4.8 Article

Reactivity-Guided Interface Design in Na Metal Solid-State Batteries

期刊

JOULE
卷 3, 期 4, 页码 1037-1050

出版社

CELL PRESS
DOI: 10.1016/j.joule.2018.12.019

关键词

-

资金

  1. Samsung Advanced Institute of Technology
  2. Joint Center for Energy Storage Research (JCESR), an Energy Innovation Hub - U.S. Department of Energy, Office of Science, and Basic Energy Sciences [3F-31144]
  3. DOE Office of Science [DE-AC02-06CH11357]
  4. Office of Science, Office of Basic Energy Sciences of the US Department of Energy [DE-AC02-05CH11231]

向作者/读者索取更多资源

Solid-state batteries provide substantially increased safety and improved energy density when energy-dense alkali metal anodes are applied. However, most solid-state electrolytes react with alkali metals, causing a continuous increase of the cell impedance. Here, we employ a reactivity-driven strategy to improve the interfacial stability between a Na3SbS4 solid-state electrolyte and sodium metal. First-principles calculations identify a protective hydrate coating for Na3SbS4 that leads to the generation of passivating decomposition products upon contact of the electrolyte with sodium metal. The formation of this protective coating, a newly discovered hydrated phase, is achieved experimentally through exposure of Na3SbS4 to air. The buried interface is characterized using post-operando synchrotron X-ray depth profiling, providing spatially resolved evidence of the multilayered phase distribution in the Na metal symmetric cell consistent with theoretical predictions. We identify hydrates as promising for improving the metal/electrolyte interfacial stability in solid-state batteries and suggest a general strategy of interface design for this purpose.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据