Understanding memory effects in Li-ion batteries: evidence of a kinetic origin in TiO2 upon hydrogen annealing

E Ventosa; T Löffler; F La Mantia; W Schuhmann

doi:10.1039/c6cc06070f

Understanding memory effects in Li-ion batteries: evidence of a kinetic origin in TiO₂ upon hydrogen annealing

Chem Commun (Camb). 2016 Sep 20;52(77):11524-11526. doi: 10.1039/c6cc06070f.

Authors

E Ventosa¹, T Löffler¹, F La Mantia², W Schuhmann¹

Affiliations

¹ Analytical Chemistry - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, D-44780 Bochum, Germany. edgar.ventosa@rub.de.
² Semiconductor and Energy Conversion - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätstr. 150, D-44780 Bochum, Germany and Energiespeicher- und Energiewandlersysteme, Universität Bremen, Wiener Str. 12, 28359 Bremen, Germany.

PMID: 27722464
DOI: 10.1039/c6cc06070f

Abstract

Memory effects in Li-ion battery materials have been explained on the basis of the thermodynamics of many-particles body, however the role of the (de-)intercalation kinetics is not yet clear. We demonstrate that kinetic aspects, specifically Li-ion mobility, are determining the magnitude of the memory effect in TiO₂ by studying samples with different levels of oxygen vacancies.