材料科学
电解质
超分子化学
准固态
化学工程
纳米技术
离子
快离子导体
纳米笼
电导率
电极
催化作用
有机化学
分子
物理化学
化学
色素敏化染料
工程类
作者
Yongbing Xie,Liang Xu,Tao Yan,Yuan Ouyang,Qinghan Zeng,Dixiong Li,Yingbo Xiao,Shuai Yu,Xiaolong Liu,Cheng Zheng,Qi Zhang,Shaoming Huang
标识
DOI:10.1002/adma.202401284
摘要
The development of solid-state electrolytes (SSEs) with outstanding comprehensive performance is currently a critical challenge for achieving high energy density and safer solid-state batteries (SSBs). In this study, a strategy of nano-confined in situ solidification was proposed to create a novel category of molten guest-mediated metal-organic frameworks, named MGM-MOFs. By embedding the newly developed molten crystalline organic electrolyte (ML20) into the nanocages of anionic MOF-OH, MGM-MOF-OH, characterized by multi-modal supramolecular interaction sites and continuous negative electrostatic environments within nano-channels, was achieved. These nanochannels promote ion transport through the successive hopping of Li+ between neighbored negative electrostatic environments and suppress anion movement through the chemical constraint of the hydroxyl-functionalized pore wall. This results in remarkable Li+ conductivity of 7.1 × 10-4 S cm-1 and high Li+ transference number of 0.81. Leveraging these advantages, the SSBs assembled with MGM-MOF-OH exhibit impressive cycle stability and a high specific energy density of 410.5 Wh kganode + cathode + electrolyte-1 under constrained conditions and various working temperatures. Unlike flammable traditional MOFs, MGM-MOF-OH demonstrates high robustness under various harsh conditions, including ignition, high voltage, and extended to humidity. This article is protected by copyright. All rights reserved.
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