在双碳目标大背景下,储能行业迎来了全新的快速发展阶段,固态电池因其高能量密度和高安全性而备受关注,而其中的关键功能组分固态聚合物电解质要求具有高室温离子电导率和高力学强度,是近年功能高分子材料的研究热点。为了探索新时代下高分子教学实验的更多可能性,通过经典的阴离子开环聚合获得超支化聚醚“核”为原料,采用配位开环聚合的合成方法制备了一种新型超支化聚合物。由于聚合物臂刚、柔性的可调控性,制备的固态聚合物电解质室温离子电导率和成膜性均可调控,为高性能超支化聚合物电解质的制备提供了通用的制备策略。涉及高分子材料的结构、分子量的精确调控,相关电化学测试,实验条件较为温和和简便,有望推动固态电解质的发展,同时能够为高分子相关专业学生更深入地认识功能高分子材料提供重要的实践基础,启发学生的创新能力。
Under the background of dual-carbon target,the energy storage industry has ushered in a new stage of rapid development.Solid-state batteries have attracted much attention due to their high energy density and high safety,while the key functional components of them,solid-state polymer electrolytes (SPEs),are required to have high room-temperature ionic conductivity and high mechanical strength,which has been a hotspot in the research of functional polymer materials in recent years.In order to explore more possibilities of polymer teaching experiments in the new era,in this work,a new hyperbranched polymer was prepared by the synthetic method of coordination ring-opening polymerization using a hyperbranched polyether ‘nuclei’ obtained through classical anionic ring-opening polymerization as the raw material.Due to the tunability of the rigidity and flexibility of the polymer arms,the room-temperature ionic conductivity and film-forming properties of the prepared SPEs could be tuned,which provided a general preparation strategy for the preparation of high-performance hyperbranched polymer electrolytes.This research involved the precise regulation of the structure and molecular weight of polymer materials,relevant electrochemical testing,and the experimental conditions were relatively mild and simple,which was expected to promote the development of solid electrolyte,and provide an important practical basis for students majoring in polymer-related fields to have a deeper understanding of functional polymer materials and inspire students' innovation ability.
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基金资助
国家自然科学基金委重点项目(21835003);江苏省重点研发计划项目(BE2019120);江苏省自然科学基金项目(BK BK20210601);南京邮电大学教学研究项目(JG03023JX53)
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