BCMaterials Fortnightly Seminars #23
“Lattice anomalies at the ferroelectric and magnetic transitions in cycloidal Mn0.95Co0.05WO4 and conical Mn0.80Co0.20WO4 multiferroics”
Irene Urcelay Olabarria
(BCMaterials)
Different types of subtle lattice anomalies (Dl/l ∼ 10−5) are reported in the multiferroic Mn1−xCoxWO4 (x = 0.05 and 0.20) compounds coinciding with the successive magnetic transitions below 30 K. Clearly different magnetoelastic effects at the ferroelectric transition (TFE = TN2) were observed for Mn0.95Co0.05WO4 (single-k pure cycloidal order below TFE) andMn0.80Co0.20WO4 (double-k conical order below TFE). The different lattice evolution across TFE results from a distinct relative orientation of the magnetic easy axis and the spiral plane. Whereas both are parallel in Mn0.95Co0.05WO4, the spiral plane is perpendicular to the easy axis in Mn0.80Co0.20WO4.
“Polyanionic Materials as Cathodes for Na-ion Batteries”
Verónica Palomares
(UPV/EHU)
Na-ion batteries are considered one of the most promising energy storage systems for a near post-lithium future. In order to make these batteries come true, every battery component (electrodes, electrolytes, separator) must be optimized to obtain the best possible performance. Research work on polyanionic structures as cathode materials has been intense in the last 5 years. Many reasons support this fact: they possess high operating voltages (due to the inductive effect), there are several known structures that could bear Na ion extraction/insertion, and there exists previous knowledge from Li-ion batteries on some of them.
This contribution gathers the main polyanionic compounds signaled as possible cathodes for Na-ion batteries, with the most relevant advances on them. These materials will be analyzed in terms of energy density (operating voltage and specific capacity), easiness or preparation, morphology affecting electrochemical performance, the need of conductive coatings… This way a general view of the different materials that can be chosen as electrode for a Na-ion battery will be given, pointing out which could be the next steps involved in the research of this type of materials.
Related news
Invited Talk with Marco Sangermano on November 13
BCMaterials will offer a new invited talk on Nov 13, by Marco Sangermano, Full Professor of Polymer Science and Technology at Politecnico di Torino (Italy) The talk, which will take place in the…Scientific and Participation Success for IMOH 2024 Conference
From 15 to 17 October, the BCMaterials headquarters hosted the second edition of the ‘IMOH 2024, 2nd International Meeting on Challenges and Opportunities for HiCANS’ congress, dedicated to neutron…Kick-off Meeting of the BIOntier European project
The kick-off meeting of the BIOntier project (BreakIng FrOntiers in sustainable and circular biocomposites with high performance for multi-sector applications) was held in mid-October in Heraklion (…New cover on Advanced Electronic Materials
A contribution from BCMaterials and colleagues “Printed Memristors: An Overview of Ink, Materials, Deposition Techniques, and Applications”, has been selected as cover of the Advanced Electronic…