Substantially enhanced rate capability of lithium storage in Na₂Ti₆O₁₃ with self-doping and carbon-coating.

ABSTRACT: Na₂Ti₆O₁₃ (NTO) has recently been reported for lithium ion storage and showed very promising results. In this work, we report substantially enhanced rate capability in NTO nanowires by Ti(iii) self-doping and carbon-coating. Ti(iii) doping and carbon coating were found to work in synergy to increase the electrochemical performances of the material. For 300 cycles at 1C (1C = 200 mA g^-1) the charge capacity of the electrode is 206 mA h g^-1, much higher than that (89 mA h g^-1) of the pristine NTO electrode. For 500 cycles at 5C the electrode can still deliver a charge capacity of 180.5 mA h g^-1 with a high coulombic efficiency of 99%. At 20C the capacity of the electrode is 2.6 times that of the pristine NTO. These

SUBMITTER: Liao JY 

PROVIDER: S-EPMC9078603 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature