Solid-State Polymer Electrolytes Based on AB3-Type Miktoarm Star Copolymers,ACS Macro Letters

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Solid-State Polymer Electrolytes Based on AB3-Type Miktoarm Star Copolymers
ACS Macro Letters ( IF 5.1 ) Pub Date : 2018-08-10 00:00:00 , DOI: 10.1021/acsmacrolett.8b00474
Daeyeon Lee ₁ , Ha Young Jung ₁ , Moon Jeong Park ₁

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Miktoarm star copolymers composed of three poly(ethylene oxide) (PEO) arms connected to one polystyrene (PS) chain, i.e., PS–(PEO)₃, demonstrated synergistic improvements in the ionic conductivity and mechanical strength by factors of 2–30 compared to those shown by PS–PEO diblock copolymers. Entropic constraints for the chain stretching of (PEO)₃ gave rise to notably reduced domain sizes of PS–(PEO)₃ electrolytes, compared with the values of PS–PEO analogues. Further, the melting transition of PS–(PEO)₃ with PEO molecular weight of M_n = 2 kg mol^–1 was vanished with lithium salt doping at [Li]/[EO] = 0.06 under such confinements, resulting in an order of magnitude increase in the room temperature conductivity. The fact that lithium ion transport in PEO-based copolymers can be tunable by the way PEO chains are connected to hard polymers can lead to innovative designs for solid-state polymer electrolytes.

中文翻译：

基于 AB3 型 Miktoarm Star 共聚物的固态聚合物电解质

Miktoarm 星形共聚物由三个与一个聚苯乙烯 (PS) 链相连的聚 (环氧乙烷) (PEO) 臂组成，即 PS–(PEO) ₃，在离子电导率和机械强度方面表现出协同改进，与之前相比提高了 2-30 倍与 PS-PEO 二嵌段共聚物显示的一样。与 PS-PEO 类似物的值相比，(PEO) 3 链拉伸的熵约束导致 PS-(PEO) 3 电解质_的域尺寸显着减小_。此外，当PEO 分子量为M _n = 2 kg mol ^{–1时，PS–(PEO)}₃的熔融转变在这样的限制下，在[Li] / [EO] = 0.06的锂盐掺杂下消失，导致室温电导率增加一个数量级。PEO 基共聚物中的锂离子传输可以通过 PEO 链与硬聚合物连接的方式进行调节，这一事实可以导致固态聚合物电解质的创新设计。

更新日期：2018-08-10

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