Yoonseob Kim教授的高性能全固态锂金属电池研究於能源领域期刊《Advanced Energy Materials》上发表
香港科技大学化学及生物工程学系助理教授Yoonseob Kim领导的研究团队，最近於能源领域的顶级期刊《Advanced Energy Materials》上发表了一篇论文，题目为「基於离子型共价有机框架复合物的高性能全固态锂金属电池」。
论文的作者包括Kim教授丶其博士生黄俊（第一作者）丶博士生李晨丶博士生罗航丶博士後研究员Ki-Taek Bang博士丶可持续能源工程学工学士2023年毕业生Albert Liem，以及来自上海交通大学丶浙江大学和韩国汉阳大学的合作研究人员。
论文摘要（只备英文版）:
Ionic covalent organic frameworks (iCOFs) are crystalline materials with stable porous structures. They hold great potential for ion transport, particularly as solid-state electrolytes (SSEs) for all-solid-state lithium metal batteries (ASSLMBs). However, achieving an ionic conductivity of over 10−3 S cm−1 at room temperature using pure-iCOF-based SSEs, even adding additives such as lithium salts, is challenging as the voids work as strong resistances. Thus, highly conductive iCOFs typically require quasi-solid-state configurations with organic solvents or plasticizers. In this study, composites comprising iCOFs and poly(ionic liquid) (PIL) are prepared to make all-solid-state iCOFs electrolytes with an exceptional ionic conductivity up to 1.50 × 10−3 S cm−1 and a high Li+ transference number of > 0.80 at room temperature. Combined experimental and computational studies show that the co-coordination and competitive coordination mechanism established between the PIL, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and iCOFs enabled rapid Li+ transport while restricting TFSI− movement. ASSLMB cells, made of composite SSEs and LiFePO4 composite cathode, demonstrate an initial discharge capacity of 141.5 mAh g−1 at 1C and r.t., with an impressive capacity retention of 87% up to 800 cycles. Overall, this work presents a breakthrough approach for developing advanced SSEs for next-generation high-energy-density ASSLMBs.