Regulating surface electron structure of PtNi nanoalloy via boron doping for high‐current‐density Li‐O2 batteries with low overpotential and long‐life cyclability
Abstract The realization of high‐efficiency, reversible, stable, and safe Li‐O2 batteries is severely hindered by the large overpotential and side reactions, especially at high rate conditions. Therefore, rational design of cathode catalysts with high activity and stability is crucial to overcome th...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2024-02-01
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| Series: | SmartMat |
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| Online Access: | https://doi.org/10.1002/smm2.1150 |
| _version_ | 1797375415304585216 |
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| author | Yajun Ding Yuanchao Huang Yuejiao Li Tao Zhang Zhong‐Shuai Wu |
| author_facet | Yajun Ding Yuanchao Huang Yuejiao Li Tao Zhang Zhong‐Shuai Wu |
| author_sort | Yajun Ding |
| collection | DOAJ |
| description | Abstract The realization of high‐efficiency, reversible, stable, and safe Li‐O2 batteries is severely hindered by the large overpotential and side reactions, especially at high rate conditions. Therefore, rational design of cathode catalysts with high activity and stability is crucial to overcome the terrible issues at high current density. Herein, we report a surface engineering strategy to adjust the surface electron structure of boron (B)‐doped PtNi nanoalloy on carbon nanotubes (PtNiB@CNTs) as an efficient bifunctional cathodic catalyst for high‐rate and long‐life Li‐O2 batteries. Notably, the Li‐O2 batteries assembled with as‐prepared PtNiB@CNT catalyst exhibit ultrahigh discharge capacity of 20510 mA·h/g and extremely low overpotential of 0.48 V at a high current density of 1000 mA/g, both of which outperform the most reported Pt‐based catalysts recently. Meanwhile, our Li‐O2 batteries offer excellent rate capability and ultra‐long cycling life of up to 210 cycles at 1000 mA/g under a fixed capacity of 1000 mA·h/g, which is two times longer than those of Pt@CNTs and PtNi@CNTs. Furthermore, it is revealed that surface engineering of PtNi nanoalloy via B doping can efficiently tailor the electron structure of nanoalloy and optimize the adsorption of oxygen species, consequently delivering excellent Li‐O2 battery performance. Therefore, this strategy of regulating the nanoalloy by doping nonmetallic elements will pave an avenue for the design of high‐performance catalysts for metal‐oxygen batteries. |
| first_indexed | 2024-03-08T19:23:57Z |
| format | Article |
| id | doaj.art-e3ef663c34d645d1acc0446e7ed3bd7f |
| institution | Directory Open Access Journal |
| issn | 2688-819X |
| language | English |
| last_indexed | 2024-03-08T19:23:57Z |
| publishDate | 2024-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | SmartMat |
| spelling | doaj.art-e3ef663c34d645d1acc0446e7ed3bd7f2023-12-26T12:41:47ZengWileySmartMat2688-819X2024-02-0151n/an/a10.1002/smm2.1150Regulating surface electron structure of PtNi nanoalloy via boron doping for high‐current‐density Li‐O2 batteries with low overpotential and long‐life cyclabilityYajun Ding0Yuanchao Huang1Yuejiao Li2Tao Zhang3Zhong‐Shuai Wu4State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian ChinaState Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University Hangzhou ChinaState Key Laboratory of Catalysis, Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian ChinaState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai ChinaState Key Laboratory of Catalysis, Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian ChinaAbstract The realization of high‐efficiency, reversible, stable, and safe Li‐O2 batteries is severely hindered by the large overpotential and side reactions, especially at high rate conditions. Therefore, rational design of cathode catalysts with high activity and stability is crucial to overcome the terrible issues at high current density. Herein, we report a surface engineering strategy to adjust the surface electron structure of boron (B)‐doped PtNi nanoalloy on carbon nanotubes (PtNiB@CNTs) as an efficient bifunctional cathodic catalyst for high‐rate and long‐life Li‐O2 batteries. Notably, the Li‐O2 batteries assembled with as‐prepared PtNiB@CNT catalyst exhibit ultrahigh discharge capacity of 20510 mA·h/g and extremely low overpotential of 0.48 V at a high current density of 1000 mA/g, both of which outperform the most reported Pt‐based catalysts recently. Meanwhile, our Li‐O2 batteries offer excellent rate capability and ultra‐long cycling life of up to 210 cycles at 1000 mA/g under a fixed capacity of 1000 mA·h/g, which is two times longer than those of Pt@CNTs and PtNi@CNTs. Furthermore, it is revealed that surface engineering of PtNi nanoalloy via B doping can efficiently tailor the electron structure of nanoalloy and optimize the adsorption of oxygen species, consequently delivering excellent Li‐O2 battery performance. Therefore, this strategy of regulating the nanoalloy by doping nonmetallic elements will pave an avenue for the design of high‐performance catalysts for metal‐oxygen batteries.https://doi.org/10.1002/smm2.1150B dopingbifunctional catalystLi‐O2 batterylow charge overpotentialPtNi nanoalloy |
| spellingShingle | Yajun Ding Yuanchao Huang Yuejiao Li Tao Zhang Zhong‐Shuai Wu Regulating surface electron structure of PtNi nanoalloy via boron doping for high‐current‐density Li‐O2 batteries with low overpotential and long‐life cyclability SmartMat B doping bifunctional catalyst Li‐O2 battery low charge overpotential PtNi nanoalloy |
| title | Regulating surface electron structure of PtNi nanoalloy via boron doping for high‐current‐density Li‐O2 batteries with low overpotential and long‐life cyclability |
| title_full | Regulating surface electron structure of PtNi nanoalloy via boron doping for high‐current‐density Li‐O2 batteries with low overpotential and long‐life cyclability |
| title_fullStr | Regulating surface electron structure of PtNi nanoalloy via boron doping for high‐current‐density Li‐O2 batteries with low overpotential and long‐life cyclability |
| title_full_unstemmed | Regulating surface electron structure of PtNi nanoalloy via boron doping for high‐current‐density Li‐O2 batteries with low overpotential and long‐life cyclability |
| title_short | Regulating surface electron structure of PtNi nanoalloy via boron doping for high‐current‐density Li‐O2 batteries with low overpotential and long‐life cyclability |
| title_sort | regulating surface electron structure of ptni nanoalloy via boron doping for high current density li o2 batteries with low overpotential and long life cyclability |
| topic | B doping bifunctional catalyst Li‐O2 battery low charge overpotential PtNi nanoalloy |
| url | https://doi.org/10.1002/smm2.1150 |
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