Investigation of internal action to enhance structural stability and electrochemical performance of K+/Mg2+ co-doped cathodes in high voltage environments utilizing dual coordination
Sodium-ion batteries (SIBs) are emerging as a promising alternative for large-scale energy storage, particularly in grid applications. Within the array of potential cathode materials, Fe/Mn-based layered oxides are notable for their advantageous theoretical specific capacity, economic viability, and...
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KeAi Communications Co. Ltd.
2025-02-01
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| Series: | Materials Reports: Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666935825000035 |
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| author | Xuantian Feng Minjie Hou Bowen Xu Yiyong Zhang Da Zhang Yun Zeng Yong Lei Feng Liang |
| author_facet | Xuantian Feng Minjie Hou Bowen Xu Yiyong Zhang Da Zhang Yun Zeng Yong Lei Feng Liang |
| author_sort | Xuantian Feng |
| collection | DOAJ |
| description | Sodium-ion batteries (SIBs) are emerging as a promising alternative for large-scale energy storage, particularly in grid applications. Within the array of potential cathode materials, Fe/Mn-based layered oxides are notable for their advantageous theoretical specific capacity, economic viability, and environmental sustainability. Nevertheless, the practical application of Fe/Mn-based layered oxides is constrained by their suboptimal cycle performance and rate capability during actual charging and discharging. Ion doping is an effective approach for addressing the aforementioned issues. In this context, we have successfully developed a novel K+ and Mg2+ co-doped P2-Na0.7Fe0.5Mn0.5O2 cathode to address these challenges. By doping with 0.05 K+ and 0.2 Mg2+, the cathode demonstrated excellent cycling stability, retaining 95% of its capacity after 50 cycles at 0.2C, whereas the undoped material retained only 59.7%. Even within a wider voltage range, the co-doped cathode retained 88% of its capacity after 100 cycles at 1C. This work integrated Mg2+ to activate oxygen redox reactions in Fe/Mn-based layered cathodes, thereby promoting a reversible hybrid redox process involving both anions and cations. Building on the Mg doping, larger K+ ions were introduced into the edge-sharing Na+ sites, enhancing the material's cyclic stability and expanding the interplanar distance. The significant improvement of Na+ diffusion coefficient by K+/Mg2+ co-doping has been further confirmed via the galvanostatic intermittent titration technique (GITT). The study emphasizes the importance of co-doping with different coordination environments in future material design, aiming to achieve high operating voltage and energy density. |
| format | Article |
| id | doaj-art-83e505038de5478fabf59eebf627600f |
| institution | OA Journals |
| issn | 2666-9358 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Materials Reports: Energy |
| spelling | doaj-art-83e505038de5478fabf59eebf627600f2025-08-20T02:04:01ZengKeAi Communications Co. Ltd.Materials Reports: Energy2666-93582025-02-015110031510.1016/j.matre.2025.100315Investigation of internal action to enhance structural stability and electrochemical performance of K+/Mg2+ co-doped cathodes in high voltage environments utilizing dual coordinationXuantian Feng0Minjie Hou1Bowen Xu2Yiyong Zhang3Da Zhang4Yun Zeng5Yong Lei6Feng Liang7Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China; National Engineering Research Center of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaKey Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China; National Engineering Research Center of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaKey Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China; National Engineering Research Center of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaNational and Local Joint Engineering Research Center of Lithium-ion Batteries and Materials Preparation Technology, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author.Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China; National Engineering Research Center of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaFaculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, ChinaTech Univ Ilmenau, Inst Phys & IMN MacroNano, Fachgebiet Angew Nanophys, D-98693, Ilmenau, GermanyKey Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China; National Engineering Research Center of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author. Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China.Sodium-ion batteries (SIBs) are emerging as a promising alternative for large-scale energy storage, particularly in grid applications. Within the array of potential cathode materials, Fe/Mn-based layered oxides are notable for their advantageous theoretical specific capacity, economic viability, and environmental sustainability. Nevertheless, the practical application of Fe/Mn-based layered oxides is constrained by their suboptimal cycle performance and rate capability during actual charging and discharging. Ion doping is an effective approach for addressing the aforementioned issues. In this context, we have successfully developed a novel K+ and Mg2+ co-doped P2-Na0.7Fe0.5Mn0.5O2 cathode to address these challenges. By doping with 0.05 K+ and 0.2 Mg2+, the cathode demonstrated excellent cycling stability, retaining 95% of its capacity after 50 cycles at 0.2C, whereas the undoped material retained only 59.7%. Even within a wider voltage range, the co-doped cathode retained 88% of its capacity after 100 cycles at 1C. This work integrated Mg2+ to activate oxygen redox reactions in Fe/Mn-based layered cathodes, thereby promoting a reversible hybrid redox process involving both anions and cations. Building on the Mg doping, larger K+ ions were introduced into the edge-sharing Na+ sites, enhancing the material's cyclic stability and expanding the interplanar distance. The significant improvement of Na+ diffusion coefficient by K+/Mg2+ co-doping has been further confirmed via the galvanostatic intermittent titration technique (GITT). The study emphasizes the importance of co-doping with different coordination environments in future material design, aiming to achieve high operating voltage and energy density.http://www.sciencedirect.com/science/article/pii/S2666935825000035Sodium-ion batteriesP2 phaseK+/Mg2+ co-dopedLattice oxygen evolution |
| spellingShingle | Xuantian Feng Minjie Hou Bowen Xu Yiyong Zhang Da Zhang Yun Zeng Yong Lei Feng Liang Investigation of internal action to enhance structural stability and electrochemical performance of K+/Mg2+ co-doped cathodes in high voltage environments utilizing dual coordination Materials Reports: Energy Sodium-ion batteries P2 phase K+/Mg2+ co-doped Lattice oxygen evolution |
| title | Investigation of internal action to enhance structural stability and electrochemical performance of K+/Mg2+ co-doped cathodes in high voltage environments utilizing dual coordination |
| title_full | Investigation of internal action to enhance structural stability and electrochemical performance of K+/Mg2+ co-doped cathodes in high voltage environments utilizing dual coordination |
| title_fullStr | Investigation of internal action to enhance structural stability and electrochemical performance of K+/Mg2+ co-doped cathodes in high voltage environments utilizing dual coordination |
| title_full_unstemmed | Investigation of internal action to enhance structural stability and electrochemical performance of K+/Mg2+ co-doped cathodes in high voltage environments utilizing dual coordination |
| title_short | Investigation of internal action to enhance structural stability and electrochemical performance of K+/Mg2+ co-doped cathodes in high voltage environments utilizing dual coordination |
| title_sort | investigation of internal action to enhance structural stability and electrochemical performance of k mg2 co doped cathodes in high voltage environments utilizing dual coordination |
| topic | Sodium-ion batteries P2 phase K+/Mg2+ co-doped Lattice oxygen evolution |
| url | http://www.sciencedirect.com/science/article/pii/S2666935825000035 |
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