Publication date: 10th April 2024
Metal-organic frameworks (MOFs) constitute a class of porous materials comprising inorganic metal nodes and organic ligands. Due to their designable chemical and structural diversity, MOFs have recently demonstrated high tunability in controlling the functionalities of electrodes, thereby paving the way for the development of fast-charging batteries. In this contribution, we present a novel class of MOFs based on the ligand bis(2-hydroxyethyl) terephthalate (BHET), exhibiting an anomalous behavior in lithium storage in response to insertion reactions. In contrast to conventional battery materials, which often suffer from degradation in storage capacity, BHET-based MOFs exhibit a distinctive behavior wherein significant growth in charge storage is observed even after hundreds of cycles of lithium insertion and extraction. This anomalous phenomenon of charge storage indicates an electrochemically self-activated reaction occurring in BHET-based MOF electrodes.
X-ray diffraction characterization reveals a dramatic structural transformation, turning the MOF structure from well-crystalline to amorphous during (de)lithiation processes. Furthermore, an investigation using transmission X-ray microscopy (TXM) demonstrates the evolution of pore construction during battery cycling. These structural characterizations, in conjunction with the redox of metal node ions studied by X-ray absorption spectroscopy (XAS), represent that the microstructural transformation of BHET-based MOFs drives the self-activation reaction, leading to the anomalous growth of charge storage capacity within each cycle. Additionally, we observe a transition in the storage mechanism of BHET-based MOF electrodes, initially involving bulk-type intercalation reaction and eventually shifting to an interface-type pseudocapacitive storage mechanism. These findings not only elucidate the complex storage mechanism in MOF-based materials but also shed light on the design of high-performance and long-lasting batteries.
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.