An ordered mesoporous silica framework based electrolyte with nanowetted interfaces for solid-state lithium batteries

作者：Han, Lei; Wang, Ziqi^*; Kong, Defei; Yang, Luyi; Yang, Kai; Wang, Zijian; Pan, Feng^*

来源：Journal of Materials Chemistry A, 2018, 6(43): 21280-21286.

DOI：10.1039/c8ta08875f

• IONIC LIQUID ELECTROLYTE
• METAL ANODE
• PERFORMANCE
• INTERPHASE
• TRANSPORT

The practical applications of lithium metal as an anode material are hindered by the uncontrollable growth of lithium dendrites. Herein, an ordered mesoporous silica framework (MCM-41) based solid-state electrolyte (Li-IL@MCM-41 SSE) with nanoconfined ionic liquids is prepared through a post-impregnation method. The as-prepared electrolyte with nanowetted interfaces demonstrates suppression towards lithium dendrites, high thermal stability (up to 350 degrees C) and excellent electrochemical properties, such as high ionic conductivity (3.98 x 10(-4) S cm(-1) at 30 degrees C), a broad electrochemical potential window (up to 5.2 V) and good compatibility with different electroactive materials. The solid-state batteries (SSBs) assembled exhibited excellent cycling performance, delivering capacities of 138 mA h g(-1), 127 mA h g(-1) and 163 mA h g(-1) after 100 cycles at room temperature with LiFePO4, LiCoO2, and LiNi0.8Co0.1Mn0.1O2 cathode materials, respectively. The good battery performance can be ascribed to the effective three-dimensional ion-conducting networks established by the nanowetted interfaces. The aforementioned results exhibit the good prospects of the Li-IL@MCM-41 SSE for application in lithium metal batteries.

• 出版日期2018-11-21
• 单位北京大学深圳研究生院