Functional material "Ionic liquid-supported MIL-101(Fe)" to enhance composite solid electrolyte for lithium metal batteries

被引：6

作者：

Wei, Lai ^{[1
]}

Xu, Xin ^{[1
]}

Xi, Kang ^{[1
]}

Zhang, Linghao ^{[1
]}

Cheng, Xiang ^{[1
]}

Lan, Yuelang ^{[1
]}

Jiang, Sen ^{[1
]}

Lei, Yue ^{[1
]}

Yin, Junying ^{[2
]}

Wu, Haihua ^{[1
]}

Gao, Yunfang ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Zhejiang, Peoples R China

[2] Binzhou Univ, Coll Chem Engn & Safety, Binzhou 256603, Shandong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 968卷 / 968期

关键词：

Lithium metal battery; Metal-organic framework; Ionic liquids; Composite electrolyte; POLYMER ELECTROLYTE; ORGANIC FRAMEWORK; CONDUCTIVITY; TRANSPORT; FILM;

D O I：

10.1016/j.jallcom.2023.172063

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Because of poor ionic conductivity, insufficient interfacial compatibility and other issues, all-solid-state lithium metal batteries (ASSLMBs) are difficult to commercialize. Here, a sort of composite solid-state polymer electrolytes (CSPEs) is prepared by compounding multifunctional fillers with polyethylene oxide (PEO), and the multifunctional filler is obtained by absorbing the ionic liquids (ILs) into the iron-containing metal-organic frameworks (MOFs). The porosity of MOFs can improve the path for Li+ transport and accelerate the Li+ transport after adsorbing ILs. This strategy endows the prepared CSPEs with high ionic conductivity of 8.46 x 10-4 S cm-1 at 60 degrees C and wide electrochemical window (5.2 V). In addition, the transference number of the CSPEs is increased to 0.54. After 250 cycles, the assembled LiFePO4/CSPE/Li battery has a discharge-specific capacity of 139.1 mAh g-1 and a capacity retention of 93.3% at 0.5 C under 60 degrees C. This work reveals a feasible strategy in constructing high-performance solid-state LMBs, as well as an important complement for material and structure development in the field of energy storage.

引用

页数：9