Publication date: 15th December 2025
Thin film solid-state batteries (TFSSB) can act as model system to enable mechanistic insights into battery materials, which would often be obscured by additives and complex microstructure in composite electrodes. TFSSBs use pure materials, have well-defined geometry (parallel layers of known thickness and area) and compact size.1,2 Their architecture also allows for relatively easy investigations of buried interfaces that would be challenging to measure in bulk cells that have multi-phase components with often random structure.3
Transition-metal fluorides (TMFs) represent a promising class of high-energy cathodes but remain poorly understood due to their complex reaction pathways and instability in conventional liquid electrolyte cells. Using co-evaporated TM–LiF heterostructures with LiPON solid-state electrolyte, we systematically explore how the choice of TM (TM = Cr, Mn, Fe, Co, Ni, Cu) in TMF cathodes influences their electrochemical performance.4
We use a combination of galvanostatic cycling, impedance spectroscopy, and post-mortem STEM/EELS/EDX to elucidate the interplay between structure, chemistry and performance. Our best performers differ a lot in terms of their charge-discharge profiles and degradation performance. Briefly, in Fe-LiF, prolonged cycling leads to C-rate dependent restructuring that results in more beneficial nanostructure and increase in available capacity (from 150 to 210 mAh/g at 6C).5 We propose for the first time Cr-LiF cathodes, which show higher initial capacity of 433 mAh/g and similar nano-restructuring. However, the new nanostructure reduces electrochemical performance, which then plateaus at 208 mAh/g after 1500 cycles. Cr-LiF also demonstrates good rate capability with 357 mAh/g at 5C and 192 mAh/g at 8C.6 Moreover, I will discuss the prospects of using interfacial conversion reactions and job-sharing mechanisms to further boost the ion storage capacity and C-rate of thin-film cathodes and our recent results in that field.7,8
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.