Sol-gel synthesis of aliovalent vanadium-doped LiNi0.5Mn1.5O4 cathodes with excellent performance at high temperatures
Extraordinary performance at elevated temperature is achieved for high-voltage spinel-phase LiNi0.5Mn1.5O4 cathodes prepared using an adipic-acid-assisted sol–gel technique and doped with vanadium. V-substitution in the Li sites (Wykoff position 8a) is confirmed by V K-edge X-ray absorption spectros...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2014
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| Online Access: | https://hdl.handle.net/10356/106500 http://hdl.handle.net/10220/19726 |
| _version_ | 1811679904865976320 |
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| author | Kang, Kisuk Kim, Min Chul Nam, Kyung-Wan Aravindan, Vanchiappan Kim, Woo-Seong Yang, Xiao-Qing Kim, Hyungsub Hu, Enyuan Lee, Yun-Sung |
| author2 | Energy Research Institute @ NTU (ERI@N) |
| author_facet | Energy Research Institute @ NTU (ERI@N) Kang, Kisuk Kim, Min Chul Nam, Kyung-Wan Aravindan, Vanchiappan Kim, Woo-Seong Yang, Xiao-Qing Kim, Hyungsub Hu, Enyuan Lee, Yun-Sung |
| author_sort | Kang, Kisuk |
| collection | NTU |
| description | Extraordinary performance at elevated temperature is achieved for high-voltage spinel-phase LiNi0.5Mn1.5O4 cathodes prepared using an adipic-acid-assisted sol–gel technique and doped with vanadium. V-substitution in the Li sites (Wykoff position 8a) is confirmed by V K-edge X-ray absorption spectroscopy and Rietveld refinement (Li0.995V0.005Ni0.5Mn1.5O4). V-doped LiNi0.5Mn1.5O4 delivered a reversible capacity of approximately 130 and 142 mAh g−1 at ambient and elevated temperature conditions, respectively. Furthermore, the Li0.995V0.005Ni0.5Mn1.5O4 phase rendered approximately 94 % and 84 % of initial capacity compared to approximately 85 % and 3 % for the LiNi0.5Mn1.5O4 phase after 100 cycles in ambient and elevated temperature conditions, respectively. The enhancements are mainly because of the suppression of Mn dissolution and unwanted side reaction with electrolyte counterpart, and to the increase in conductivity, improving the electrochemical profiles for the V-doped phase. |
| first_indexed | 2024-10-01T03:16:34Z |
| format | Journal Article |
| id | ntu-10356/106500 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:16:34Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1065002021-01-14T08:32:07Z Sol-gel synthesis of aliovalent vanadium-doped LiNi0.5Mn1.5O4 cathodes with excellent performance at high temperatures Kang, Kisuk Kim, Min Chul Nam, Kyung-Wan Aravindan, Vanchiappan Kim, Woo-Seong Yang, Xiao-Qing Kim, Hyungsub Hu, Enyuan Lee, Yun-Sung Energy Research Institute @ NTU (ERI@N) DRNTU::Science::Chemistry::Inorganic chemistry::Synthesis Extraordinary performance at elevated temperature is achieved for high-voltage spinel-phase LiNi0.5Mn1.5O4 cathodes prepared using an adipic-acid-assisted sol–gel technique and doped with vanadium. V-substitution in the Li sites (Wykoff position 8a) is confirmed by V K-edge X-ray absorption spectroscopy and Rietveld refinement (Li0.995V0.005Ni0.5Mn1.5O4). V-doped LiNi0.5Mn1.5O4 delivered a reversible capacity of approximately 130 and 142 mAh g−1 at ambient and elevated temperature conditions, respectively. Furthermore, the Li0.995V0.005Ni0.5Mn1.5O4 phase rendered approximately 94 % and 84 % of initial capacity compared to approximately 85 % and 3 % for the LiNi0.5Mn1.5O4 phase after 100 cycles in ambient and elevated temperature conditions, respectively. The enhancements are mainly because of the suppression of Mn dissolution and unwanted side reaction with electrolyte counterpart, and to the increase in conductivity, improving the electrochemical profiles for the V-doped phase. 2014-06-13T01:48:35Z 2019-12-06T22:13:03Z 2014-06-13T01:48:35Z 2019-12-06T22:13:03Z 2014 2014 Journal Article Kim, M. C., Nam, K.-W., Hu, E., Yang, X.-Q., Kim, H., Kang, K., et al. (2014). Sol-Gel Synthesis of Aliovalent Vanadium-Doped LiNi 0.5 Mn 1.5 O 4 Cathodes with Excellent Performance at High Temperatures . ChemSusChem, 7(3), 829-834. 1864-5631 https://hdl.handle.net/10356/106500 http://hdl.handle.net/10220/19726 10.1002/cssc.201301037 en ChemSusChem © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| spellingShingle | DRNTU::Science::Chemistry::Inorganic chemistry::Synthesis Kang, Kisuk Kim, Min Chul Nam, Kyung-Wan Aravindan, Vanchiappan Kim, Woo-Seong Yang, Xiao-Qing Kim, Hyungsub Hu, Enyuan Lee, Yun-Sung Sol-gel synthesis of aliovalent vanadium-doped LiNi0.5Mn1.5O4 cathodes with excellent performance at high temperatures |
| title | Sol-gel synthesis of aliovalent vanadium-doped LiNi0.5Mn1.5O4 cathodes with excellent performance at high temperatures |
| title_full | Sol-gel synthesis of aliovalent vanadium-doped LiNi0.5Mn1.5O4 cathodes with excellent performance at high temperatures |
| title_fullStr | Sol-gel synthesis of aliovalent vanadium-doped LiNi0.5Mn1.5O4 cathodes with excellent performance at high temperatures |
| title_full_unstemmed | Sol-gel synthesis of aliovalent vanadium-doped LiNi0.5Mn1.5O4 cathodes with excellent performance at high temperatures |
| title_short | Sol-gel synthesis of aliovalent vanadium-doped LiNi0.5Mn1.5O4 cathodes with excellent performance at high temperatures |
| title_sort | sol gel synthesis of aliovalent vanadium doped lini0 5mn1 5o4 cathodes with excellent performance at high temperatures |
| topic | DRNTU::Science::Chemistry::Inorganic chemistry::Synthesis |
| url | https://hdl.handle.net/10356/106500 http://hdl.handle.net/10220/19726 |
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