Polypyrrole Modified MoS<sub>2</sub> Nanorod Composites as Durable Pseudocapacitive Anode Materials for Sodium-Ion Batteries
As a typical two-dimensional layered metal sulfide, MoS<sub>2</sub> has a high theoretical capacity and large layer spacing, which is beneficial for ion transport. Herein, a facile polymerization method is employed to synthesize polypyrrole (PPy) nanotubes, followed by a hydrothermal met...
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MDPI AG
2022-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/12/2006 |
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| author | Miao Jia Tong Qi Qiong Yuan Peizhu Zhao Mengqiu Jia |
| author_facet | Miao Jia Tong Qi Qiong Yuan Peizhu Zhao Mengqiu Jia |
| author_sort | Miao Jia |
| collection | DOAJ |
| description | As a typical two-dimensional layered metal sulfide, MoS<sub>2</sub> has a high theoretical capacity and large layer spacing, which is beneficial for ion transport. Herein, a facile polymerization method is employed to synthesize polypyrrole (PPy) nanotubes, followed by a hydrothermal method to obtain flower-rod-shaped MoS<sub>2</sub>/PPy (FR-MoS<sub>2</sub>/PPy) composites. The FR-MoS<sub>2</sub>/PPy achieves outstanding electrochemical performance as a sodium-ion battery anode. After 60 cycles under 100 mA g<sup>−1</sup>, the FR-MoS<sub>2</sub>/PPy can maintain a capacity of 431.9 mAh g<sup>−1</sup>. As for rate performance, when the current densities range from 0.1 to 2 A g<sup>−1</sup>, the capacities only reduce from 489.7 to 363.2 mAh g<sup>−1</sup>. The excellent performance comes from a high specific surface area provided by the unique structure and the synergistic effect between the components. Additionally, the introduction of conductive PPy improves the conductivity of the material and the internal hollow structure relieves the volume expansion. In addition, kinetic calculations show that the composite material has a high sodium-ion transmission rate, and the external pseudocapacitance behavior can also significantly improve its electrochemical performance. This method provides a new idea for the development of advanced high-capacity anode materials for sodium-ion batteries. |
| first_indexed | 2024-03-09T22:53:34Z |
| format | Article |
| id | doaj.art-bc692a2b982f49d0a55708adc3d9e95e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T22:53:34Z |
| publishDate | 2022-06-01 |
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| series | Nanomaterials |
| spelling | doaj.art-bc692a2b982f49d0a55708adc3d9e95e2023-11-23T18:15:59ZengMDPI AGNanomaterials2079-49912022-06-011212200610.3390/nano12122006Polypyrrole Modified MoS<sub>2</sub> Nanorod Composites as Durable Pseudocapacitive Anode Materials for Sodium-Ion BatteriesMiao Jia0Tong Qi1Qiong Yuan2Peizhu Zhao3Mengqiu Jia4College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaBeijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaBeijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaBeijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaBeijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaAs a typical two-dimensional layered metal sulfide, MoS<sub>2</sub> has a high theoretical capacity and large layer spacing, which is beneficial for ion transport. Herein, a facile polymerization method is employed to synthesize polypyrrole (PPy) nanotubes, followed by a hydrothermal method to obtain flower-rod-shaped MoS<sub>2</sub>/PPy (FR-MoS<sub>2</sub>/PPy) composites. The FR-MoS<sub>2</sub>/PPy achieves outstanding electrochemical performance as a sodium-ion battery anode. After 60 cycles under 100 mA g<sup>−1</sup>, the FR-MoS<sub>2</sub>/PPy can maintain a capacity of 431.9 mAh g<sup>−1</sup>. As for rate performance, when the current densities range from 0.1 to 2 A g<sup>−1</sup>, the capacities only reduce from 489.7 to 363.2 mAh g<sup>−1</sup>. The excellent performance comes from a high specific surface area provided by the unique structure and the synergistic effect between the components. Additionally, the introduction of conductive PPy improves the conductivity of the material and the internal hollow structure relieves the volume expansion. In addition, kinetic calculations show that the composite material has a high sodium-ion transmission rate, and the external pseudocapacitance behavior can also significantly improve its electrochemical performance. This method provides a new idea for the development of advanced high-capacity anode materials for sodium-ion batteries.https://www.mdpi.com/2079-4991/12/12/2006metal sulfidePPypseudocapacitivesodium-ion batteryanode material |
| spellingShingle | Miao Jia Tong Qi Qiong Yuan Peizhu Zhao Mengqiu Jia Polypyrrole Modified MoS<sub>2</sub> Nanorod Composites as Durable Pseudocapacitive Anode Materials for Sodium-Ion Batteries Nanomaterials metal sulfide PPy pseudocapacitive sodium-ion battery anode material |
| title | Polypyrrole Modified MoS<sub>2</sub> Nanorod Composites as Durable Pseudocapacitive Anode Materials for Sodium-Ion Batteries |
| title_full | Polypyrrole Modified MoS<sub>2</sub> Nanorod Composites as Durable Pseudocapacitive Anode Materials for Sodium-Ion Batteries |
| title_fullStr | Polypyrrole Modified MoS<sub>2</sub> Nanorod Composites as Durable Pseudocapacitive Anode Materials for Sodium-Ion Batteries |
| title_full_unstemmed | Polypyrrole Modified MoS<sub>2</sub> Nanorod Composites as Durable Pseudocapacitive Anode Materials for Sodium-Ion Batteries |
| title_short | Polypyrrole Modified MoS<sub>2</sub> Nanorod Composites as Durable Pseudocapacitive Anode Materials for Sodium-Ion Batteries |
| title_sort | polypyrrole modified mos sub 2 sub nanorod composites as durable pseudocapacitive anode materials for sodium ion batteries |
| topic | metal sulfide PPy pseudocapacitive sodium-ion battery anode material |
| url | https://www.mdpi.com/2079-4991/12/12/2006 |
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