TY  - JOUR
TI  - Synergistic storage of lithium ions in defective anatase/rutile TiO2 for high-rate batteries
EP  - 449
SP  - 441
AV  - public
VL  - 22
Y1  - 2019/11//
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
ID  - discovery10111933
N2  - Fabrication of heterostructured materials is a strategy to boost the charge-transfer kinetics and the performance of high-rate lithium storage. Here, a facile, low-temperature method for the synthesis of high-area TiO2 nanospheres containing both anatase and rutile phases is described. The as-prepared materials contain a high concentration of oxygen vacancies facilitating electron conduction in the anatase phase and theoretical calculations provide evidence of a low energy barrier for Li+ transport in the rutile phase. The synergy between the two phases renders the shared conduction of electrons through anatase and Li+ ions via rutile at high-current rates, leading to the anodes that outperform the alternate TiO2 systems when the combination of capacity at high current densities and cycle stability are considered, displaying a capacity of 95.4?mAh g?1 at 10?A?g?1 and a 97.2% retention of capacity over 500 cycles at 1?A?g?1.
UR  - https://doi.org/10.1016/j.ensm.2019.07.025
PB  - ELSEVIER
JF  - Energy Storage Materials
KW  - anatase and rutile TiO2; oxygen vacancy; lithium storage; synergistic effect
A1  - Song, W
A1  - Jiang, Q
A1  - Xie, X
A1  - Brookfield, A
A1  - McInnes, EJL
A1  - Shearing, PR
A1  - Brett, DJL
A1  - Xie, F
A1  - Riley, DJ
ER  -