4.7 Article

Pancake-Like MOF Solid-State Electrolytes with Fast Ion Migration for High-Performance Sodium Battery

期刊

NANO-MICRO LETTERS
卷 13, 期 1, 页码 -

出版社

SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-021-00628-0

关键词

Metal-organic Frameworks; Sodium-ion Battery; Solid-like Electrolyte; Interface Contact

资金

  1. National Natural Science Foundation of China [51802239]
  2. National Key Research and Development Program of China [2020YFA0715000, 2019YFA0704902]
  3. Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHT2020-005, XHT2020-003]
  4. Natural Science Foundation of Hubei Province [2019CFA001]
  5. Fundamental Research Funds for the Central Universities [2020III011GX, 2020IVB057, 2019IVB054, 2019III062JL]
  6. National Innovation and Entrepreneurship Training Program for College Students [202010497080]

向作者/读者索取更多资源

A pancake-like morphology solid-like electrolyte with high ionic conductivity was obtained by combining metal-organic framework with liquid electrolyte, showing good compatibility with sodium metal. The study also revealed the ion restriction effect of MOF's apertures size and special functional groups, leading to an increase in ion transference number. The designed solid-like electrolyte in this work is crucial for achieving fast ion migration in high-performance sodium-ion batteries.
HighlightsA pancake-like morphology solid-like eletrolyte of sodium battery with high ionic conductivity (6.60x10-4 S cm-1) was obtained by simple hydrothermal method.Solid-like electrolyte with pancake-like morphology showed good interface contact and excellent compatibility (stable cycle over 500 h at 0.6 mA cm-2) with sodium metal.Provides possible repulsive force explanation for the restriction of ion transport by MOF. AbstractSolid-state electrolyte (SSE) of the sodium-ion battery have attracted tremendous attention in the next generation energy storage materials on account of their wide electrochemical window and thermal stability. However, the high interfacial impedance, low ion transference number and complex preparation process restrict the application of SSE. Herein, inspired by the excellent sieving function and high specific surface area of red blood cells, we obtained a solid-like electrolyte (SLE) based on the combination of the pancake-like metal-organic framework (MOF) with liquid electrolyte, possessing a high ionic conductivity of 6.60x10(-4) S cm(-1), and excellent sodium metal compatibility. In addition, we investigated the ion restriction effect of MOF's apertures size and special functional groups, and the ion transference number increased from 0.16 to 0.33. Finally, the assembled Na0.44MnO2//SLE//Na full batteries showed no obvious capacity decrease after 160 cycles. This material design of SLE in our work is an important key to obtain fast ion migration SLE for high-performance sodium-ion batteries.

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