All-solid-state polymer electrolyte (SPE) matrices prepared by molecular design are still needed to be further perfected with excellent performance. In this paper, a controlled-structure discotic liquid crystal (DLC)-based six-arm star copolymer was designed and synthesized from a DLC initiator (2,3,6,7,10,11-hexakis(2-bromoisobutyryloxy)triphenylene) via the sequential atom transfer radical polymerization (ATRP) of styrene and poly(ethylene glycol) methyl ether methacrylate (PEGMA). Here, this class of discotic liquid crystal star polymer is applied as an SPE in LIBs for the first time. By solution casting, a suitable self-standing SPE film composed of the six-arm copolymer and lithium bis(trifluoromethanesulfonimide (LiTFSI)) can be easily formed, and the film shows long-range molecular orientation after annealing. It is confirmed that the electrolyte shows wide electrochemical window (5.1 V) and high lithium-ion transference number (0.37). Especially, the ionic conductivity (1.46 × 10⁻⁴, S cm⁻¹, 30 °C) of the obtained SPE is more than 8 times higher than that of the corresponding linear copolymer electrolytes. Furthermore, the results of battery performance demonstrate that the polymer electrolyte displays eminently reversible electrochemical reaction and outstanding cycling performance. The present work not only shows the advantages of DLC-based star SPE for LIBs but also paves the way for the design of SPE with excellent performances.

仍然需要通过分子设计制备的全固态聚合物电解质（SPE）基质，以优异的性能进一步完善。本文以DLC引发剂（2,3,6,7,10,11-六（2-溴异丁酰氧基）三亚苯基）为原料，设计合成了基于控制结构的盘状液晶（DLC）的六臂星形共聚物。通过苯乙烯和聚（乙二醇）甲基醚甲基丙烯酸甲酯（PEGMA）的顺序原子转移自由基聚合（ATRP）。在此，这种盘状液晶星形聚合物首次被用作LIB中的SPE。通过溶液流延，可以容易地形成由六臂共聚物和双（三氟甲烷磺酰亚胺（LiTFSI））锂组成的合适的自支撑SPE膜，并且该膜在退火后显示出长程分子取向。证实了该电解质显示出宽的电化学窗口（5.1V）和高的锂离子转移数（0.37）。尤其是离子电导率（1.46×10所获得的SPE ^-4，S cm ^-1，30 °C）是相应的线性共聚物电解质的高8倍以上。此外，电池性能的结果表明，聚合物电解质显示出显着的可逆电化学反应和出色的循环性能。本工作不仅展示了基于DLC的LIB星形SPE的优势，而且为性能优异的SPE设计铺平了道路。