Coarse-grained reduced Mo Ti1−Nb2O7+ anodes for high-rate lithium-ion batteries
High-volumetric-energy-density lithium-ion batteries require anode material with a suitable redox potential, a small surface area, and facile kinetics at both single-particle and electrode level. Here a family of coarse-grained molybdenum substituted titanium niobium oxides Mo[subscript x]Ti[subscri...
| Main Authors: | , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Elsevier BV
2021
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| Online Access: | https://hdl.handle.net/1721.1/133050 |
| _version_ | 1811088095751176192 |
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| author | Zhao, Lijiang Wang, Shitong Dong, Yanhao Quan, Wei Han, Fei Huang, Yimeng Li, Yutong Liu, Xinghua Li, Mingda Zhang, Zhongtai Zhang, Junying Tang, Zilong Li, Ju |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Zhao, Lijiang Wang, Shitong Dong, Yanhao Quan, Wei Han, Fei Huang, Yimeng Li, Yutong Liu, Xinghua Li, Mingda Zhang, Zhongtai Zhang, Junying Tang, Zilong Li, Ju |
| author_sort | Zhao, Lijiang |
| collection | MIT |
| description | High-volumetric-energy-density lithium-ion batteries require anode material with a suitable redox potential, a small surface area, and facile kinetics at both single-particle and electrode level. Here a family of coarse-grained molybdenum substituted titanium niobium oxides Mo[subscript x]Ti[subscript 1−x]Nb[subscript 2]O[subscript 7+y] (single crystals with 1~2 μm size) underwent hydrogen reduction treatment to improve electronic conduction was synthesized, which is able to stably deliver a capacity of 158.5 mAh g[superscript −1] at 6,000 mA g[superscript −1] (65.2 % retention with respect to its capacity at 100 mA g[superscript −1] ) and 175 mAh g[superscript −1] (73 % capacity retention over 500 cycles) at 2,000 mA g[superscript −1], respectively. Via careful in situ electrochemical characterizations, we identified the kinetic bottleneck that limits their high-rate applications to be mainly ohmic loss at the electrode level (which mostly concerns electron transport in the composite electrodes) rather than non-ohmic loss (which mostly concerns Li+ lattice diffusion within individual particles). Such a kinetic problem was efficiently relieved by simple treatments of Mo substitution and gas-phase reduction, which enable full cells with high electrode density, and high volumetric energy/power densities. Our work highlights the importance of diagnosis, so that modifications could be made specifically to improve full-cell performance. |
| first_indexed | 2024-09-23T13:56:11Z |
| format | Article |
| id | mit-1721.1/133050 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:56:11Z |
| publishDate | 2021 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1330502023-01-03T04:53:08Z Coarse-grained reduced Mo Ti1−Nb2O7+ anodes for high-rate lithium-ion batteries Zhao, Lijiang Wang, Shitong Dong, Yanhao Quan, Wei Han, Fei Huang, Yimeng Li, Yutong Liu, Xinghua Li, Mingda Zhang, Zhongtai Zhang, Junying Tang, Zilong Li, Ju Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Department of Materials Science and Engineering High-volumetric-energy-density lithium-ion batteries require anode material with a suitable redox potential, a small surface area, and facile kinetics at both single-particle and electrode level. Here a family of coarse-grained molybdenum substituted titanium niobium oxides Mo[subscript x]Ti[subscript 1−x]Nb[subscript 2]O[subscript 7+y] (single crystals with 1~2 μm size) underwent hydrogen reduction treatment to improve electronic conduction was synthesized, which is able to stably deliver a capacity of 158.5 mAh g[superscript −1] at 6,000 mA g[superscript −1] (65.2 % retention with respect to its capacity at 100 mA g[superscript −1] ) and 175 mAh g[superscript −1] (73 % capacity retention over 500 cycles) at 2,000 mA g[superscript −1], respectively. Via careful in situ electrochemical characterizations, we identified the kinetic bottleneck that limits their high-rate applications to be mainly ohmic loss at the electrode level (which mostly concerns electron transport in the composite electrodes) rather than non-ohmic loss (which mostly concerns Li+ lattice diffusion within individual particles). Such a kinetic problem was efficiently relieved by simple treatments of Mo substitution and gas-phase reduction, which enable full cells with high electrode density, and high volumetric energy/power densities. Our work highlights the importance of diagnosis, so that modifications could be made specifically to improve full-cell performance. 2021-10-19T16:10:19Z 2021-10-19T16:10:19Z 2020-10 2020-10 2021-10-19T13:57:18Z Article http://purl.org/eprint/type/JournalArticle 2405-8297 https://hdl.handle.net/1721.1/133050 Zhao, Lijiang et al. "Coarse-grained reduced MoxTi1−xNb2O7+y anodes for high-rate lithium-ion batteries." Energy Storage Materials 34 (January 2021): 574-581. © 2020 Elsevier B.V. en http://dx.doi.org/10.1016/J.ENSM.2020.10.016 Energy Storage Materials Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf application/pdf Elsevier BV Prof. Mingda Li |
| spellingShingle | Zhao, Lijiang Wang, Shitong Dong, Yanhao Quan, Wei Han, Fei Huang, Yimeng Li, Yutong Liu, Xinghua Li, Mingda Zhang, Zhongtai Zhang, Junying Tang, Zilong Li, Ju Coarse-grained reduced Mo Ti1−Nb2O7+ anodes for high-rate lithium-ion batteries |
| title | Coarse-grained reduced Mo Ti1−Nb2O7+ anodes for high-rate lithium-ion batteries |
| title_full | Coarse-grained reduced Mo Ti1−Nb2O7+ anodes for high-rate lithium-ion batteries |
| title_fullStr | Coarse-grained reduced Mo Ti1−Nb2O7+ anodes for high-rate lithium-ion batteries |
| title_full_unstemmed | Coarse-grained reduced Mo Ti1−Nb2O7+ anodes for high-rate lithium-ion batteries |
| title_short | Coarse-grained reduced Mo Ti1−Nb2O7+ anodes for high-rate lithium-ion batteries |
| title_sort | coarse grained reduced mo ti1 nb2o7 anodes for high rate lithium ion batteries |
| url | https://hdl.handle.net/1721.1/133050 |
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