Publication date: 10th April 2024
High-performance solid-state electrolytes are indispensable for the development of high power and energy density all-solid-state batteries, which are safer than state-of-the-art, commercially available liquid electrolyte batteries, due to the elimination of flammable components and reduced risk of short- circuiting as a result of Li dendrite formation. In recent years, various halide electrolytes have been reported with conductivities above 1 mS/cm at 25 ºC and high electrochemical stability at high voltages (>4 V).[1,2] The ductility and easy processability at low temperatures, makes this class of materials perfect candidates as catholytes (electrolyte at the positive electrode) for all solid-state batteries. It has been shown how the crystal structure plays a key role for the Li transport properties, with the halide anion sublattice influencing the dimensionality and the amount of charge carriers and cation distribution affecting conductivity.[3,4] In this context, considerable research efforts have been dedicated to optimizing the ionic conductivity by different metal substitution strategies. However, there are still many open questions regarding the key factors governing fast Li kinetics, and a lack of understanding of how partial lattice disorder can affect the different Li diffusion mechanisms.
Since cost and environmental impact are key concerns for mass production of batteries, we have recently developed a new family of partially substituted Zr halides, Li2+yxZr1-xMxCl6, where M= Zn(II), Fe(III), Mg(II) and y= 4-M oxidation state, using low cost, non-critical elements. Our preliminary structural analysis of synchrotron powder X-ray diffraction data, shows that the previously proposed crystal structure for Li2ZrCl6 (space group P-3m1) does not accurately describe the data,[5] and a degree of disorder must be introduced in the Zr sublattice to obtain a meaningful structural fit.
In this work, we have combined variable-temperature Neutron Powder Diffraction (VT-NPD) and high frequency electrochemical impedance spectroscopy (HF-EIS) characterization not only to shed light on the structure-to-property relationship of these halide solid electrolytes but also to understand the role of the different substitution metals on the Li+ diffusion pathways.
This work has received funding from the European Union’s Horizon Europe research and innovation program under grant agreement no. 101069726
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.