Non-equilibrium Ion Transport in a Hybrid Battery Material
Fuente:
arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
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| _version_ | 1866916934412402688 |
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| author | Cattermull, J. Jagger, B. Cassidy, S. J. Dhir, S. Allan, P. K. Pasta, M. Goodwin, A. L. |
| author_facet | Cattermull, J. Jagger, B. Cassidy, S. J. Dhir, S. Allan, P. K. Pasta, M. Goodwin, A. L. |
| contents | Hybrid materials, which combine inorganic and molecular components, often exhibit structural flexibility that enables unusual functional responses. Among them, Prussian blue analogues (PBAs) are a promising class for post-lithium battery technologies. Here, we show that non-equilibrium transformation processes govern the charge-storage mechanism of a PBA electrode, K2Mn[Fe(CN)6]. Ostensibly, this behavior mirrors that observed in high-rate cycling of conventional cathodes such as LiFePO4, yet arises here for fundamentally different reasons -- namely, low elastic moduli and cooperative distortions inherent to the hybrid framework. Using \emph{operando} methods, we show that framework flexibility limits transport kinetics and promotes collective, metastable pathways. Our results highlight new directions for PBA cathode optimisation, but also suggest a broader relevance of non-equilibrium mechanisms for mass transport in hybrid materials beyond PBAs alone. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_04587 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Non-equilibrium Ion Transport in a Hybrid Battery Material Cattermull, J. Jagger, B. Cassidy, S. J. Dhir, S. Allan, P. K. Pasta, M. Goodwin, A. L. Materials Science Hybrid materials, which combine inorganic and molecular components, often exhibit structural flexibility that enables unusual functional responses. Among them, Prussian blue analogues (PBAs) are a promising class for post-lithium battery technologies. Here, we show that non-equilibrium transformation processes govern the charge-storage mechanism of a PBA electrode, K2Mn[Fe(CN)6]. Ostensibly, this behavior mirrors that observed in high-rate cycling of conventional cathodes such as LiFePO4, yet arises here for fundamentally different reasons -- namely, low elastic moduli and cooperative distortions inherent to the hybrid framework. Using \emph{operando} methods, we show that framework flexibility limits transport kinetics and promotes collective, metastable pathways. Our results highlight new directions for PBA cathode optimisation, but also suggest a broader relevance of non-equilibrium mechanisms for mass transport in hybrid materials beyond PBAs alone. |
| title | Non-equilibrium Ion Transport in a Hybrid Battery Material |
| topic | Materials Science |
| url | https://arxiv.org/abs/2509.04587 |