Publication date: 10th April 2024
Lithium iron phosphate (LFP) has emerged as a prominent electrode material for electric vehicles due to its high safety and low cost. However, the use of nanoscale primary particles results in low tap density, leading to a low volumetric energy density. To overcome this limitation, aggregating primary particles into spherical secondary particles with high tap density is a promising strategy. However, employing such spherical LFP secondary particles adversely affects the processability of the electrode with an exfoliation phenomenon occurring after the calendaring process. Here, we identify the reasons for this poor electrode processability and propose the effective solution by comparing the binder distribution in electrodes fabricated using primary particles versus those made from spherical secondary particles. Analysis through secondary electron microscopy and laser scanning confocal microscopy revealed that the large size of the secondary particles leads to the formation of considerable empty spaces, while the binder predominantly distributes on the surface of LFP due to its strong adhesion to LFP. These void spaces and the non-uniform distribution of the binder hinder attachment between the electrode components. To address this issue, we fill the void spaces with an appropriate amount of primary particles. By filling the void spaces, the binder distribution becomes more uniform, resulting in a significant increase in the interfacial adhesion between the electrode components by over tenfold. Furthermore, the volumetric energy density has also been improved due to introduction of secondary particles. This work provides insights into the design of electrodes to enhance electrode processability and energy density of LFP batteries.
This work was supported by LG chem.
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.