Identifying Different States of Lithiation of Li4Ti5O12 Spinel by Energy-Dispersive Inelastic X-Ray Scattering (EDIXS) Spectroscopy

LEANI, JUAN JOSÉ; ROBLEDO, JOSÉ IGNACIO; CHAUQUE, SUSANA; O. CAMARA; F. OLIVA; SÁNCHEZ, HÉCTOR JORGE

Congreso; Express Conference on the Physics of Materials and its application in Energy and Environment (e-CPM); 2020

ThecompoundLi4Ti5O12(alsoknownasLTO)hasbeeninvestigatedasanodematerialoflithiumionbatteriesforseveralapplicationsasenergystorageforelectricandhybridvehiclesduetoitsexceptionalfeatures[1-3].ThisLTOcompoundhasshownaremarkableLi-ionintercalation/de-intercalationreversibility,demonstratingalsozero-strainvolumechangeduringthecyclingprocess,withtheadditionofanotablesafetyperformance.Furthermore,LTOhasahighvoltageplateauincomparisonwithotheranodematerialcandidates,helpingtoavoidtheformationofmetalliclithium[4].Clearly,adeepknowledgeregardingthebehaviorofthisLTOcompoundisofinterest.Inthiswork,Energy-DispersiveResonantInelasticX-rayScattering(EDIXS)[5]isusedtofulfillthisneed.Inaddition,XANESmeasurementswerecarriedoutascomplementarymethodology.TheresultsshowthatEDIXScandifferentiateLTOchemicalcompounds(lithiatedandde-lithiated)withhighsensitivity,beingareliabletooltoperformchemicalspeciationanalysisonenergystoragematerials.