Soumitra Satapathi’s Post

We proudly share that our partners from BeDimensional (BeD) published a new article, entitled: “Hydrogen-Assisted Thermal Treatment of Electrode Materials for Electrochemical Double-Layer Capacitors”, published in ACS Applied Materials & Interfaces. The article explores ways to enhance the performance of electrochemical double-layer capacitors (EDLCs), which are important for energy storage in various applications. The study focuses on H2-assisted thermal treatment and its effects on the chemical, structural and thermal properties of activated carbon and corresponding electrodes. Contrary to previous studies, the energy density improvement is attributed not to graphitization of the carbon but to the removal of surface contaminants, leading to better surface capacitance. The study highlights changes in active material and binder contents as factors contributing to increased capacitance. Overall, this research shed new light on the relationship between the modifications of the electrode materials induced by H2-assisted thermal treatments and the performance of the resulting EDLCs. We congratulate BeD on their success and wish them continued achievements in their endeavors! Read more here: https://lnkd.in/evA7-6fU You can find all the project-related publications here: https://lnkd.in/eRbkQ-zb #greenenergy #energystorage #sustainability #supercapacitors #GREENCAP #horizoneurope #electrodes #graphite #activatedcarbon #capacitance #hydrogen

📜Research Article: ✍🏻Kurt V Mikkelsen #Understanding #Experiments Through #Simulated #Photoinduced #Electron #Transfer: The #Case of 1,3-Bis(3-perylenyl)propane #ABSTRACT Photoinduced electron transfer reactions have been investigated for 1,3-bis(3-perylenyl)propane using a theoretical method that includes interactions between multiple charge-configurations of the system and its coupling to its intramolecular phonon modes.... #Introduction Photoinduced electron transfer reactions are of great importance and are essential steps in the photosynthesis, where solar energy is turned into chemical energy.... #Results and #Discussion The first step is to consider and describe all relevant system states. The system (Pe-Pr-Pe) consists of two perylene units bridged by a propyl unit and two important conformers, labelled Pe-Pr-Peclosed and Pe-Pr-Peopen (Figure 1), exist.... #Conclusion The observations above can now be compared with the findings of Markovic etal. They used transient absorption meausurements to measure the rise of cationic and anionic perylene which appear with both hole transfer and electron transfer.... 📰 Get full-length article here: https://lnkd.in/gDYNH7TK We do accept #PPTs and #Video Articles to be publish within our Journal. You can send us your article to given email #Email: onlinescientificresearch@gmail.com

New publication alert! Grimaldi et al. have just published an interesting article on the photostability of 2D and quasi-2D hybrid organic-inorganic perovskites (HOIPs). https://lnkd.in/gFB5v8xt For the past 15 years, perovskite research has focused on improving the photovoltaic power conversion efficiency of 3D perovskites, which are now nearing the performance of state-of-the-art silicon photovoltaics. However, these materials face stability challenges under certain environmental conditions. Recent research shows that certain 2D and quasi-2D perovskites offer enhanced stability due to their large, organic sublattices. In this study, Grimaldi et al. examine the photostability of a set of related 2D and quasi-2D perovskites, using a range of analytical techniques (SEM/EDX, XRF, FTIR, and photoluminescence measurements). They tested these materials under various atmospheric conditions, namely atmospheric air, nitrogen, and dry air, while exposing them to laser illumination to understand how degradation occurs. Their findings highlight oxygen's crucial role in the photodegradation of these materials, and they show how adding a capping layer can significantly slow down photoluminescence decay. For anyone interested in enhancing the stability of lower-dimensional perovskites like I am, this paper is both thorough and thought-provoking. While certain 2D structures may be more stable than 3D counterparts, there is still much work to be done in designing structures with greater environmental photostability and effective passivation strategies for broader implementation in photovoltaic devices and renewable energy technologies. Exciting times ahead! #Perovskites #Photovoltaics #Photostability #HybridPerovskites #MaterialsScience #RenewableEnergy #SolarEnergy #HybridMaterials #MetalHalidePerovskites #HOIPs #SustainableEnergy #Semiconductors #SemiconductorMaterials

This is Material Science at its best and applied to #perovskite solar cells. Modifying the perovskite/charge-transport layer interface using a thin Ruddlesden-Popper (RP) interlayer is a common method to achieve high-efficiency solar cells. The effectiveness of this passivation layer depends on its growth quality: solution processing is the most used deposition technique, but it delivers mixed results. Prof. Correa-Baena at the Georgia Institute of Technology reached perfect control of the RP interlayer through thermal co-evaporation. They deposited RP layers with a thickness ranging from 2 to 60 nm and carefully analyzed their growth dynamics. FA+ diffuses from the bulk of the perovskite into the RP layer, forming a gradient heterostructure across the layer thickness. With thicker depositions, a 2D RP layer forms on top of the heterostructure. To understand how this affects the solar cells' efficiency, they performed parallel JV characterizations with Litos-Lite from FLUXiM AG. Parallel analyses meant that all variables except the layer thickness were kept constant while collecting the JV curves. Compared to the control device with no passivation, the PCE was consistently higher when interlayers ranging from 2 to 40 nm were used. At 20 nm, they obtained an absolute performance increase of 2%. https://lnkd.in/eCgCiSRc #perovskites #photovoltaics #solarcells #solarpv #research

📚Energy Storage and Conversion (ESC, 3029-2778) Experimental exploration of nano-phase change material composites for thermal management in Lithium-ion batteries ✍️Vishnu M., Anooplal B., Rajesh Baby 🔗https://lnkd.in/g_hisAZi #nanomaterials; #thermal management; phase change materials; mock up battery

Our second publication in collaboration with iGii developing high energy density #supercapacitors is out on Wiley's Batteries & Supercapacitor. Here we prepared a new electrodeposition route for iron oxides and couple it in asymmetric devices to extend the working voltage. In-situ Raman was used to look into the charge storage mechanism. https://lnkd.in/d7K49i69

Degradation processes of the electrolyte and the electrodes in high voltage (up to 4.5 V) NMC cells still limit their lifetime substantially, the rollover effect is one of the most known issues here. The overall goal is to overcome these issues with new and greener components. For the knowledge-based design of new components we need to understand first what is happening, in order to prevent the same from happening again in trial-and-error approaches. In this open-access study, we approached this understanding of the degradation processes of perchlorate in EC/EMC, leading to a worse performance compared to hexafluorophosphate. We report on the chlorination of EMC and the sedimentation of (Liw)AlxOyClz composite deposits on the cathode active material. A big thanks to all co-authors for their support! Felix Pfeiffer Christian Lechtenfeld Silvan Stuckenberg Nick Fehlings Dr. Lars Frankenstein Verena Küpers JianFen Wang Sascha Nowak Masoud Baghernejad https://lnkd.in/eFsjmhB6

I am happy to announce that our latest research has been Accepted to publish as "Carbon nanostructures-based transformer oil nanofluids as coolants with enhanced performance" in "Journal of Dispersion Science and Technology" Taylor & Francis Group Transformer oil (TO) is a highly pure oil with high durability at high temperatures and a superior electrical insulator. TO is utilized as insulation and coolant. One of the common problems of TO is overheating, especially in warm seasons, which reduces the efficiency of the transformer, power outages, etc. In this research, heat transfer coefficient, dimensionless numbers, dielectric breakdown voltage, and physical properties of nanofluids were investigated to improve the efficiency of the transformer by adding nanofluids, including graphene nanoplatelets (GNP) and multi-walled carbon nanotubes (MWCNT) to TO. The results showed that the natural convective heat transfer coefficient (NHTC) of 0.005%wt GNP/TO increased 8.6% and 12.8% compared to pure TO and 0.005%wt MWCNT/TO. Besides, the forced convective heat transfer coefficient (FHTC) of 0.005%wt GNP/TO was enhanced by 8.3% and 9.0% compared to pure TO and 0.005%wt MWCNT/TO, respectively. Dielectric breakdown voltage in GNP/TO and MWCNT/TO nanofluids decreased compared to pure TO due to free electrons. The density of TO also increased by adding GNP and MWCNT. The thermal conductivity of GNP/TO nanofluid was also higher than pure oil and MWCNT/TO and increased by rising temperature. In contrast, the thermal conductivity of natural transformer oil was reduced by raising the temperature. Congratulations to all my friends, Mehdi Shanbedi. We gratefully acknowledge VCN Materials Co., Ltd. (VCN Materials) for providing nanoparticles and Ferdowsi University of Mashhad and Pasargad Heavy Crude Oil Refinery (Pars Behin Palayesh Naft Qeshm & Pasargad Energy) for providing us with laboratory equipment. https://lnkd.in/gd7BrVpe

Ammonia Fueled Solid Oxide Fuel Cell (SOFC): Cell to System Level To effectively develop a technology, it is crucial to understand its various aspects and levels to ensure its reliability and efficiency. 🌱 We have developed a multiscale, multiphysics approach to address different levels of ammonia-fueled SOFCs, encompassing the cell, stack, and system levels. Two types of cells, designed for operation at low and high temperatures, are compared. Various ratios of ammonia pre-checking are investigated to prevent nitriding degradation. 🔬 You can check more results in our research paper "Multiscale multiphysics modeling of ammonia-fueled solid oxide fuel cell: Effects of temperature and pre-cracking on reliability and performance of stack and system" published in Applied Energy, 373, 123913(2024)! 🚀 I would like to express my sincere gratitude to the co-authors and my colleagues at DTU Energy and AMON Project EU for their support and collaboration. Authors: Arash Nemati, Omid Babaie Rizvandi, Rafael Nogueira Nakashima, Javid Beyrami, Henrik Lund Frandsen Funding: AMON Project EU Interested in clean energy innovation? Check out the paper [https://lnkd.in/g9FdGWWE]! #Ammonia #SOFC #System #Nitriding #Decarbonization #COMSOL

Quaternary Heusler (QH) compounds, defined by the chemical formula XX’YZ, have gained popularity in the energy materials domain for their adaptable electronic structures. This study focuses on the synthesis of two novel QH compounds, NiFeMnAl and ZnFeVAl, using arc-melting and hot-pressing at 1073 K. The maximum Seebeck coefficients were approximately −20.48 μV/K and −17.25 μV/K at 773 K for ZnFeVAl and NiFeMnAl, respectively. The assessed power factor was approximately 0.058 mWm−1K−2 for NiFeMnAl and approximately 0.020 mWm−1K−2 for ZnFeVAl at 773 K. In addition, the lattice thermal conductivity (κl) was found to be 8.73 Wm−1K−1 for NiFeMnAl and 6.92 Wm−1K−1 for ZnFeVAl at 773 K. ZnFeVAl had a 20.73% drop in κl because the chemical bonds were distorted by changes in the electronegativity of the elements that make it up. Consequently, these novel compounds present a promising opportunity for additional investigation in thermoelectric materials to achieve superior performance for practical thermoelectric device applications. https://lnkd.in/gMVRMdVY