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首页> 外文期刊>RSC Advances >Composite electrolytes comprised of poly(ethylene oxide) and silica nanoparticles with grafted poly(ethylene oxide)-containing polymers
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Composite electrolytes comprised of poly(ethylene oxide) and silica nanoparticles with grafted poly(ethylene oxide)-containing polymers

机译：由聚环氧乙烷和二氧化硅纳米粒子与接枝的含聚环氧乙烷的聚合物组成的复合电解质

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摘要

We designed, synthesized and characterized several novel hybrid inorganic/organic nanocomposite electrolytes that consist of poly(ethylene oxide) (PEO) based polymer grafted from silica nanoparticles. Poly(ethylene glycol)methyl ether methacrylate (PEGMA) was tailored on the silica surface through atom transfer radical polymerization (ATRP). A series of silica-polymers were synthesized with different lengths of PEO side chains. Electrolytes were prepared from the functionalized particles and low-molecular weight polyethylene glycol dimethyl ether (PEGDME) with the addition of LiI. Upon the introduction of particles, electrolytes became viscous and gel-like. With the increase of PEO side chains, the viscosity of the electrolytes increased dramatically, among which, silica-poly(PEGMA-1100) became solid-state. The room temperature conductivities of the hybrid silica-polymer electrolytes are in the range of 6 x 10 (5) to 1.2 x 10(-4) S cm(-1). Silica-poly(PEGMA-475) and silica-poly(PEGMA-1100), with higher viscosity, exhibited better ionic conductivity. Surface-initiated copolymerization was also conducted to optimize the electrochemical performance of polymer coated silica nanoparticles.
机译：我们设计，合成和表征了几种新颖的无机/有机纳米复合杂化电解质，其中包括从二氧化硅纳米颗粒接枝的聚环氧乙烷（PEO）基聚合物。聚（乙二醇）甲基醚甲基丙烯酸甲酯（PEGMA）通过原子转移自由基聚合（ATRP）在二氧化硅表面加工而成。合成了一系列具有不同长度PEO侧链的二氧化硅聚合物。由功能化的颗粒和低分子量的聚乙二醇二甲醚（PEGDME）加LiI制备电解质。引入颗粒后，电解质变得粘稠且呈凝胶状。随着PEO侧链的增加，电解质的粘度急剧增加，其中，二氧化硅-聚（PEGMA-1100）成为固态。杂化二氧化硅-聚合物电解质的室温电导率在6 x 10（5）到1.2 x 10（-4）S cm（-1）的范围内。具有较高粘度的二氧化硅-聚（PEGMA-475）和二氧化硅-聚（PEGMA-1100）具有较好的离子电导率。还进行了表面引发的共聚反应，以优化聚合物包覆的二氧化硅纳米粒子的电化学性能。

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