There are many areas of science where progress is materials limited. The synthesis and identification of new compounds that can lead to enhancements in existing technologies, or serve as the basis of revolutionary new technologies, is essential for developing new and improved technologies. This seminar will outline the synthesis and properties of new compounds employing the Zintl concept. Zintl phases are named in recognition of Eduard Zintl a German chemist who first studied a subgroup of intermetallics prepared with electropositive metals combined with main group metalloids in the 1930s. Unlike intermetallic compounds where metallic bonding is the norm, Zintl phases exhibit both ionic and covalent bonding and are typically semiconductors. As we advanced in our understanding of structure-property relationships in Zintl phases, including expanding the elements employed to include some rare earths and transition metals, we postulated that some of these compounds should have applications towards thermoelectrics, materials that can convert a temperature gradient into electricity. I will provide context for the strength and innovation of Zintl ideas and highlight an investigation of a Zintl phase which has promising thermoelectric properties in the context of important structural and electronic design.

Advancement of Zintl phases from curiosities to impactful materials

ACS Spring 2022

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