Publication date: 10th April 2024
The ever-growing demand for electrochemical energy storage has brought great attention to solid-state battery research in recent years, with solid-state sodium batteries being already commercially available today. In parallel, it has become evident, that thermal management is an indispensable factor for optimizing battery lifetime and performance. The NASICON-substitution series (Na1+xZr2P3-xSixO12, x=0-3) is one of the most well studied and promising sodium solid-electrolytes as they combine high stability with reasonably good ionic conductivity. However, deep knowledge of thermal transport behavior in this and other solid electrolytes is often lacking, and many connections remain elusive.
In this work the thermal conductivities of Na1Zr2P3O12 and Na4Zr2Si3O12 are assessed experimentally and by ab-initio modelling in a wide temperature range of 2 K to 773 K. Anharmonic lattice dynamics calculations are combined with a 2-channel model to demonstrate that both, phonon-gas like and heat transport via local random walk of heat (so-called diffusons) are present in NASICON compounds. It is intuitively shown how phonon linewidth broadening leads to a saturating behavior of thermal conductivity opposed to the 1/T decay found for the classic phonon-gas model. Additionally, detailed evaluations of the phonon density of states by projection on atoms, sites, and in jump direction are joined with temperature dependent X-ray diffraction to provide insights how the jumps of sodium ions are driven by their vibrational spectrum. This presentation will display how lattice dynamics calculations as well as experimental methods can be used to obtain a more holistic picture of ionic and thermal transport in the NASICON-series and unravel their interplay.
Th.B. is a member of the International Graduate School for Battery Chemistry, Characterization, Analysis, Recycling and Application (BACCARA), which is funded by the Ministry for Culture and Science of North Rhine Westphalia, Germany. The simulations for this work were performed on the computer cluster PALMA II of the University of Münster.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.