Electrochemical Investigation of Lithium Intercalation in MOCVD Derived Nanostructured Anatase/Rutile TiO2

Autor:	Magdalena Graczyk-Zajac, Ralf Riedel, M. Sacilotti, Denis Chaumont, Ana Maria Lazar
Rok vydání:	2011
Předmět:	Anatase chemistry.chemical_compound Materials science chemistry Rutile Inorganic chemistry Titanium dioxide chemistry.chemical_element Lithium Chemical vapor deposition Metalorganic vapour phase epitaxy Electrochemistry Microstructure
Zdroj:	ECS Transactions. 35:207-213
ISSN:	1938-6737 1938-5862
Popis:	In this paper we report on the lithium reversible storage in titanium dioxide (TiO2) prepared by metal-organic chemical vapor deposition (MOCVD). Electrochemical properties in terms of lithium reversible insertion depend on the deposited microstructure. For thick films deposited on silicon wafer electrochemical activity of the anatase type of TiO2 is registered in the potential range 1.8-2.1 V vs. Li. For thinner films the intercalation reaction takes place in two potential ranges: 1.8-2.1 V vs. Li and below 1.4 V vs. Li. The second electroactivity range is attributed to lithium insertion into rutile. We found that the decrease of the lower potential limit (0.5 V instead of commonly used 1 V) leads to an increase of the recovered capacity. In consequence the investigated MOCVD TiO2 demonstrates high reversible capacity of about 300 mAhg-1.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::eb6b7cddd01dc3d237a71259a943247e https://doi.org/10.1149/1.3654219 Zobrazit plný text záznamu