Lithiation of V₂O₃(SO₄)₂ – a flexible insertion host

Abstract

Materials displaying strong capability for lithium insertion without a great deal of change in unit cell size on cycling are of considerable importance in electrochemical applications. Here, we present V2O3(SO4)2...

Eldfellite-type cathode material, NaV(SO4)2, for Na-ion batteries

“…23 The Rietveld-refined parameters were satisfactory, with R wp = 6.16%, R p = 4.63%, and S = 1.29. However, ∼3 wt% of V 2 O 3 (SO 4 ) 2 was confirmed as a sub-phase material; this material has been reported to be lithiated between 1.95 and 4.20 V. 43 The crystal structure was obtained from the Rietveld refinement results (Fig. 2b).…”

Advancements in cathode materials for potassium-ion batteries: current landscape, obstacles, and prospects

“…17d) 199,200 has brought to light a suite of novel vanadium-based polyanion cathode materials, exemplified by compounds like K 2 VO(SO 4 ) 2 , 201 KV(SO 4 ) 2 202 and V 2 O 3 (SO 4 ) 2 . 203 These materials exhibit noteworthy attributes, including high voltages (up to 4 V) and high theoretical capacities, opening vistas for further investigation. The lability of the polyanion moiety also contributes to the polymorphism exhibited by polyanionic compounds such as KFeSO 4 F 17 and K 2 CuP 2 O 7 , 204,205 leading to a rich variety of crystal structures with distinct electrochemical performance.…”