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- W2476676054 abstract "In recent reports, doping TiO2 phases into Li4Ti5O12 system is an effective approach to improve the electrochemical performance of Li-titanate batteries, and the explanations of this phenomenon are mainly focused on the functions of TiO2 phases at low current density. In this paper, through the ex-situ X-ray diffraction analysis, it is revealed that the crystal structure of rutile-TiO2 in Li4Ti5O12-TiO2 electrode is very different after cycles at high and low current density. Such results can beneficially help us have a fully understanding of Li-ion storage mechanism in multi-phase electrode. Moreover, three kinds of dual and ternary phase Li4Ti5O12-TiO2 composites with the same morphology of nanosheets are fabricated and their electrochemical performances are compared for the first time. These Li4Ti5O12-TiO2 composites exhibit excellent performance at high current density: Li4Ti5O12-rutile-anatase TiO2 electrode delivers a reversible capacity of about 125 mA h g−1 with a total capacity decreasing less than 5% after 2000 cycles at 30 C. Li4Ti5O12-rutile TiO2 nanosheets electrode tested from 1 to 50 C with 100 cycles for each rate delivers a capacity of 108 mA h g−1 at high rate of 50 C, which is 69.2% of the specific capacity at 1 C." @default.
- W2476676054 created "2016-08-23" @default.
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- W2476676054 date "2016-12-01" @default.
- W2476676054 modified "2023-10-16" @default.
- W2476676054 title "Effects of TiO2 phase on the performance of Li4Ti5O12 anode for lithium-ion batteries" @default.
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- W2476676054 doi "https://doi.org/10.1016/j.jallcom.2016.08.059" @default.
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