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Classy Metal-Organic-Framework-Based Quasi-Solid-State Electrolyte for High-Performance Lithium-Metal Batteries

机译：基于优雅的金属有机框架的准固态电解质，适用于高性能锂金属电池

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摘要

Enhancing ionic conductivity of quasi-solid-state electrolytes (QSSEs) is one of the top priorities, while conventional metal-organic frameworks (MOFs) severely impede ion migration due to their abundant grain boundaries. Herein, ZIF-4 glass, a subset of MOFs, is reported as QSSEs (LGZ) for lithium-metal batteries. With lean Li content (0.12 wt%) and solvent amount (19.4 wt%), LGZ can achieve a remarkable ion conductivity of 1.61 x 10(-4) S cm(-1) at 30 degrees C, higher than those of crystalline ZIF-4-based QSSEs (LCZ, 8.21 x 10(-5) S cm(-1)) and the reported QSSEs containing high Li contents (0.32-5.4 wt%) and huge plasticizer (30-70 wt%). Even at -56.6 degrees C, LGZ can still deliver a conductivity of 5.96 x 10(-6) S cm(-1) (vs 4.51 x 10(-7) S cm(-1) for LCZ). Owing to the grain boundary-free and isotropic properties of glassy ZIF-4, the facilitated ion conduction enables a homogeneous ion flux, suppressing Li dendrites. When paired with LiFePO4 cathode, LGZ cell demonstrates a prominent cycling capacity of 101 mAh g(-1) for 500 cycles at 1 C with the near-utility retention, outperforming LCZ (30.7 mAh g(-1)) and the explored MOF-/covalent-organic frameworks (COF)-based QSSEs. Hence, MOF glasses will be a potential platform for practical quasi-solid-state batteries in the future.
机译：增强准固态电解质（QSSES）的离子电导率是最优先级之一，而常规金属 - 有机框架（MOF）由于其丰富的晶界而严重妨碍离子迁移。这里，ZIF-4玻璃，MOF的子集被报告为锂金属电池的QSSES（LGZ）。具有瘦Li含量（0.12wt％）和溶剂量（19.4wt％），Lgz可以在30℃下达到1.61×10（-4）厘米（-1）的显着离子电导率，高于结晶Zif -4基QSSES（LCZ，8.21 x 10（-5）厘米（-1））和含有高li含量（0.32-5.4wt％）和巨大增塑剂（30-70wt％）的报告的QSSE。即使在-56.6摄氏度下，LGZ也可以为LCZ提供5.96×10（-6）厘米（-1）的电导率为5.96×10（-6）（Vs 4.51 x 10（-7）Cm（-1））。由于玻璃ZIF-4的晶界和各向同性特性，促进的离子传导使得能够均匀离子通量，抑制Li树枝状体。当与LiFePO4阴极配对时，LGZ细胞在1℃下突出的500次循环的突出循环容量，近乎实用电线保持，表现优于LCZ（30.7mah g（-1））和探索的MOF- /共价 - 有机框架（COF）基于QSSES。因此，MOF眼镜将来将成为实际准固态电池的潜在平台。

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  • 来源
    《Advanced Functional Materials》 |2021年第43期|2104300.1-2104300.9|共9页
  • 作者

    Jiang Guangshen; Qu Changzhen; Xu Fei; Zhang En; Lu Qiongqiong; Cai Xiaoru; Hausdorf Steffen; Wang Hongqiang; Kaskel Stefan;

  • 作者单位

    Northwestern Polytech Univ Shaanxi Joint Lab Graphene NPU Sch Mat Sci & Engn State Key Lab Solidificat Proc Xian 710072 Peoples R China|Tech Univ Dresden Dept Inorgan Chem Bergstr 66 D-01062 Dresden Germany;

    Northwestern Polytech Univ Shaanxi Joint Lab Graphene NPU Sch Mat Sci & Engn State Key Lab Solidificat Proc Xian 710072 Peoples R China;

    Northwestern Polytech Univ Shaanxi Joint Lab Graphene NPU Sch Mat Sci & Engn State Key Lab Solidificat Proc Xian 710072 Peoples R China|Tech Univ Dresden Dept Inorgan Chem Bergstr 66 D-01062 Dresden Germany;

    Tech Univ Dresden Dept Inorgan Chem Bergstr 66 D-01062 Dresden Germany;

    Leibniz IFW Dresden Helmholtzstr 20 D-01069 Dresden Germany;

    Tech Univ Dresden Dept Inorgan Chem Bergstr 66 D-01062 Dresden Germany;

    Tech Univ Dresden Dept Inorgan Chem Bergstr 66 D-01062 Dresden Germany;

    Northwestern Polytech Univ Shaanxi Joint Lab Graphene NPU Sch Mat Sci & Engn State Key Lab Solidificat Proc Xian 710072 Peoples R China;

    Tech Univ Dresden Dept Inorgan Chem Bergstr 66 D-01062 Dresden Germany;

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  • 正文语种 eng
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  • 关键词

    lithium-metal batteries; metal-organic frameworks; metal-organic framework glass; quasi-solid-state electrolytes; ZIF-4;

    机译：锂金属电池;金属有机框架;金属有机框架玻璃;准固态电解质;ZIF-4;

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