Evidence of Intrinsic Pseudocapacitive Lithium Intercalation in Rutile TiNbO<sub>4</sub>
Sang-eun Bak, Woowon Chung, Muhammad A. Abbas, Jin Ho Bang
Abstract
TiNbO4 is a recently discovered Li host material. Unlike most mixed oxides of Ti and Nb, TiNbO4 does not show a phase transformation for Li storage. It stores Li-ions via a purely single-phase reaction. In this work, we show that TiNbO4 stores Li-ions via intercalation pseudocapacitance in both bulk and nanostructured states. The rate performance and capacity of TiNbO4 are independent of nanostructuring, indicating that TiNbO4 stores charges through an intrinsic pseudocapacitance mechanism.
Topics & Concepts
PseudocapacitanceIntercalation (chemistry)RutileMaterials scienceLithium (medication)IonPhase (matter)Chemical engineeringChemical physicsNanotechnologyInorganic chemistryChemistrySupercapacitorPhysical chemistryCapacitanceElectrodeOrganic chemistryEndocrinologyMedicineEngineeringAdvancements in Battery MaterialsSupercapacitor Materials and FabricationAdvanced Battery Materials and Technologies