An improved catalytic effect of nitrogen-doped TiO2 nanofibers for rechargeable Li-O-2 batteries; the role of oxidation states and vacancies on the surface

作者：Agyeman Daniel Adjei^*; Song Kyeongse; Kang Seung Ho; Jo Mi Ru; Cho Eunbi; Kang Yong Mook

来源：Journal of Materials Chemistry A, 2015, 3(45): 22557-22563.

DOI：10.1039/c5ta05426e

This work deals with nitrogen-doped TiO2 nanofibers with increased ionic conductivity and good catalytic activity, as a potential cathode catalyst for lithium-air battery. The electrochemical enhancement with nitrogen-doped TiO2 in comparison with pristine TiO2 could be realized by the changed electronic properties correlated with the evolution of oxygen vacancies altering the surface oxidation state of TiO2. A discharge capacity greater than 11 000 mA h g((carbon))(-1) and a cyclic retention more than 25 cycles were achieved with the corresponding nitrogen-doped TiO2 catalyst.

• 出版日期2015