Controlling vacancies in chalcogenides as energy harvesting materials

Guowei Li

Research output: ThesisThesis fully internal (DIV)

2683 Downloads (Pure)

Abstract

Recent years witnessed fruitful results on tailoring properties and application performance, especially in the field of clean energy storage and harvesting materials. Defects, especially elemental vacancies, exist universally and are inevitable in materials. Due to the difficulties to precisely map vacancy distributions and concentrations, their influence on properties is often underestimated. Moreover, in comparison with other strategies, vacancy engineering does not need to introduce impurities. Thus, the problem of lattice distortions, second phase formation, which is often detrimental to material performance, can be avoided this way. Thus, the study of the effect of vacancies is important not only in terms of fundamental scientific research, but also to limit global warming. In this thesis, we studied the influence of elemental vacancies on the magnetism, electrical transport, and band structures in several metal chalcogenides. By creating vacancies in the investigated materials, one can tailor the metal-insulator transitions, electronic structures, and introduction of magnetism to non-magnetic materials. With these strategies in mind, we can design and synthesize advanced functional materials as active electrode materials of lithium or sodium ion batteries, catalysts for water splitting and hydrogen evolution, as well as for next generation thermoelectric devices.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • University of Groningen
Supervisors/Advisors
  • Palstra, Thomas, Supervisor
  • de Groot, Robert, Supervisor
  • Blake, Graeme, Co-supervisor
Award date7-Nov-2016
Place of Publication[Groningen]
Publisher
Print ISBNs978-90-367-9263-9
Electronic ISBNs978-90-367-9262-2
Publication statusPublished - 2016

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