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https://hdl.handle.net/2440/132797
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Type: | Journal article |
Title: | Lanthanide doping induced electrochemical enhancement of Na₂Ti₃O₇ anodes for sodium-ion batteries |
Other Titles: | Lanthanide doping induced electrochemical enhancement of Na(2)Ti(3)O(7) anodes for sodium-ion batteries |
Author: | Xia, J. Zhao, H. Pang, W.K. Yin, Z. Zhou, B. He, G. Guo, Z. Du, Y. |
Citation: | Chemical Science, 2018; 9(14):3421-3425 |
Publisher: | Royal Society of Chemistry |
Issue Date: | 2018 |
ISSN: | 2041-6520 2041-6539 |
Statement of Responsibility: | Jiale Xia, Hongyang Zhao, Wei Kong Pang, Zongyou Yin, Bo Zhou, Gang He, Zaiping Guo and Yaping Du |
Abstract: | Na₂Ti₃O₇ is considered as a promising anode material for sodium ion batteries (SIBs) due to its excellent high-rate performance compared with hard carbons. However, the electrochemical performance of Na₂Ti₃O₇ is heavily limited by its low electrical conductivity. In this study, we synthesized a series of lanthanide (Ln = La, Ce, Nd, Sm, Gd, Er, and Yb) doped microsized Na₂Ti₃O₇ anode materials and systematically studied the electrochemical performance. Compared with pristine Na₂Ti₃O₇, all the doped samples show superior electrochemical performance. Especially, the Yb³⁺ doped sample not only delivers a high reversible capacity of 89.4 mA h g⁻¹ at 30C, but also maintains 71.6 mA h g⁻¹ at 5C after 1600 cycles, nearly twice that of pristine Na₂Ti₃O₇. It is found for the first time that the enhancement in doped samples is attributed to the introduction of lanthanides which induces lattice distortion and oxygen vacancies. |
Rights: | This journal is © The Royal Society of Chemistry 2018. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. |
DOI: | 10.1039/c7sc05185a |
Grant ID: | http://purl.org/au-research/grants/arc/FT150100109 http://purl.org/au-research/grants/arc/FT160100251 http://purl.org/au-research/grants/arc/DP170102406 |
Published version: | http://dx.doi.org/10.1039/c7sc05185a |
Appears in Collections: | Chemical Engineering publications |
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hdl_132797.pdf | Published version | 1.84 MB | Adobe PDF | View/Open |
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