Ammonia‐Annealed TiO2 as a Negative Electrode Material in Li‐Ion Batteries: N Doping or Oxygen Deficiency?. Issue 42 (11th September 2013)

• Record Type: Journal Article
• Authors: Ventosa, Edgar; Xia, Wei; Klink, Stefan; Mantia, Fabio La; Mei, Bastian; Muhler, Martin; Schuhmann, Wolfgang
• Is Part Of: Chemistry. Volume 19:Issue 42(2013)
• Page Start: 14194
• Page End: 14199
• Publication Date: 2013-09-11
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201302306
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Improving the chemical diffusion of Li ions in anatase TiO₂ is essential to enhance its rate capability as a negative electrode for Li‐ion batteries. Ammonia annealing has been used to improve the rate capability of Li₄Ti₅O₁₂. Similarly, ammonia annealing improves the Li‐ion storage performance of anatase TiO₂ in terms of the stability upon cycling and the C‐rate capability. In order to distinguish whether N doping or oxygen deficiencies, both introduced upon ammonia annealing, are more relevant for the observed improvement, a systematic electrochemical study was performed. The results suggest that the creation of oxygen vacancies upon ammonia annealing is the main reason for the improvement of the stability and C‐rate capability.</p> </abstract>