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

• 作者: Gang Zhang Jun Shu Lin Xu Xinyin Cai Wenyuan Zou Lulu Du Song Hu Liqiang Mai
• 来源期刊: 纳微快报（英文版）
• 年，卷（期）: 2021,（7）
• 页码范围: 74-85
• 页数: 12页
• 语种: 英文

摘要

Solid-state electrolyte(SSE)of the sodium-ion battery have attracted tremendous atten-tion in the next generation energy storage materials on account of their wide electrochemical window and thermal stability.However,the high interfacial imped-ance,low ion transference number and complex prepa-ration 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 con-ductivity of 6.60×10-4 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.