Charge transfer from perovskite oxide nanosheets to N-doped carbon nanotubes to promote enhanced performance of a zinc–air battery
Rahul Majee, Surajit Mondal, Sayan Bhattacharyya
Abstract
Room temperature engineered spatially connected p-type double perovskite oxide (BaPrMn1.75Co0.25O5+δ, BPMC) nanosheets (NSs) with n-type nitrogen-doped multi-walled carbon nanotubes (NCNTs) show significant enhancement in bifunctional oxygen electrocatalytic activity. The optimization of the donor level by charge transfer from the perovskite to NCNTs is demonstrated to be a prodigious approach to facilitate redox oxygen activation. A proof-of-concept rechargeable zinc-air battery (ZAB) with BPMC containing a 10 wt% NCNT (BPMC/NCNT-10) cathode demonstrates the highest specific discharge capacity of 789.2 mA h gZn-1 and cyclic stability for 85 h at a current density of 5 mA cm-2.
Topics & Concepts
BifunctionalCarbon nanotubePerovskite (structure)Battery (electricity)Materials scienceZincCathodeDopingOxideChemical engineeringCarbon fibersNanotechnologyChemistryOptoelectronicsCatalysisComposite materialMetallurgyComposite numberOrganic chemistryEngineeringPhysicsPhysical chemistryPower (physics)Quantum mechanicsAdvanced battery technologies researchElectrocatalysts for Energy ConversionPerovskite Materials and Applications