Electrochemical Properties of Electrodes Derived from NaTi3O6OH•2H2O in Sodium and Lithium Cells

TitleElectrochemical Properties of Electrodes Derived from NaTi3O6OH•2H2O in Sodium and Lithium Cells
Publication TypeJournal Article
Year of Publication2015
AuthorsD. Seshadri, M. Shirpour, Marca M Doeff
JournalJournal of the Electrochemical Society
Volume162
Issue1
PaginationA52-A59
Date Published01/2015
ISBN Number0013-46511945-7111
Abstract

<p>Materials derived from the layered compound NaTi<sub>3</sub>O<sub>6</sub>OH<strong>·</strong>2H<sub>2</sub>O, also known as “sodium nonatitanate” or NNT, have recently been found to undergo reversible sodium or lithium intercalation processes at very low potentials. While practical discharge capacities in lithium cells can be above 200 mAh/g, making them of interest for high-energy applications, the presence of mobile sodium in the materials complicates the cycling behavior. A simple ion-exchange process prior to incorporation in electrochemical cells removes all sodium ions, producing the lithiated form of the material. The lithiated material (LNT) performs similarly to NNT in lithium cells, although coulombic inefficiencies are somewhat higher. A comparison is made between the behavior of NNT in sodium cells and that of NNT and the lithiated analog in lithium cells.</p>

DOI10.1149/2.0391501jes