TUNING THE POSITION OF THE REDOX COUPLES IN MATERIALS WITH NASICON STRUCTURE BY ANIONIC SUBSTITUTION

Authors
PADHI AK MANIVANNAN V GOODENOUGH JB
Citation
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
Journal title
Journal of the Electrochemical Society → ACNP
ISSN journal
00134651
Volume
145
Issue
5
Year of publication
1998
Pages
1518 - 1520
Database
ISI
SICI code
0013-4651(1998)145:5<1518:TTPOTR>2.0.ZU;2-L
Abstract
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.