cm6b02759_si_001.pdf (1.58 MB)
A2VO(SO4)2 (A = Li, Na) as Electrodes for Li-Ion and Na-Ion Batteries
journal contribution
posted on 2016-08-30, 00:00 authored by Meiling Sun, Gwenaëlle Rousse, Matthieu Saubanère, Marie-Liesse Doublet, Daniel Dalla Corte, Jean-Marie TarasconWe herein report
the synthesis, crystal structure, and electrochemical
performances of a new Li-based vanadium oxysulfate phase, Li2VO(SO4)2, whose structure is built on vanadyl-containing
VO5 square-based pyramids and SO4 groups linked
by vertices to form layers. Li2VO(SO4)2 presents a redox activity at 4.7 V vs Li+/Li0 with a reversible capacity of 50 mA·h/g, while the chemically
similar but structurally different Na2VO(SO4)2 delivers a capacity of 60 mA h/g at 4.5 V vs Na+/Na0. Density functional theory calculations are
also performed to rationalize our findings in terms of redox activity
and phase stability.