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https://hdl.handle.net/2440/106680
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Type: | Journal article |
Title: | Ag quantum dots promoted Li₄Ti₅O₁₂/TiO₂ nanosheets with ultrahigh reversible capacity and super rate performance for power lithium-ion batteries |
Other Titles: | Ag quantum dots promoted Li(4)Ti(5)O(12)/TiO(2) nanosheets with ultrahigh reversible capacity and super rate performance for power lithium-ion batteries |
Author: | Ge, H. Cui, L. Zhang, B. Ma, T. Song, X. |
Citation: | Journal of Materials Chemistry A, 2016; 4(43):16886-16895 |
Publisher: | Royal Society of Chemistry |
Issue Date: | 2016 |
ISSN: | 2050-7488 2050-7496 |
Statement of Responsibility: | Hao Ge, Luxia Cui, Bing Zhang, Tian-Yi Ma and Xi-Ming Song |
Abstract: | Spinel Li₄Ti₅O₁₂ (LTO) has been widely studied as a promising anode material due to its outstanding structural stability and remarkable safety. However, the poor electron conductivity and low lithium-ion diffusion coefficient seriously limit its rate capability for the application in power lithium-ion batteries (LIBs). Herein, we demonstrate rationally designed Ag quantum dot (QD) modified LTO/TiO₂ nanosheets (Ag-LTO/TiO₂ NSs) synthesized via a facile hydrothermal process followed by heat treatment, highlighting simultaneously the promotion of electron conductivity and lithium-ion diffusion coefficient. The newly prepared Ag-LTO/TiO₂NSs deliver an ultrahigh reversible capacity of 177 mA h g⁻¹at 0.5C and a superior rate performance of more than 148 mA h g⁻¹ at 30C between 1.0 and 2.5 V. The achieved superior electrochemical performance largely surpasses that of the state-of-the-art LTO-based materials for LIBs. The present work provides a facile yet effective approach to significantly boost the high rate capability of LTO/TiO₂composites. These novel quantum dot modified 2-dimensional (2D) materials will pave the way to a new family of carbon-free anode materials in response to the increasing demands for high-power energy storage. |
Description: | Accepted 5th October 2016 |
Rights: | This journal is © The Royal Society of Chemistry 2016 |
DOI: | 10.1039/c6ta06874j |
Grant ID: | http://purl.org/au-research/grants/arc/DE150101306 http://purl.org/au-research/grants/arc/LP160100927 |
Published version: | http://dx.doi.org/10.1039/c6ta06874j |
Appears in Collections: | Aurora harvest 3 Chemical Engineering publications |
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