期刊
MATERIALS LETTERS
卷 211, 期 -, 页码 254-257出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.10.019
关键词
Li-ion battery; Anode; De-alloying; TiO2/Fe2O3 composite; Nanocomposites; Energy storage and conversion
资金
- China Postdoctoral Science Foundation [2016M600190]
- National Natural Science Foundation of China [51671077, 21406052]
- Natural Science Foundation of Hebei Province, China [E2015202081]
- Program for the Outstanding Young Talents of Hebei Province [BJ2014010]
- Ministry of Human Resources and Social Security of China [CG2015003002]
TiO2 anode presents a stable cycling performance but relatively low theoretical capacity, which has hindered its applications in high-performance Li-ion batteries (LIBs). For improving the Li storage properties, novel TiO2/Fe2O3 composite with a porous slice on slice structure was prepared via a facile de-alloying method. The composite delivers a reversible capacity of 838.8 mAh g(-1) after 400 cycles at a current density of 200 mA g(-1) and maintaining a discharge capacity of 339 mAh g(-1) even at 2 A g(-1). The improved Li storage property could be ascribed to the synergistic effects of the two active materials. Especially, the reduction products of Fe-0 at the interface between TiO2 and Fe2O3 can facilitate the reversibility of reactions and further result in a high reversible capacity. (C) 2017 Elsevier B.V. All rights reserved.
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