双层锰酸盐正极LaSr2Mn2O6.96在全固态氟离子电池中的结构与电化学行为

引用本文: VanitaVanita, SchochRoland, PuphalPascal, YilmazHasan, BauerMatthias, ClemensOliver. 双层锰酸盐正极LaSr₂Mn₂O_6.96在全固态氟离子电池中的结构与电化学行为[J]. 物理化学学报, 2026, 42(3): 100181. doi: 10.1016/j.actphy.2025.100181 shu

Citation: Vanita Vanita, Roland Schoch, Pascal Puphal, Hasan Yilmaz, Matthias Bauer, Oliver Clemens. Structural and electrochemical behaviour of bilayer manganite LaSr₂Mn₂O_6.96 cathode for all-solid-state fluoride ion batteries[J]. Acta Physico-Chimica Sinica, 2026, 42(3): 100181. doi: 10.1016/j.actphy.2025.100181 shu

双层锰酸盐正极LaSr₂Mn₂O_6.96在全固态氟离子电池中的结构与电化学行为

1.
University of Stuttgart, Institute for Materials Science, Materials Synthesis Group, Heisenbergstraße 3, 70569 Germany
2.
Institute of Inorganic Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
3.
Max-Planck-Institute, Heisenbergstr. 1, 70569 Stuttgart, Germany

通讯作者: Email: oliver.clemens@imw.uni-stuttgart.de (Oliver Clemens)

摘要: 本研究探讨了Ruddlesden-Popper型双层锰酸盐LaSr₂Mn₂O_6.96作为全固态氟离子电池(FIBs)插层型正极材料的潜力。通过非原位X射线衍射分析了LaSr₂Mn₂O_6.96在氟离子嵌入/脱嵌过程中的结构变化，发现F⁻的嵌入会形成三种不同的四方相。为理解这些物相的复杂行为，采用X射线吸收光谱和磁学测量手段研究了Mn氧化态及配位环境的变化。在20 kN的堆叠压力和1 V至−1 V电位区间的电化学循环中，LaSr₂Mn₂O_6.96的比容量从初始的~30 mAh g⁻¹持续增加至200次循环后的~68 mAh g⁻¹，库仑效率达~99%，且未出现容量衰减迹象。这表明双层锰酸盐LaSr₂Mn₂O_6.96有望成为循环稳定的全固态FIBs正极材料，尤其是在施加堆叠压力的条件下。

关键词:

English

Structural and electrochemical behaviour of bilayer manganite LaSr₂Mn₂O_6.96 cathode for all-solid-state fluoride ion batteries

1.
University of Stuttgart, Institute for Materials Science, Materials Synthesis Group, Heisenbergstraße 3, 70569 Germany
2.
Institute of Inorganic Chemistry and Center for Sustainable Systems Design (CSSD), Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
3.
Max-Planck-Institute, Heisenbergstr. 1, 70569 Stuttgart, Germany

Corresponding author: Email: oliver.clemens@imw.uni-stuttgart.de (Oliver Clemens)

Received Date: 30 June 2025
Accepted Date: 04 September 2025
Revised Date: 27 August 2025
Available Online: 15 March 2026

Abstract: In this study, we explore the potential of the Ruddlesden-Popper (RP)-type bilayer manganite LaSr₂Mn₂O_6.96 as an intercalation-based cathode material for all-solid-state fluoride ion batteries (FIBs). Structural changes of LaSr₂Mn₂O_6.96 during fluoride intercalation and de-intercalation were analyzed via ex situ X-ray diffraction, revealing that F⁻ insertion induces the formation of three distinct tetragonal phases. To understand the complex behavior of these phases, we examined the changes in the Mn oxidation state and coordination environment using X-ray absorption spectroscopy and magnetic measurements. Under stack pressure (20 kN), electrochemical cycling of LaSr₂Mn₂O_6.96 in the potential range of 1 V to −1 V exhibited a continuous increase in specific capacity from capacity of ~30 mAh g⁻¹ to ~68 mAh g⁻¹ over 200 cycles, with ~99% coulombic efficiency and no signs of capacity fading. This makes the bilayer manganite LaSr₂Mn₂O_6.96 a promising candidate for a cycling stable cathode for all-solid-state FIBs, especially under the application of stack pressure.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

双层锰酸盐正极LaSr₂Mn₂O_6.96在全固态氟离子电池中的结构与电化学行为

通讯作者: Email: oliver.clemens@imw.uni-stuttgart.de (Oliver Clemens)

English

Structural and electrochemical behaviour of bilayer manganite LaSr₂Mn₂O_6.96 cathode for all-solid-state fluoride ion batteries

Corresponding author: Email: oliver.clemens@imw.uni-stuttgart.de (Oliver Clemens)

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