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oai:riubu.ubu.es:10259/113732026-02-18T01:05:42Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

Ammonia‐Annealed TiO2 as a Negative Electrode Material in Li‐Ion Batteries: N Doping or Oxygen Deficiency? Ventosa Arbaizar, Edgar Xia, Wei Klink, Stefan La Mantia, Fabio Mei, Bastian Muhler, Martin Schuhmann, Wolfgang High C rate Lithium-ion battery Nitrogen dopant Oxygen deficiency Titanium dioxide Química Química analítica Chemistry Chemistry, Analytic 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. Financial support by the BMBF in the framework of the project “Elek-trochemie und Mobilität-Kompetenzverbund Nord (KVN; FKZ:13N9973), the DFG SPP1473 (Schu929/11–1) and the NRW program forfunding of the Center of Electrochemical Sciences-CES is gratefully ac-knowledged 2026-02-17T08:58:05Z 2026-02-17T08:58:05Z 2013-10 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 0947-6539 https://hdl.handle.net/10259/11373 10.1002/chem.201302306 1521-3765 eng Chemistry. A European Journal. 2013, V. 19, n. 42, p. 14194-14199 https://doi.org/10.1002/chem.201302306 info:eu-repo/semantics/openAccess application/pdf Wiley https://riubu.ubu.es/bitstream/10259/11373/3/Ventosa-caej_2013.pdf.jpg Hispana TEXT http://rightsstatements.org/vocab/CNE/1.0/ RIUBU. Repositorio Institucional de la Universidad de Burgos https://hdl.handle.net/10259/11373