Article
Materials Science, Ceramics
Malgorzata Osinska, Piotr Krawczyk, Teresa Luczak, Tomasz Rozmanowski
Summary: N-, Ni-, and graphene oxide (GO)-doped carbon xerogel were synthesized and characterized. The BET surface area of the doped carbon xerogel decreased by about 2% compared to the unmodified carbon xerogel, while the cumulative pore volume and average pore diameter increased by about 50% and 32% respectively. The N-Ni-GO-doped carbon xerogel exhibited the highest specific capacitance of 222 Fg(-1) and showed excellent stability during galvanostatic charge-discharge and cycling tests.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Yanjun Pang, Xinxin Luan, Kefeng Zhang, Yuxiang Liu, Lu Li, Congxia Xie, Jinhui Pang
Summary: In this study, a freeze-resistant conductive hydrogel with fast polymerization rate, excellent mechanical and adhesive properties was successfully prepared. Hydrogels capable of rapid polymerization were prepared using the TA@WSCA-Zn autocatalytic system at room temperature or low temperature. The introduction of amphoteric ions greatly improved the frost resistance and electrical conductivity of the hydrogels. The supercapacitor assembled from the hydrogel electrolyte showed good capacitance characteristics and cycle life after folding and 10,000 charge/discharge cycles. This autocatalytic system provides a new strategy and approach for the preparation of freeze-resistant conductive hydrogel electrolytes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jeong Eun Park, Hyeongmin Je, Chae Ryean Kim, Sudong Park, Yeonuk Yu, Woongbi Cho, Sukyoung Won, Dong Jun Kang, Tae Hee Han, Rhokyun Kwak, Seung Goo Lee, Sanha Kim, Jeong Jae Wie
Summary: This article reports on the fabrication of multilayered 3D sharkskin using magnetic actuation and chemical fixation techniques. The artificial sharkskin exhibits drag reduction, friction anisotropy, mechanical robustness, and structural recovery. The addition of harder materials such as zinc oxide and platinum enhances the mechanical properties of the polymeric sharkskin.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Lei Wang, Rong Liu, Xiaolong Li, Yuanming Wang, Yang Liu, Yang Bai, Ming Xu, Guohui Yuan
Summary: Developing a novel edge-functionalized strategy can enhance the electrical conductivity of oxygen functionalized carbon materials, providing abundant active sites and good conductivity in EOCF for potential applications in wearable electronics. By combining scalable fabrication strategies with low-cost materials, a yarn electrode with high capacitance and excellent mechanical properties has been successfully prepared, making it a promising option for energy storage devices.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Ria Kunwar, Bhupender Pal, Izan Izwan Misnon, Hamdan Daniyal, Fatemeh Zabihi, Shengyuan Yang, Zdenek Sofer, Chun-Chen Yang, Rajan Jose
Summary: A simple protocol is presented to characterize EDLCs using self-discharge data and a three-branch electrical model. The method estimates the parametric values in the model based on recorded self-discharge data and experiments with carbon and metal oxide electrodes in three choice electrolytes. The model enables determination of charge storage parameters and capacitive nature of the device from a single self-discharge data.
Article
Nanoscience & Nanotechnology
Omid Aghababaei Tafreshi, Zia Saadatnia, Shahriar Ghaffari-Mosanenzadeh, Ambrish Kumar, Meysam Salari, Sara Mohseni Taromsari, Mohammad Mahdi Rastegardoost, Chul B. Park, Hani E. Naguib
Summary: This study presents a method for fabricating high-performance polyimide-carbon nanotube aerogel composite films. The films exhibit low shrinkage and density, high pore volume, surface area, real permittivity, and electrical conductivity, as well as ultrahigh service temperature. Furthermore, the films demonstrate good flexibility and durability, making them suitable for supercapacitor electrodes.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Berceste Beyribey, Hwan Kim, Joshua Persky
Summary: BaCe0.7Zr0.1Y0.16Zn0.04O3-δ perovskite shows great potential as an electrolyte in industrial steam electrolysis applications, with excellent protonic conductivity and stability, especially at elevated temperatures. The formation/degradation of secondary phases in wet atmospheres is attributed to the formation of Ba(OH)2 and CeO2 around 500 degrees C. This material is a promising candidate for industrial fuel cells and steam electrolysers.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Sengodan Prabhu, Moorthy Maruthapandi, Arulappan Durairaj, Srinivasan Arun Kumar, John H. T. Luong, Rajendran Ramesh, Aharon Gedanken
Summary: Ni(1-alpha)Co(alpha)MoO4 (alpha = 0, 0.1, 0.3, and 0.5 M) nanorods were successfully synthesized via a hydrothermal method and proved to be excellent electrode materials for a hybrid supercapacitor. The electrochemical properties of the nanorods were found to be dependent on the Ni/Co ratio, as shown by various electrochemical techniques. Ni0.5Co0.5MoO4 (alpha = 0.5 M) exhibited a specific capacity (Qg) of 354 Cg-1@1 Ag-1 with a notable retention capacity of 92% after 8000 repeated cycles at 10 Ag-1. Ni0.5Co0.5MoO4 with a high surface area outperformed mono-metallic (NiMoO4) and bimetallic (Ni0.9Co0.1MoO4 and Ni0.7Co0.3MoO4) nanostructures. The hybrid supercapacitor (Ni0.5Co0.5MoO4//activated carbon) delivered a maximum Qcell of 53 Cg-1 at 1 Ag-1 with an energy density of 16.2 Wh kg-1 and a power density of 725 W kg-1.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Energy & Fuels
Kian Yousefipour, Rasoul Sarraf-Mamoory, Aida Chaychi Maleki
Summary: Over the past decade, researchers have focused on enhancing the electrical conductivity of nickel molybdate materials to improve their supercapacitive performance. In this study, NiMoO4 nanoparticles were prepared using a simple ball-milling technique and incorporated into multi-walled carbon nanotubes (MWCNTs) through blending and ball-milling. The resulting ball-milled nanocomposite exhibited excellent supercapacitive properties due to its high surface area, conductivity, fast kinetics, and active sites.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Ao Wang, Wei Xu, Yunjuan Sun, Kang Sun, Jianchun Jiang
Summary: In this study, a well-designed heterogeneous structure activated carbon (HGCAC) was prepared to simultaneously improve the electrical conductivity and the pore affinity for aqueous electrolyte. The HGCAC exhibited a joint improvement in capacitance and rate capability, outperforming the commercial coconut shell derived activated carbon (CAC) for supercapacitors.
Article
Chemistry, Physical
H. Saman Khosravi, Qamar Abbas, Klaus Reichmann
Summary: Proton Exchange Membrane Fuel Cell (PEMFC) is a promising technology for generating electricity, but metal-based interconnectors may induce degradation under harsh acidic conditions. Despite the potential of stainless steel interconnectors, the application of surface modification and protective coatings still faces challenges such as low electrical conductivity and high cost.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Cyrille Galven, Valerie Albin, Simon Hubert, Virginie Lair, Armelle Ringuede, Marie-Pierre Crosnier-Lopez, Francoise Le Berre
Summary: Two new acentric oxycarbonates Na6Li4MO4(CO3)(4) (M = W and Mo) with promising potential as electrolytes for electrochemical devices were successfully synthesized. The crystal structures of Na6Li4MO4(CO3)(4) (M = W and Mo) were determined to be acentric cubic P-43m space group. The conductivity of both solid and molten phases showed purely ionic behavior and was comparable to classical molten alkali electrolytes.
INORGANIC CHEMISTRY
(2023)
Review
Chemistry, Physical
Yuyue Zhao, Yunlu Zhang, Ying Wang, Daxian Cao, Xiao Sun, Hongli Zhu
Summary: Carbon-based materials have attracted considerable attention in the field of electrochemical energy storage due to their abundance, environmental friendliness, and excellent chemical stability. Research on advanced and multifunctional carbon materials is focused on improving electrochemical performance. Further development of novel carbon materials may face challenges, but holds promising prospects.
Article
Chemistry, Physical
Lei Wang, Xiaolong Li, Rong Liu, Yuanming Wang, Yang Bai, Yang Liu, Yu Ma, Guohui Yuan, Zaiping Guo
Summary: A novel two-step protonic acid catalysis method has been developed to engineer fast electronic transport channels in oxygen-functionalized carbon materials, enabling high charge storage capability and rapid charge transfer; the resulting functionalized carbon textile features high oxygen content and electrical conductivity, maintaining the integrity of the carbon network while embedding abundant active oxygen functional groups.
Review
Chemistry, Inorganic & Nuclear
P. E. Lokhande, Sahana Kulkarni, Sandip Chakrabarti, H. M. Pathan, Monika Sindhu, Deepak Kumar, Jashanpreet Singh, Anupam Kumar, Yogendra Kumar Mishra, Dana-Cristina Toncu, Mikael Syvajarvi, Ajit Sharma, Ashutosh Tiwari
Summary: The increasing energy demand has led to the search for new smart materials to address the crises in energy generation and storage. Metal-organic frameworks (MOFs) have emerged as efficient porous organic-inorganic structures that can serve as building blocks for synthesizing highly efficient energy materials. Recent advancements in MOF-derived materials have shown impressive performance in energy conversion and storage for supercapacitor electrodes.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Environmental Sciences
F. Boumediene, O. Abdallah, B. Bensebia, V Slovak
Summary: This study focused on using oak and casuarina fruit shell biomass as adsorbents for the removal of copper ions and methylene blue. The highest adsorption capacity was found for activated casuarina for methylene blue and activated oak for copper ions. This research demonstrates that simple biomass-based materials can effectively treat industrial effluents.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zeljko Rapljenovic, Nikolina Novosel, Damir Dominko, Virna Kisicek, David Rivas Gongora, Duro Drobac, Mladen Prester, Denis Vinnik, Liudmila N. Alyabyeva, Boris P. Gorshunov, Tomislav Ivek
Summary: This study presents the frequency-dependent magnetic susceptibility and dc electric transport properties of three different compositions of hexaferrite Ba1-xPbxFe12-yAlyO19 single crystals. The correlation between the activation energies of the dc electric transport and the ac magnetic susceptibility is found to persist over the entire studied range of aluminum substitution y = 0-3.3, pointing toward a general relaxation mechanism in ferrimagnetic semiconductors that directly affects the dynamic magnetic properties via electrical transport.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Madhav P. Chavhan, Vaclav Slovak, Chung-Hsin Lu
Summary: The research revealed the decisive roles of [OH-]/[Ni2+] molar ratios and calcination temperatures in controlling the morphology of NiO nanostructures, leading to the formation of hexagonal nanodisc shapes. Increasing the calcination temperature improved crystallinity but also reduced the BET area and pore volume.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Multidisciplinary Sciences
Tomas Zelenka, Klaudia Simanova, Robin Saini, Gabriela Zelenkova, Satya Pal Nehra, Anshu Sharma, Miroslav Almasi
Summary: The present article studied the influence of post-synthetic modification with ethylenediamine (en, diamine) and diethylenetriamine (deta, triamine) within the coordinatively unsaturated sites (CUSs) of HKUST-1 on carbon dioxide and hydrogen storage. The results showed that the modified samples exhibited high adsorption capacities for carbon dioxide and hydrogen, with deta-modified samples showing higher adsorption amounts compared to en-modified materials.
SCIENTIFIC REPORTS
(2022)
Article
Thermodynamics
Gabriela Zelenkova, Vaclav Slovak
Summary: The quantitative TG-MS method was used to detect and quantify gases evolved during the thermal decomposition of ammonium salts, providing new insights into the decomposition mechanism of inorganic salts. The method was validated in the decomposition of simple compounds and used to determine the decomposition pathways of more complex compounds like ammonium sulphate and ammonium nitrate, showing the importance of such analysis for understanding gas mixtures.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Multidisciplinary
Gabriela Zelenkova, Tomas Zelenka, Miroslav Almasi, Michala Soldanova
Summary: This study investigated the synthesis of hierarchically porous carbon monoliths doped with graphene oxide for H-2 and CO2 sorption applications. By adjusting the synthesis procedure and carbonization temperature, the degree of reduction of graphene oxide and its incorporation into the matrix were characterized. The addition of 10% graphene oxide at a pyrolysis temperature of 900 degrees C resulted in a promising material with high adsorption capacities for H-2 and CO2.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Physical
Lucie Korena, Vaclav Slovak, Gabriela Zelenkova, Tomas Zelenka
Summary: The effects of porosity and particle size on carbon surface oxidation were investigated. Carbon xerogels with different porosity and particle size were prepared and characterized. Isothermal thermogravimetry experiments showed that particle size and porosity significantly influence diffusion and heat transfer during carbon oxidation. The apparent kinetic parameters were determined, and it was found that porosity and particle size do not affect the basic chemical reactions occurring on the carbon surface during oxidation.
Article
Chemistry, Physical
Madhav P. Chavhan, Smruti Ranjan Sethi, Somenath Ganguly
Summary: Porous metal oxide films are prepared on Ni foam through template-assisted electrospray deposition. The addition of Pluronic F127, a triblock organic copolymer surfactant, to the metal acetate sols enables the formation of Ni and Co oxide films. The unique cubic phases and mesomacroporous structure of the metal oxides enhance the accessibility of electrolyte ions, resulting in high specific capacities and specific energy for the NiO and Co3O4 film electrodes.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Polymer Science
Eva Kinnertova, Vaclav Slovak, Roman Marsalek, Martin Mucha
Summary: Different methods were used to study the kinetics and mechanism of resorcinol-formaldehyde (RF) condensation, yielding significantly different results and applicability. Fourier transform infrared spectroscopy (FTIR) can only track the changes in functional groups at the early stages of the reaction. Dynamic light scattering (DLS) can estimate the growth of particles in the reaction solution before it becomes more viscous. H-1 nuclear magnetic resonance relaxometry (H-1-NMR) provides insights into the properties of water present in the polymeric gel during RF condensation. Differential scanning calorimetry (DSC) measurement of the freezing/melting behavior of the reaction mixture has the widest range of applicability. These findings can enhance our understanding of the mechanism of RF condensation.
Article
Thermodynamics
Bara Komarkova, Monika Motlochova, Vaclav Slovak, Petra Ecorchard, Dmytro Bavol, Jan Subrt, Petr Bezdicka
Summary: This study investigates the thermal behavior of nanotitania precursors and the influence of amines and peroxide treatment on TiO2 properties. Results show that peroxide treatment increases initial particle size, while the choice of amine affects the formation temperature of anatase. Additionally, the size of anatase particles has a direct impact on rutile formation temperature.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
