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Perovskite Membranes with Vertically Aligned Microchannels for All‐Solid‐State Lithium Batteries
Author(s) -
Jiang Zhouyang,
Xie Huiqi,
Wang Suqing,
Song Xiong,
Yao Xiang,
Wang Haihui
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201801433
Subject(s) - materials science , electrolyte , cathode , perovskite (structure) , membrane , chemical engineering , lithium (medication) , electrode , conductivity , fast ion conductor , nanotechnology , chemistry , medicine , engineering , endocrinology , biochemistry
Perovskite‐type solid‐state electrolytes exhibit great potential for the development of all‐solid‐state lithium batteries due to their high Li‐ion conductivity (approaching 10 −3 S cm −1 ), wide potential window, and excellent thermal/chemical stability. However, the large solid–solid interfacial resistance between perovskite electrolytes and electrode materials is still a great challenge that hinders the development of high‐performance all‐solid‐state lithium batteries. In this work, a perovskite‐type Li 0.34 La 0.51 TiO 3 (LLTO) membrane with vertically aligned microchannels is constructed by a phase‐inversion method. The 3D vertically aligned microchannel framework membrane enables more effective Li‐ion transport between the cathode and solid‐state electrolyte than a planar LLTO membrane. A significant decrease in the perovskite/cathode interfacial resistance, from 853 to 133 Ω cm 2 , is observed. It is also demonstrated that full cells utilizing LLTO with vertically aligned microchannels as the electrolyte exhibit a high specific capacity and improved rate performance.