Porous Organic Cage‑Based Quasi‑Solid‑State Electrolyte with Cavity‑Induced Anion‑Trapping Effect for Long‑Life Lithium Metal Batteries  

作　　者：Wei-Min Qin Zhongliang Li Wen‑Xia Su Jia‑Min Hu Hanqin Zou Zhixuan Wu Zhiqin Ruan Yue‑Peng Cai Kang Li Qifeng Zheng 

机构地区：[1]School of Chemistry,South China Normal University,Guangzhou 510006,People’s Republic of China [2]Key Laboratory of Functional Metal‑Organic Compounds of Hunan Province,College of Chemistry and Material Science,Hengyang Normal University,Hengyang 421008,People’s Republic of China [3]Guangzhou Key Laboratory of Energy Conversion and Energy Storage Materials,Guangzhou 510006,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第2期376-386,共11页纳微快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.92372123);Guangdong Basic and Applied Basic Research Foundation(No.2022A1515012057,2022B1515020005,2023B1515130004);Guangzhou Basic and Applied Basic Research Foundation(No.202201011342).

摘　　要：Porous organic cages(POCs)with permanent porosity and excellent host–guest property hold great potentials in regulating ion transport behavior,yet their feasibility as solid-state electrolytes has never been testified in a practical battery.Herein,we design and fabricate a quasi-solid-state electrolyte(QSSE)based on a POC to enable the stable operation of Li-metal batteries(LMBs).Benefiting from the ordered channels and cavity-induced anion-trapping effect of POC,the resulting POC-based QSSE exhibits a high Li+transference number of 0.67 and a high ionic conductivity of 1.25×10^(−4) S cm^(−1) with a low activation energy of 0.17 eV.These allow for homogeneous Li deposition and highly reversible Li plating/stripping for over 2000 h.As a proof of concept,the LMB assembled with POC-based QSSE demonstrates extremely stable cycling performance with 85%capacity retention after 1000 cycles.Therefore,our work demonstrates the practical applicability of POC as SSEs for LMBs and could be extended to other energy-storage systems,such as Na and K batteries.

关 键 词：Porous organic cage Cavity-induced anion-trapping Quasi-solid-state electrolyte Homogeneous Li+flux Lithium metal battery 

分 类 号：O646[理学—物理化学] TM912[理学—化学]