Intercalation and conversion reactions in Ni0.5TiOPO4 Li-ion battery anode materials
2013 (English)In: Journal of Power Sources, ISSN 0378-7753, Vol. 229, 265-271 p.Article in journal (Refereed) Published
The Ni0.5TiOPO4/C composite Li-ion battery anode material has been prepared by a sol-gel method with a subsequent pyrolysis step for the formation of C-coating. The resulting sub-micronsized particles displayed a narrow particle size distribution and a corresponding high electrochemical activity which, in turn, facilitates in-depth analysis of the electrochemical behavior of the material. It is shown that by limiting the degree of lithiation in the material, the redox potential in subsequent cycles is substantially affected. Ex-situ XRD reveals a gradual evolution of the structure during cycling of the material, with lower crystallinity after the first discharge cycle. By correlating the electrochemical properties with the structural studies, new insights into the electrochemical behavior of the Ni0.5TiOPO4/C anode material are achieved, suggesting a combination of intercalation and conversion reactions.
Place, publisher, year, edition, pages
2013. Vol. 229, 265-271 p.
Anode materials, Conversion reaction, Li-ion batteries, Ni0.5TiOPO4, Sol-gel, Anode material, Conversion reactions, Crystallinities, Electrochemical activities, Electrochemical behaviors, Ex situ, First discharge, In-depth analysis, Lithiation, Redox potentials, Structural studies, XRD, Anodes, Particle size analysis, Redox reactions, Sol-gel process, Sol-gels, Electrochemical cells
IdentifiersURN: urn:nbn:se:uu:diva-194992DOI: 10.1016/j.jpowsour.2012.12.031ISI: 000315605900038OAI: oai:DiVA.org:uu-194992DiVA: diva2:606925