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- W3207524438 abstract "In this article, the sol-gel synthesized β-Li2TiO3, referred to as sg-β-Li2TiO3, exhibits superior electro-chemical performance, compared with the theoretical specific capacities of frequently investigated Titanium based oxides, for example, LiTiO2 (143 mAh g-1), Li4Ti5O12 (175 mAh g-1) and Li2Ti3O7 (198 mAh g-1). It delivers a considerable specific capacity of more than 200 mAh g-1 within 100 cycles and close to 200 mAh g-1 after 200 cycles and preserves coulombic efficiency above 97% for all the cycles. After more than 500 cycles, the reversible specific capacity of sg-β-Li2TiO3 is more than 170 mAh g-1 and a less than 2% capacity degeneration is observed for the followed several hundreds of cycles. DFT calculations and MD simulations show 8 f void mediated diffusion comprise the two dimensional diffusion layer on a-b plane and the neighboring diffusion layers are interconnected by two 8 f voids via a Li2 atom. Low energy barriers and high Li+ activities are observed. Three intermediate phases, corresponding to intercalation level x = 0.5, 0.75 and 0.875 in β-Li2+xTiO3, are identified for the intercalation process with the maximal intercalation level 0.875. Both ex-situ XRD and theoretical calculations reveal low volume change or strain less than 5% in the intercalation process. Also, an insulator-metal transition upon lithiation is observed by the electronic structure analysis." @default.
- W3207524438 created "2021-10-25" @default.
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- W3207524438 date "2022-02-01" @default.
- W3207524438 modified "2023-10-14" @default.
- W3207524438 title "The electro-chemical properties and intercalation mechanism of low strain Li2TiO3 as a high-performance anode material for lithium-ion batteries" @default.
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- W3207524438 doi "https://doi.org/10.1016/j.jallcom.2021.162348" @default.
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