Premium
On the Existence of LiFeVO 4 – Tales and Imagination
Author(s) -
Clemens Oliver,
Bauer Matthias,
Haberkorn Robert,
Beck Horst Philipp
Publication year - 2011
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201100037
Subject(s) - disproportionation , xanes , extended x ray absorption fine structure , ion , crystallography , coordination number , phase (matter) , chemistry , materials science , analytical chemistry (journal) , physics , absorption spectroscopy , spectral line , catalysis , organic chemistry , optics , astronomy
In this paper, we report investigations on the synthesis of LiFeVO 4 as well as a reinvestigation of recently published research reports. Starting with compounds containing V 4+ and Fe 3+ for synthesis showed to be the best way to realize the desired composition. A single phase material could not be prepared, instead, we find a disproportionation of V 4+ to V 3+ and V 5+ and separation of these ions into two different phases, such as Li 0.5 + Fe (5 z –1)/2 z 3+ V 0.5 z 3+ O 4 and Li (1–0.5 z )/(1– z ) + Fe (1.5–2.5 z )/(1– z ) 3+ V 0.5/(1– z ) 5+ O 4 , with z ≈ 0.45. Additionally, XANES / EXAFS measurements were performed to determine the cation oxidation states and coordination.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom