期刊
SCIENCE
卷 370, 期 6516, 页码 596-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abb9704
关键词
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资金
- National Natural Science Foundation of China [51325205, 51290273, 51521091, 51972312]
- Key Research Program of Frontier Sciences of the Chinese Academy of Sciences [ZDBS-LY-JSC027]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB30000000]
- National Key R&D Program of the Ministry of Science and Technology of China [2016YFA0200101]
- LiaoNing Revitalization Talents Program [XLYC1808013]
- Program for Guangdong Introducing Innovative and Enterpreneurial Teams
- Development and Reform Commission of Shenzhen Municipality for the development of the Low-Dimensional Materials and Devices discipline
Proton transport in nanochannels under humid conditions is crucial for the application in energy storage and conversion. However, existing materials, including Nafion, suffer from limited conductivity of up to 0.2 siemens per centimeter. We report a class of membranes assembled with two-dimensional transition-metal phosphorus trichalcogenide nanosheets, in which the transition-metal vacancies enable exceptionally high ion conductivity. A Cd0.85PS3Li0.15H0.15 membrane exhibits a proton conduction dominant conductivity of similar to 0.95 siemens per centimeter at 90 degrees Celsius and 98% relative humidity. This performance mainly originates from the abundant proton donor centers, easy proton desorption, and excellent hydration of the membranes induced by cadmium vacancies. We also observed superhigh lithium ion conductivity in Cd0.5PS3Li0.3 and Mn0.77PS3Li0.46 membranes.
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