PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion Storage
Potassium-ion batteries (KIBs) have come up as a potential alternative to lithium-ion batteries due to abundant potassium storage in the crust. Red phosphorus is a promising anode material for KIBs with abundant resources and high theoretical capacity. Nevertheless, large volume expansion, low elect...
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MDPI AG
2021-06-01
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| Series: | Nanomaterials |
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| author | Dan Zhao Qian Zhao Zhenyu Wang Lan Feng Jinying Zhang Chunming Niu |
| author_facet | Dan Zhao Qian Zhao Zhenyu Wang Lan Feng Jinying Zhang Chunming Niu |
| author_sort | Dan Zhao |
| collection | DOAJ |
| description | Potassium-ion batteries (KIBs) have come up as a potential alternative to lithium-ion batteries due to abundant potassium storage in the crust. Red phosphorus is a promising anode material for KIBs with abundant resources and high theoretical capacity. Nevertheless, large volume expansion, low electronic conductivity, and limited K<sup>+</sup> charging speed in red phosphorus upon cycling have severely hindered the development of red phosphorus-based anodes. To obtain improved conductivity and structural stability, surface engineering of red phosphorus is required. Poly(3,4-ethylenedioxythiophene) (PEDOT)-coated red phosphorus nanospheres (RPNP@PEDOT) with an average diameter of 60 nm were synthesized via a facile solution-phase approach. PEDOT can relieve the volume change of red phosphorus and promote electron/ion transportation during charge−discharge cycles, which is partially corroborated by our DFT calculations. A specific capacity of 402 mAh g<sup>−1</sup> at 0.1 A g<sup>−1</sup> after 40 cycles, and a specific capacity of 302 mAh g<sup>−1</sup> at 0.5 A g<sup>−1</sup> after 275 cycles, were achieved by RPNP@PEDOT anode with a high pseudocapacitive contribution of 62%. The surface–interface engineering for the organic–inorganic composite of RPNP@PEDOT provides a novel perspective for broad applications of red phosphorus-based KIBs in fast charging occasions. |
| first_indexed | 2024-03-10T09:55:13Z |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T09:55:13Z |
| publishDate | 2021-06-01 |
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| spelling | doaj.art-d9aee815ec1d4af58816231a6c1b8fd92023-11-22T02:28:27ZengMDPI AGNanomaterials2079-49912021-06-01117173210.3390/nano11071732PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion StorageDan Zhao0Qian Zhao1Zhenyu Wang2Lan Feng3Jinying Zhang4Chunming Niu5School of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, ChinaSchool of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, ChinaCenter of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710054, ChinaSchool of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, ChinaCenter of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710054, ChinaCenter of Nanomaterials for Renewable Energy, State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710054, ChinaPotassium-ion batteries (KIBs) have come up as a potential alternative to lithium-ion batteries due to abundant potassium storage in the crust. Red phosphorus is a promising anode material for KIBs with abundant resources and high theoretical capacity. Nevertheless, large volume expansion, low electronic conductivity, and limited K<sup>+</sup> charging speed in red phosphorus upon cycling have severely hindered the development of red phosphorus-based anodes. To obtain improved conductivity and structural stability, surface engineering of red phosphorus is required. Poly(3,4-ethylenedioxythiophene) (PEDOT)-coated red phosphorus nanospheres (RPNP@PEDOT) with an average diameter of 60 nm were synthesized via a facile solution-phase approach. PEDOT can relieve the volume change of red phosphorus and promote electron/ion transportation during charge−discharge cycles, which is partially corroborated by our DFT calculations. A specific capacity of 402 mAh g<sup>−1</sup> at 0.1 A g<sup>−1</sup> after 40 cycles, and a specific capacity of 302 mAh g<sup>−1</sup> at 0.5 A g<sup>−1</sup> after 275 cycles, were achieved by RPNP@PEDOT anode with a high pseudocapacitive contribution of 62%. The surface–interface engineering for the organic–inorganic composite of RPNP@PEDOT provides a novel perspective for broad applications of red phosphorus-based KIBs in fast charging occasions.https://www.mdpi.com/2079-4991/11/7/1732red phosphoruspotassium-ion storagePEDOTdiffusionpseudocapacitive |
| spellingShingle | Dan Zhao Qian Zhao Zhenyu Wang Lan Feng Jinying Zhang Chunming Niu PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion Storage Nanomaterials red phosphorus potassium-ion storage PEDOT diffusion pseudocapacitive |
| title | PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion Storage |
| title_full | PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion Storage |
| title_fullStr | PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion Storage |
| title_full_unstemmed | PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion Storage |
| title_short | PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion Storage |
| title_sort | pedot coated red phosphorus nanosphere anodes for pseudocapacitive potassium ion storage |
| topic | red phosphorus potassium-ion storage PEDOT diffusion pseudocapacitive |
| url | https://www.mdpi.com/2079-4991/11/7/1732 |
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