期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 142, 期 43, 页码 18645-18651出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c08448
关键词
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资金
- National Key R&D Program on Nano Science & Technology of the MOST [2017YFA0207301]
- National Natural Science Foundation of China [21925110, 21890751, 91745113]
- National Program for Support of Top-notch Young Professionals
- Fundamental Research Funds for the Central Universities [WK2060190084]
- Youth Innovation Promotion Association CAS [2018500]
- National Postdoctoral Program for Innovative Talents [BX20190307, BX20190308]
- Major Program of Development Foundation of Hefei Center for Physical Science and Technology [2016FXZY001]
- Users with Excellence Project of Hefei Science Center CAS [2018HSC-UE002]
- MOST [2018YFA02080603, 2016YFA0200602]
- Anhui Initiative in Quantum Information Technologies [AHY090400]
- Super Computer Center of USTCSCC
- NSFC-MAECI [51861135202]
- SCCAS
Fast ionic conductors are of great importance for novel technologies in high-performance and rechargeable energy storage compo-nents with reliable safety and thermal stability. Here, we demonstrate a new concept of the pillar effect to construct two-dimensional (2D) fast Li+ conductors. Our developed layered LixAg1-xCrS2 (0 < x < 0.4) structure, with larger-radius Ag+ served as pillars to effectively rigidify the interlayer ionic channel, leads to multi-ion concerted migration behavior and thus contributes to low activation energy and fast Li+ diffusion. Consequently, the room-temperature ionic conductivity in (Li-Ag)CrS2 system reaches up to 19.6 mS.cm(-1) for x is 0.31, which is comparable to that of currently best Li-ion conductors. Furthermore, the pillared structure exhibits unique ionic transport that the conductivity decreases as temperature elevated, which can be ascribed to the competition between Li+ and Ag+ migration through tetrahedral viods in 2D channel. We anticipated that pillar effect would pave a new way to explore new catalogue of Li superionic conductors.
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