Publication date: 10th April 2024
The growth of lithium dendrites in inorganic solid electrolytes is an essential drawback that hinders the development of reliable all-solid-state lithium metal batteries. Generally, post mortem analysis of batteries show that grain boundaries in inorganic solid electrolytes are the preferential sites for lithium dendrite penetration. Operando Kelvin Probe Force Microscopy (KPFM) measurements elucidate the initial aspects of dendritic growth in a Li6.25Al0.25La3Zr2O12 garnet-type solid electrolyte. Strictly speaking solid electrolytes are mixed ionic-electronic conductors. Here KPFM maps the internal electrostatic (Galvani) potential change during battery operation. We find that the Galvani potential drops at grain boundaries near the lithium metal electrode during plating as a response to the accumulation of electrons [1]. Based on these results, we propose a mechanistic model to explain the preferential growth of lithium dendrites and their penetration in inorganic solid electrolytes [1]. In addition, the operando KPFM method enables the characterization of potential distribution across thin-film all-solid-state batteries. Thereby, we detect and follow the space charge layer evolution in a model Li|Li3PO4|LiCoO2 thin film battery at different states of charge in the voltage range from 3.0 V to 4.3 V vs Li+/Li. We find that a space charge layer mainly exists at the LPO|LCO interface. The contribution of the space charge layer to the whole interfacial resistance is >30% at voltages >3.9 V and reaches a maximum value of about 39 Ω cm2 at 4.3 V vs Li/Li+. Both examples of KPFM illustrate that the method is versatile and benefitial for characterizing and understanding batteries and their components [1].
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.