Anomalous High Ionic Conductivity of Nanoporous 尾-Li3PS4

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• 作者：Zengcai Liu ; Wujun Fu ; E. Andrew Payzant ; Xiang Yu ; Zili Wu ; Nancy J. Dudney ; Jim Kiggans ; Kunlun Hong ; Adam J. Rondinone ; Chengdu Liang
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：January 23, 2013
• 年：2013
• 卷：135
• 期：3
• 页码：975-978
• 全文大小：319K
• 年卷期：v.135,no.3(January 23, 2013)
• ISSN：1520-5126

文摘

Lithium-ion-conducting solid electrolytes hold promise for enabling high-energy battery chemistries and circumventing safety issues of conventional lithium batteries. Achieving the combination of high ionic conductivity and a broad electrochemical window in solid electrolytes is a grand challenge for the synthesis of battery materials. Herein we show an enhancement of the room-temperature lithium-ion conductivity by 3 orders of magnitude through the creation of nanostructured Li₃PS₄. This material has a wide electrochemical window (5 V) and superior chemical stability against lithium metal. The nanoporous structure of Li₃PS₄ reconciles two vital effects that enhance the ionic conductivity: (1) the reduction of the dimensions to a nanometer-sized framework stabilizes the high-conduction 尾 phase that occurs at elevated temperatures, and (2) the high surface-to-bulk ratio of nanoporous 尾-Li₃PS₄ promotes surface conduction. Manipulating the ionic conductivity of solid electrolytes has far-reaching implications for materials design and synthesis in a broad range of applications, including batteries, fuel cells, sensors, photovoltaic systems, and so forth.