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Chemical Sodiation of V 2 O 5 by Na 2 S
Author(s) -
Haberkorn Robert,
Bauer Jessica,
Kickelbick Guido
Publication year - 2014
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.201400381
Subject(s) - acetonitrile , phase (matter) , yield (engineering) , chemistry , ball mill , analytical chemistry (journal) , nuclear chemistry , materials science , chromatography , organic chemistry , metallurgy
Chemical sodiation of V 2 O 5 at low temperatures allows to synthesize Na x V 2 O 5 with 0 ≤ x ≤ 1, while classic high temperature syntheses yield in either x ≤ 0.02 (α‐phase) or 0.7 ≤ x (α′‐phase), or other phases (β‐phase, δ‐phase) or mixtures thereof. A suspension of V 2 O 5 in acetonitrile and Na 2 S as sodiation agent were used. The maximum amount of sodiation was obtained by using an excess of Na 2 S, refluxing the acetonitrile during the reaction, and precedent ball milling of the V 2 O 5 . If only low amounts of Na 2 S were used as starting material, a mixture of fractions of Na x V 2 O 5 with different values of x was obtained. All these fractions belong to the α‐ or α′‐phase, space group Pmmn .