Enhanced Lithium Storage in Micrometer‐Scale Tungsten Bronze Mo3Nb2O14 by Molybdenum Reduction and Oxygen Deficiency
Abstract Tungsten bronze transitional metal oxides are potential candidate anode material for lithium‐ion batteries (LIBs) owing to their open multichannel frame structure facilitating lithium transport and storage. Herein, the molybdenum reduction and oxygen deficiency are enhanced in micrometer‐sc...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2021-12-01
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| Series: | Advanced Materials Interfaces |
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| Online Access: | https://doi.org/10.1002/admi.202101016 |
| _version_ | 1797763835201847296 |
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| author | Xue Fang Chao Rong Lijia Zhou Congling Yin Lunhua He Hongbo Cui Fengqi Lu Xiaojun Kuang |
| author_facet | Xue Fang Chao Rong Lijia Zhou Congling Yin Lunhua He Hongbo Cui Fengqi Lu Xiaojun Kuang |
| author_sort | Xue Fang |
| collection | DOAJ |
| description | Abstract Tungsten bronze transitional metal oxides are potential candidate anode material for lithium‐ion batteries (LIBs) owing to their open multichannel frame structure facilitating lithium transport and storage. Herein, the molybdenum reduction and oxygen deficiency are enhanced in micrometer‐scale Mo5O14‐type tungsten bronze structure Mo3Nb2O14−x (V‐MNO) that is prepared by a solid‐state reaction in vacuum. Neutron powder diffraction data indicate that oxygen vacancies are located at both three‐coordinated (µ3) oxygen sites around filled pentagonal rings and normally two‐coordinated (µ2) oxygen sites. As anode material for LIBs, benefiting from the increased Mo reduction, facilitating the electronic transport and oxygen vacancies without strong site preferences, widening the intratunnel, and opening up the intertunnel migration paths for lithium ions, V‐MNO displays enhanced electrochemical properties with an initial discharge capacity of ≈322 mAh g−1, a charge capacity of ≈274 mAh g−1, and a reversible capacity of ≈147.2 mAh g−1 (at 400 mA g−1) after 200 cycles. The LiCoO2//V‐MNO full cell shows a discharge capacity of 145.4 mAh g−1 after 100 cycles at 100 mA g−1. These results underline significance of controlling defect chemistry on the cationic reduction and oxygen vacancies in micrometer‐scale tungsten bronze transition metal oxides as an effective strategy for enhancing their storage performance as anode materials. |
| first_indexed | 2024-03-12T19:48:00Z |
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| id | doaj.art-3eb5ca0860e04f2b9dde001bd6e5875e |
| institution | Directory Open Access Journal |
| issn | 2196-7350 |
| language | English |
| last_indexed | 2024-03-12T19:48:00Z |
| publishDate | 2021-12-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj.art-3eb5ca0860e04f2b9dde001bd6e5875e2023-08-02T03:24:31ZengWiley-VCHAdvanced Materials Interfaces2196-73502021-12-01824n/an/a10.1002/admi.202101016Enhanced Lithium Storage in Micrometer‐Scale Tungsten Bronze Mo3Nb2O14 by Molybdenum Reduction and Oxygen DeficiencyXue Fang0Chao Rong1Lijia Zhou2Congling Yin3Lunhua He4Hongbo Cui5Fengqi Lu6Xiaojun Kuang7Guangxi Key Laboratory of Optical and Electronic Materials and Devices MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials College of Materials Science and Engineering Guilin University of Technology Guilin 541004 P. R. ChinaGuangxi Key Laboratory of Optical and Electronic Materials and Devices MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials College of Materials Science and Engineering Guilin University of Technology Guilin 541004 P. R. ChinaGuangxi Key Laboratory of Optical and Electronic Materials and Devices MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials College of Materials Science and Engineering Guilin University of Technology Guilin 541004 P. R. ChinaGuangxi Key Laboratory of Optical and Electronic Materials and Devices MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials College of Materials Science and Engineering Guilin University of Technology Guilin 541004 P. R. ChinaSpallation Neutron Source Science Center Dongguan 523803 P. R. ChinaGuangxi Key Laboratory of Optical and Electronic Materials and Devices MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials College of Materials Science and Engineering Guilin University of Technology Guilin 541004 P. R. ChinaGuangxi Key Laboratory of Optical and Electronic Materials and Devices MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials College of Materials Science and Engineering Guilin University of Technology Guilin 541004 P. R. ChinaGuangxi Key Laboratory of Optical and Electronic Materials and Devices MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials College of Materials Science and Engineering Guilin University of Technology Guilin 541004 P. R. ChinaAbstract Tungsten bronze transitional metal oxides are potential candidate anode material for lithium‐ion batteries (LIBs) owing to their open multichannel frame structure facilitating lithium transport and storage. Herein, the molybdenum reduction and oxygen deficiency are enhanced in micrometer‐scale Mo5O14‐type tungsten bronze structure Mo3Nb2O14−x (V‐MNO) that is prepared by a solid‐state reaction in vacuum. Neutron powder diffraction data indicate that oxygen vacancies are located at both three‐coordinated (µ3) oxygen sites around filled pentagonal rings and normally two‐coordinated (µ2) oxygen sites. As anode material for LIBs, benefiting from the increased Mo reduction, facilitating the electronic transport and oxygen vacancies without strong site preferences, widening the intratunnel, and opening up the intertunnel migration paths for lithium ions, V‐MNO displays enhanced electrochemical properties with an initial discharge capacity of ≈322 mAh g−1, a charge capacity of ≈274 mAh g−1, and a reversible capacity of ≈147.2 mAh g−1 (at 400 mA g−1) after 200 cycles. The LiCoO2//V‐MNO full cell shows a discharge capacity of 145.4 mAh g−1 after 100 cycles at 100 mA g−1. These results underline significance of controlling defect chemistry on the cationic reduction and oxygen vacancies in micrometer‐scale tungsten bronze transition metal oxides as an effective strategy for enhancing their storage performance as anode materials.https://doi.org/10.1002/admi.202101016anode materialslithium‐ion batteriesMo 3Nb 2O 14molybdenum reductionoxygen vacanciestransitional metal oxides |
| spellingShingle | Xue Fang Chao Rong Lijia Zhou Congling Yin Lunhua He Hongbo Cui Fengqi Lu Xiaojun Kuang Enhanced Lithium Storage in Micrometer‐Scale Tungsten Bronze Mo3Nb2O14 by Molybdenum Reduction and Oxygen Deficiency Advanced Materials Interfaces anode materials lithium‐ion batteries Mo 3Nb 2O 14 molybdenum reduction oxygen vacancies transitional metal oxides |
| title | Enhanced Lithium Storage in Micrometer‐Scale Tungsten Bronze Mo3Nb2O14 by Molybdenum Reduction and Oxygen Deficiency |
| title_full | Enhanced Lithium Storage in Micrometer‐Scale Tungsten Bronze Mo3Nb2O14 by Molybdenum Reduction and Oxygen Deficiency |
| title_fullStr | Enhanced Lithium Storage in Micrometer‐Scale Tungsten Bronze Mo3Nb2O14 by Molybdenum Reduction and Oxygen Deficiency |
| title_full_unstemmed | Enhanced Lithium Storage in Micrometer‐Scale Tungsten Bronze Mo3Nb2O14 by Molybdenum Reduction and Oxygen Deficiency |
| title_short | Enhanced Lithium Storage in Micrometer‐Scale Tungsten Bronze Mo3Nb2O14 by Molybdenum Reduction and Oxygen Deficiency |
| title_sort | enhanced lithium storage in micrometer scale tungsten bronze mo3nb2o14 by molybdenum reduction and oxygen deficiency |
| topic | anode materials lithium‐ion batteries Mo 3Nb 2O 14 molybdenum reduction oxygen vacancies transitional metal oxides |
| url | https://doi.org/10.1002/admi.202101016 |
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