Nikolakakou Georgia, Pantazidis Christos, Papadakis Vassilis M, Kenanakis George, Loppinet Benoit, Sakellariou Georgios, Glynos Emmanouil
Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1385, 711 10 Heraklion, Crete, Greece.
Department of Chemistry, University of Crete, P.O. Box 2208, 710 03 Heraklion, Crete, Greece.
ACS Macro Lett. 2023 Dec 19;12(12):1665-1671. doi: 10.1021/acsmacrolett.3c00543. Epub 2023 Nov 22.
The development of single-ion solid polymer electrolytes with high ion conductivity holds the key to the realization of safe, long-lasting, high-energy batteries. Here we introduce the use of core-shell nanostructured polyanionic particles, composed of polyanion asymmetric miktoarm stars with a large number of glassy polystyrene-based polyanion arms that complement longer poly(ethylene oxide), PEO, arms, as additives to low molecular weight, liquid PEO. Due to the proposed macromolecular design approach, the polyanion particles are well dispersed for wt % ≤ 55 that enables the formation of a nanostructured single-ion electrolyte with highly interconnected channels composed of liquid PEO that promotes fast ion transport. Noticeably, while the ion conductivity remains fairly unaffected and close to 10 S/cm at room temperature with nanoparticle loading, the shear modulus monotonically increases by several order of magnitudes indicating a very strong decoupling between the antagonistic properties of mechanical modulus and ion conductivity.
开发具有高离子电导率的单离子固体聚合物电解质是实现安全、长效、高能电池的关键。在此，我们介绍了使用核壳纳米结构的聚阴离子颗粒，其由具有大量玻璃态聚苯乙烯基聚阴离子臂的聚阴离子不对称米克托臂星组成，这些臂与较长的聚环氧乙烷（PEO）臂互补，作为低分子量液体PEO的添加剂。由于所提出的大分子设计方法，聚阴离子颗粒在重量百分比≤55%时能很好地分散，这使得能够形成具有由液体PEO组成的高度互连通道的纳米结构单离子电解质，从而促进快速离子传输。值得注意的是，虽然纳米颗粒负载时离子电导率在室温下基本不受影响且接近10 S/cm，但剪切模量单调增加几个数量级，这表明机械模量和离子电导率的拮抗性质之间存在非常强的解耦。
