We presented here the synthesis of poly(butylene terephthalate) (PBT) and poly(ethylene oxide) (PEO) alternating multiblock copolymers (mBCPs), (PBT-b-PEO-b-PBT)_n, via a novel cascade polycondensation-coupling ring-opening polymerization (PROP) method. The chemical structure of (PBT-b-PEO-b-PBT)_n mBCPs was revealed by 1D and 2D NMR techniques. By blending with lithium bis(trifluoromethane)sulfonamide (up to r ≡ [Li⁺]/[EO] of 0.20), the mBCP-based solid polymer electrolytes (SPEs) show excellent performance in all-solid-state lithium batteries. Impedance spectroscopy showed that a maximum ionic conductivity, ∼8.2 × 10⁻⁴ S/cm at 90 °C, was achieved at r = 0.10 for the mBCP (76 wt.% PEO) SPEs. A high C_d (charge passed through the symmetric cell before short-circuit) of 441 C/cm² was achieved at the current density of 0.3 mA/cm² at 90 °C. Because of the facile synthesis, the rich molecular architecture of mBCP, and the high melting point of PBT, these new mBCP SPEs provide a new platform for SPE design.

我们在这里介绍了通过新型级联缩聚反应合成聚对苯二甲酸丁二醇酯（PBT）和聚环氧乙烷（PEO）交替多嵌段共聚物（mBCPs）（PBT- b -PEO- b -PBT）_n的方法。开环聚合（PROP）方法。通过1D和2D NMR技术揭示了（PBT- b -PEO- b -PBT）_n mBCP的化学结构。通过与锂双（三氟甲烷）磺酰胺共混（高达ř ≡[李⁺] / [EO]为0.20）时，基于mBCP的固态聚合物电解质（SPE）在全固态锂电池中表现出出色的性能。阻抗谱显示， 对于mBCP（76 wt。％PEO）SPE  ，在r = 0.10时 ，在90°C时可获得最大离子电导率，约为8.2×10 ^-4 S / cm 。在90℃下以0.3mA / cm ²的电流密度实现了441C / cm ²的高C _d（短路前通过对称电池的电荷）。由于易于合成，mBCP的分子结构丰富以及PBT的熔点高，这些新的mBCP SPE为SPE设计提供了新的平台。