Identifying Different States of Lithiationof Li4Ti5O12Spinel by Energy-Dispersive Inelastic X-Ray Scattering (EDIXS) Spectroscopy

J. J. LEANI; J. ROBLEDO; FABIANA OLIVA; H. J. SÁNCHEZ

Conferencia; e-CPM2020 2020 Express Conference on the Physics of Materials and its application in Energy and Environment; 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.