Anomalous High Ionic Conductivity of Nanoporous β-Li3PS4

被引：769

作者：

Liu, Zengcai ^{[1
]}

Fu, Wujun ^{[1
]}

Payzant, E. Andrew ^{[1
,2
]}

Yu, Xiang ^{[1
]}

Wu, Zili ^{[1
,3
]}

Dudney, Nancy J. ^{[2
]}

Kiggans, Jim ^{[2
]}

Hong, Kunlun ^{[1
]}

Rondinone, Adam J. ^{[1
]}

Liang, Chengdu ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37830 USA

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37830 USA

[3] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37830 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2013年 / 135卷 / 03期

关键词：

PHASE-TRANSITION; ROOM-TEMPERATURE; ELECTROLYTES; TRANSPORT; SYSTEMS; STORAGE; LI3PS4; CAF2;

D O I：

10.1021/ja3110895

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 beta phase that occurs at elevated temperatures, and (2) the high surface-to-bulk ratio of nanoporous beta-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.

引用

页码：975 / 978

页数：4

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