Zintl phases: Recent developments in thermoelectrics and future outlook

Susan M. Kauzlarich*, Alex Zevalkink, Eric Toberer, Gerald Jeffrey Snyder

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

11 Scopus citations

Abstract

Zintl compounds have recently emerged as promising thermoelectric materials due to their rich chemistry and structural complexity. Zintl compounds are defined as valence precise intermetallic phases in which electropositive cations donate electrons to covalently bonded polyanions. In the search for and development of new thermoelectric materials, the vast array of structures and chemical environments found among Zintl phases is an ideal place to begin. This chapter outlines the principles necessary to select, synthesize, and optimize such phases for thermoelectric applications. In the development of high zT thermoelectric materials, there are two key material requirements: low lattice thermal conductivity and chemically tunable electronic properties. The structural complexity characteristic of Zintl compounds leads to glass-like lattice thermal conductivity, making them ideal thermoelectric materials. This complexity also provides numerous opportunities for tuning electronic properties; while substitution of aliovalent elements yields direct control of the electronic carrier concentration, extensive isovalent substitutions can be used to fine-tune thermal and electronic properties by targeted modification of the bonding environment. By exploiting these principles, several excellent Zintl thermoelectric materials have already been developed, highlighting the future potential of these fascinating and complex materials for thermoelectric applications.

Original languageEnglish (US)
Title of host publicationThermoelectric Materials and Devices
EditorsStephen Beeby, Laurence M. Peter, Iris Nandhakumar, Neil M. White
PublisherRoyal Society of Chemistry
Pages1-26
Number of pages26
Edition17
DOIs
StatePublished - Jan 1 2017

Publication series

NameRSC Energy and Environment Series
Number17
Volume2017-January
ISSN (Print)2044-0774
ISSN (Electronic)2044-0782

ASJC Scopus subject areas

  • Global and Planetary Change
  • Environmental Chemistry
  • Energy(all)

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