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Main Title: Ternary transition-metal fluoride precursors for the fluorolytic sol-gel route: new insights into speciation and decomposition
Author(s): Kohl, Julia
Wiedemann, Dennis
Troyanov, Sergej I.
Palamidis, E.
Lerch, Martin
Type: Article
Language Code: en
Abstract: The nanoscaled ternary transition-metal fluorides Li3MF6 (M = V, Fe, Mn) and Li2NiF4 are promising candidates for cathode materials in high-voltage lithium-ion batteries. The fluorolytic route to these compounds relies on thermal decomposition of a hitherto uncharacterised precursor mixture produced from acetylacetonates and hydrofluoric acid. By addition of pyridine, different cationic, electroneutral and anionic complexes containing the motifs [MFn]((3-n)+) (n = 0-4) have been trapped and characterised by single-crystal X-ray diffraction and IR spectroscopy. Based on the results, a model of successive and incomplete fluorination is proposed for the speciation and formation of the precursor. The decomposition of the latter has been monitored via thermogravimetry (TG) and differential scanning calorimetry (DSC).
Issue Date: 2015
Date Available: 13-Sep-2016
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Journal Title: Dalton transactions : a journal of inorganic chemistry, including bioinorganic, organometallic, and solid-state chemistry / Royal Society of Chemistry
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 44
Issue: 29
Publisher DOI: 10.1039/c5dt01748c
Page Start: 13272
Page End: 13281
EISSN: 1477-9234
ISSN: 1477-9226
Appears in Collections:FG Anorganische Chemie - Festkörper- und Materialchemie » Publications

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