Enhanced Lithium Storage Performance of α-MoO<sub>3</sub>/CNTs Composite Cathode
Orthorhombic molybdenum oxide (α-MoO<sub>3</sub>), as a one-layered pseudocapacitive material, has attracted widespread attention due to its high theoretical lithium storage specific capacity (279 mAh/g) for lithium-ion batteries’ cathode. Nevertheless, low conductivity, slack reaction k...
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MDPI AG
2023-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/15/2272 |
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| author | Dawei Sheng Ang Gao Xiaoxu Liu Qiang Zhang |
| author_facet | Dawei Sheng Ang Gao Xiaoxu Liu Qiang Zhang |
| author_sort | Dawei Sheng |
| collection | DOAJ |
| description | Orthorhombic molybdenum oxide (α-MoO<sub>3</sub>), as a one-layered pseudocapacitive material, has attracted widespread attention due to its high theoretical lithium storage specific capacity (279 mAh/g) for lithium-ion batteries’ cathode. Nevertheless, low conductivity, slack reaction kinetics, and large volume change during Li<sup>+</sup> ions intercalation and deintercalation seriously limit the practical application of α-MoO<sub>3</sub>. Herein, we added a small number of CNTs (1.76%) to solve these problems in a one-step hydrothermal process for preparing the α-MoO<sub>3</sub>/CNTs composite. Because of the influence of CNTs, the α-MoO<sub>3</sub> nanobelt in the α-MoO<sub>3</sub>/CNTs composite had a larger interlayer spacing, which provided more active sites and faster reaction kinetics for lithium storage. In addition, CNTs formed a three-dimensional conductive network between α-MoO<sub>3</sub> nanobelts, enhanced the electrical conductivity of the composite, accelerated the electron conduction, shortened the ion transport path, and alleviated the structural fragmentation caused by the volume expansion during the α-MoO<sub>3</sub> intercalation and deintercalation of Li<sup>+</sup> ions. Therefore, the α-MoO<sub>3</sub>/CNTs composite cathode had a significantly higher rate performance and cycle life. After 150 cycles, the pure α-MoO<sub>3</sub> cathode had almost no energy storage, but α-MoO<sub>3</sub>/CNTs composite cathode still retained 93 mAh/g specific capacity. |
| first_indexed | 2024-03-11T00:19:02Z |
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| id | doaj.art-0e94e486ace74443a24ca9131d8eef41 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T00:19:02Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-0e94e486ace74443a24ca9131d8eef412023-11-18T23:22:28ZengMDPI AGNanomaterials2079-49912023-08-011315227210.3390/nano13152272Enhanced Lithium Storage Performance of α-MoO<sub>3</sub>/CNTs Composite CathodeDawei Sheng0Ang Gao1Xiaoxu Liu2Qiang Zhang3Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, ChinaKey Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, ChinaShaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, ChinaKey Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, ChinaOrthorhombic molybdenum oxide (α-MoO<sub>3</sub>), as a one-layered pseudocapacitive material, has attracted widespread attention due to its high theoretical lithium storage specific capacity (279 mAh/g) for lithium-ion batteries’ cathode. Nevertheless, low conductivity, slack reaction kinetics, and large volume change during Li<sup>+</sup> ions intercalation and deintercalation seriously limit the practical application of α-MoO<sub>3</sub>. Herein, we added a small number of CNTs (1.76%) to solve these problems in a one-step hydrothermal process for preparing the α-MoO<sub>3</sub>/CNTs composite. Because of the influence of CNTs, the α-MoO<sub>3</sub> nanobelt in the α-MoO<sub>3</sub>/CNTs composite had a larger interlayer spacing, which provided more active sites and faster reaction kinetics for lithium storage. In addition, CNTs formed a three-dimensional conductive network between α-MoO<sub>3</sub> nanobelts, enhanced the electrical conductivity of the composite, accelerated the electron conduction, shortened the ion transport path, and alleviated the structural fragmentation caused by the volume expansion during the α-MoO<sub>3</sub> intercalation and deintercalation of Li<sup>+</sup> ions. Therefore, the α-MoO<sub>3</sub>/CNTs composite cathode had a significantly higher rate performance and cycle life. After 150 cycles, the pure α-MoO<sub>3</sub> cathode had almost no energy storage, but α-MoO<sub>3</sub>/CNTs composite cathode still retained 93 mAh/g specific capacity.https://www.mdpi.com/2079-4991/13/15/2272cathodeα-MoO<sub>3</sub>carbon nanotubeslithium-ion batteries |
| spellingShingle | Dawei Sheng Ang Gao Xiaoxu Liu Qiang Zhang Enhanced Lithium Storage Performance of α-MoO<sub>3</sub>/CNTs Composite Cathode Nanomaterials cathode α-MoO<sub>3</sub> carbon nanotubes lithium-ion batteries |
| title | Enhanced Lithium Storage Performance of α-MoO<sub>3</sub>/CNTs Composite Cathode |
| title_full | Enhanced Lithium Storage Performance of α-MoO<sub>3</sub>/CNTs Composite Cathode |
| title_fullStr | Enhanced Lithium Storage Performance of α-MoO<sub>3</sub>/CNTs Composite Cathode |
| title_full_unstemmed | Enhanced Lithium Storage Performance of α-MoO<sub>3</sub>/CNTs Composite Cathode |
| title_short | Enhanced Lithium Storage Performance of α-MoO<sub>3</sub>/CNTs Composite Cathode |
| title_sort | enhanced lithium storage performance of α moo sub 3 sub cnts composite cathode |
| topic | cathode α-MoO<sub>3</sub> carbon nanotubes lithium-ion batteries |
| url | https://www.mdpi.com/2079-4991/13/15/2272 |
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