Ion-pre intercalation of hydrated vanadium oxide cathode by K+ and its performance in Lithium-ion Battery

Abstract

Layered hydrated vanadium oxides have a high theoretical capacity and low cost. Although its performance in lithium batteries has not yet been documented, it has promising futures in cathode materials for lithium-ion batteries. This paper describes a technique to produce distinctive hydrated vanadates by adding K+ to hydrated vanadium pentoxide (V2O5 nH2O, VOH). A new VOH phase with quicker ion diffusion kinetics and initial capacity is created when K+ is added. Its longer-term cycle stability still has to be enhanced, though. This work primarily documents the performance and structural modifications made to VOH after K+ integration. KVOH outperforms other batteries by displaying an impressive capacity of 316 mAh g1 at 0.2C and maintaining 227 138mAh g1 at 5C. While VOH showed a capacity of 157mAh/g at 0.2C and 38mAh/g at 5C.