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Understanding capacity fading from structural degradation in Prussian blue analogues for wide-temperature sodium-ion cylindrical battery.
Nat Commun
March 2025
Institute for Carbon Neutralization Technology, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, PR China.
Low-cost Fe-based Prussian blue analogues often suffer from capacity degradation, resulting in continuous energy loss, impeding commercialization for practical sodium-ion batteries. The underlying cause of capacity decrease remains mysterious. Herein, we show that irreversible phase transitions, structural degradation, deactivation of surface redox centres, and dissolution of transition metal ions in Prussian blue analogues accumulate continuously during cycling.
View Article and Find Full Text PDFLocal-structure insight into the improved superconducting properties of Pb-substituted La(O, F)BiS: a photoelectron holography study.
Sci Rep
March 2025
Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan.
Pb-substituted La(O, F)BiS (Pb-LaOFBiS) exhibits improved superconducting properties and a resistivity anomaly around 100 K that is attributed to a structural transition. We have performed temperature(T)-dependent photoelectron holography (PEH) to study dopant incorporation sites and the local structure change across the anomaly. The PEH study of Pb-LaOFBiS provided evidence for the dominant incorporation sites of Pb and F: Pb atoms are incorporated into the Bi sites and F atoms are incorporated into the O site.
View Article and Find Full Text PDFAtomic scale determination of magnetism and stoichiometry at the LaSrMnO/SrTiO interface: investigation of inverse hysteresis.
NPG Asia Mater
March 2025
Department Dynamics and Transport in Quantum Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany.
Controlling the correlations and electronic reconstruction at the interface of transition metal oxide heterostructures provides a new pathway for tuning their unique physical properties. Here, we investigate the effects of interfacial nonstoichiometry and vertical phase separation on the magnetic properties and proximity-induced magnetism of epitaxial LaSrMnO (LSMO)/SrTiO(001) oxide heterostructures. We also reinvestigate the recently observed inverse hysteresis behavior reported for this system, which we find emanates from the remanent field of the superconducting solenoid and not from antiferromagnetic intra-layer exchange coupling in low coercivity LSMO thin films.
View Article and Find Full Text PDFSuperconductivity in PrNiO Infinite-Layer Nickelates.
Adv Mater
March 2025
Universitè de Strasbourg, CNRS, IPCMS UMR 7504, Strasbourg, F-67034, France.
Several reports about infinite-layer nickelate thin films suggest that the superconducting critical temperature versus chemical doping phase diagram has a dome-like shape, similar to cuprates. Here, a highly reproducible superconducting state in undoped PrNiO thin films grown on SrTiO are demonstrated. Scanning transmission electron microscopy measurements show coherent infinite-layer phase with no visible stacking-fault defects, an overall high structural quality where possible unintentional chemical doping or interstitial oxygen, if present, sum well below the measurable threshold of the technique.
View Article and Find Full Text PDFSuperconductivity in Metal Sulfides.
J Phys Condens Matter
March 2025
Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Rd., Pudong, Beijing, Beijing, 100193, CHINA.
The exploration of high-temperature superconductors and the mechanisms underlying continues to present significant challenges in condensed matter physics. Identifying new potential superconducting platforms is critical for advancing our understanding of superconductivity and its interactions with other quantum states. Metal sulfides constitute a diverse family of materials that exhibit unique physical properties, with crystal structures that can be tailored from one-dimensional (1D) to three-dimensional (3D) by varying the metal-to-sulfur ratio.
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