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https://hdl.handle.net/2440/134076
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Type: | Journal article |
Title: | Growth of lithium lanthanum titanate nanosheets and their application in lithium-ion batteries |
Author: | Lin, X. Wang, H. Du, H. Xiong, X. Qu, B. Guo, Z. Chu, D. |
Citation: | ACS Applied Materials and Interfaces, 2016; 8(2):1486-1492 |
Publisher: | American Chemical Society |
Issue Date: | 2016 |
ISSN: | 1944-8244 1944-8252 |
Statement of Responsibility: | Xi Lin, Hongqiang Wang, Haiwei Du, Xinrun Xiong, Bo Qu, Zaiping Guo, and Dewei Chu |
Abstract: | In this work, lithium-doped lanthanum titanate (LLTO) nanosheets have been prepared by a facile hydrothermal approach. It is found that with the incorporation of lithium ions, the morphology of the product transfers from rectangular nanosheets to irregular nanosheets along with a transition from La₂Ti₂O₇ to Li₀.₅La₀.₅TiO₃. The as-prepared LLTO nanosheets are used to enhance electrochemical performance of the LiCo(1/3)Ni(1/3)Mn(1/3)O₂ (CNM) electrode by forming a higher lithium-ion conductive network. The LiCo(1/3)Ni(1/3)Mn(1/3)O₂-Li₀.₅La₀.₅TiO₃ (CNM-LLTO) electrode shows better a lithium diffusion coefficient of 1.5 × 10⁻¹⁵ cm² s⁻¹, resulting from higher lithium-ion conductivity of LLTO and shorter lithium diffusion path, compared with the lithium diffusion coefficient of CNM electrode (5.44 × 10⁻¹⁶ cm² s⁻¹). Superior reversibility and stability are also found in the CNM-LLTO electrode, which retains a capacity at 198 mAh/g after 100 cycles at a rate of 0.1 C. Therefore, it can be confirmed that the existence of LLTO nanosheets can act as bridges to facilitate the lithium-ion diffusion between the active materials and electrolytes. |
Keywords: | Perovskite oxides; hydrothermal; lithium lanthanum titanate; nanosheets; lithium-ion battery; composite electrode; ionic conductivity |
Rights: | © 2015 American Chemical Society |
DOI: | 10.1021/acsami.5b10877 |
Grant ID: | http://purl.org/au-research/grants/arc/FT140100032 |
Published version: | http://dx.doi.org/10.1021/acsami.5b10877 |
Appears in Collections: | Chemical Engineering publications |
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