biodegradable solid polymer electrolyteud(SPE) using natural polymer as host polymer for energy storage and energy conversionuddevices. The choice of natural polymers as host polymer for the preparation of SPE areudhydroxylpropylmethyl cellulose (HPMC) and hydroxylethyl cellulose (HEC). As a result,udHEC has been chosen in this study because it has huge amount of hydroxyl groupsudcompared to cellulose and its derivatives. Consequently, it assists in the adsorption ofudcharge carriers, which results in the improvement of charge storage capacity. However,udpreparation of biodegradable SPE by using solution casting technique exhibits low ionicudconductivity. Thus, green ionic liquid (1-ethyl-3-methylimidazolium trifluoromethanesulfonateud(EMIMTf)) and nanoparticles (fumed silica (fumed SiO2), copper(II) oxideud(CuO) and yttrium(III) oxide (Y2O3)) have been incorporated into the biodegradable SPEudalong with magnesium trifluoromethanesulfonate (MgTf2) salt as mobile charge carriersudto improve its ionic conductivity for electric double layer capacitor (EDLC). Electricuddouble layer capacitor has been chosen over batteries owing to their good thermal andudchemical stability, higher potential window (which leads to high energy density) andudlonger cycling stability. Based on the findings, cell fabricated by inclusion of 2 wt. % ofudCuO nanoparticles obtained the highest specific capacitance (36.7 F/g) at scan rate of 5udmV/s along with the lowest charge transfer resistance (25.0 Ω) whereas cell fabricated byud2 wt. % of Y2O3 nanoparticles achieved the highest capacitance retention of 91.3 % overud3,000 cycles at current density of 0.4 A/g.
机译：过去几十年来，不断增长的需求，化石燃料的快速消耗以及对环境污染的不良影响一直是令人担忧的问题。 ud因此，人们已经进行了很多努力来开发以天然聚合物为主体的可生物降解的固体聚合物电解质用于储能和能量转换的聚合物 uddevices。用于制备SPE的天然聚合物作为主体聚合物的选择是二羟丙基甲基甲基纤维素（HPMC）和羟乙基纤维素（HEC）。因此，本研究选择了 udHEC，因为它与纤维素及其衍生物相比具有大量的羟基。因此，它有助于电荷载体的吸附，这导致电荷存储容量的提高。然而，采用溶液流延技术制备生物可降解SPE表现出较低的离子导电性。因此，绿色离子液体（1-乙基-3-甲基咪唑三氟甲磺酸盐 ud（EMIMTf））和纳米颗粒（气相二氧化硅（气相二氧化硅），氧化铜（II） ud（CuO）和氧化钇（III）（Y2O3））已与三氟甲磺酸镁（MgTf2）盐一起作为可生物降解的SPE udalong udud，以提高其对双电层电容器（EDLC）的离子电导率。由于其良好的热稳定性和化学稳定性，较高的电势窗口（导致较高的能量密度）和较长的循环稳定性，因此选择了双电层电容器代替了电池。基于该发现，通过包含2wt。 ％的udCuO纳米粒子在5 udmV / s的扫描速率下获得最高的比电容（36.7 F / g），同时电荷转移电阻最低（25.0Ω），而由ud2 wt。在电流密度为0.4 A / g的情况下，经过ud3,000次循环后，％的Y2O3纳米颗粒实现了91.3％的最高电容保持率。

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    Chong Mee Yoke;

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