期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 43, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202104300
关键词
lithium-metal batteries; metal-organic frameworks; metal-organic framework glass; quasi-solid-state electrolytes; ZIF-4
类别
资金
- National Natural Science Foundation of China [51972270]
- China Scholarship Council
- Alexander von Humboldt Foundation
- DFG [KA 1698/27-1]
- BMBF excellence center KaSiLi
Utilizing ZIF-4 glass as quasi-solid-state electrolytes (QSSEs), this study achieved high ion conductivity and outstanding battery performance, showcasing potential for practical quasi-solid-state batteries in the future.
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据