New Perspectives of Functional Metal Borohydrides

Jakob Grinderslev, Mads Blichfeldt Amdisen, Lasse Najbjerg Skov, Kasper Trans Møller, Lasse Gammelgaard Kristensen, Marek Polanski, Michael Heere, Torben René Jensen*

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

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Abstract

The chemistry of metal borohydrides and their derivatives has expanded signficantly during the past decade involving new compositions, structures, and the diversity of associated properties. Here we provide an overview of interesting results mainly from the past few years, discussed relative to previously published results. A range of new synthesis strategies has been developed to obtain pure samples, which has allowed very detailed structural, physical, and chemical investigations. A short overview of mono- and dimetallic borohydrides is provided, including a description of the complete series of rare-earth metal borohydrides and the recently discovered ammonium metal borohydrides, where the latter has attracted interest due to an extreme hydrogen content. Metal borohydrides appear to be the most promising class of materials to achieve high cationic conductivity of divalent metals, and particularly derivatives of metal borohydrides with neutral molecules show promise as future electrolytes for new types of solid-state batteries. Furthermore, metal borohydrides display a wide range of other properties, including optical, magnetic, semi conduction and possibly superconducting properties, and are also used as a new approach for carbon capture and conversion. The aim of the present review is to highlight new trends in properties and provide an outlook with possible future applications. Here, we focus on the more recently discovered materials.

Original languageEnglish
Article number163014
JournalJournal of Alloys and Compounds
Volume896
Number of pages19
ISSN0925-8388
DOIs
Publication statusPublished - Mar 2022

Keywords

  • Chemical synthesis
  • Energy storage materials
  • Gas-solid reactions
  • Ionic conduction
  • Metal hydrides
  • LITHIUM BOROHYDRIDE
  • SOLID-STATE LI
  • CRYSTAL-STRUCTURES
  • AMORPHOUS MG(BH4)(2)
  • THERMAL-DECOMPOSITION
  • HYDROGEN STORAGE MATERIALS
  • MG-FE-H
  • LI-ION CONDUCTIVITY
  • MAGNESIUM BOROHYDRIDE
  • CARBON-DIOXIDE

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