Ak. Padhi et al., TUNING THE POSITION OF THE REDOX COUPLES IN MATERIALS WITH NASICON STRUCTURE BY ANIONIC SUBSTITUTION, Journal of the Electrochemical Society, 145(5), 1998, pp. 1518-1520
Citations number
14
Categorie Soggetti
Electrochemistry,"Materials Science, Coatings & Films
Previous studies on insertion of lithium into rhombohedral forms of Fe
-2(SO4)(3) and Li3Fe2(PO4)(3) have determined the position of the Fe3/Fe2+ redox couple to be at 3.6 and 2.8 eV, respectively, below the Fe
rmi level of lithium. Lithium insertion into rhombohedral LiFe2(SO4)(2
)(PO4) with NASICON framework exposes the Fe3+/Fe2+ redox couple at 3.
3-3.4 eV below the Fermi energy of lithium. Unlike Fe-2(SO4)(3), the i
nsertion of lithium into the structure of LiFe2(SO4)(2)(PO4) is accomp
lished as a single-phase solid solution, which makes it attractive as
an electrode material for rechargeable lithium batteries.