Article
Electrochemistry
Aryal Krishna Prasad, Jong-Young Park, Soon-Hyung Kang, Kwang-Soon Ahn
Summary: The study prepared a W-V mixed metal oxide composite thin-film structure comprising WO3 and V2O5, which showed remarkable performance in both electrochromic and electrochemical energy storage applications, such as fast coloration response and high capacitance.
ELECTROCHIMICA ACTA
(2022)
Article
Energy & Fuels
Jiawei Sun, Xinyi Wan, Ting Yang, Dongyun Ma, Jinmin Wang
Summary: In order to achieve better environmental sustainable development, the construction and new energy vehicle industries are focusing on electrochromic (EC) materials that can regulate light and heat. This study reports the successful synthesis of high-performance tungsten-niobium (W-Nb) bimetallic oxide films for EC applications. The films exhibit large optical modulations in visible and near-infrared light regions, as well as high average coloration efficiency. The solvothermal preparation method provides a platform for exploring the EC properties of bimetallic oxide films with different W to Nb atomic ratios.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Multidisciplinary
Aryal Krishna Prasad, Jong -Young Park, Hui Yeong Jung, Je Woo Kang, Soon-Hyung Kang, Kwang-Soon Ahn
Summary: A thin film of nickel-intermixed tungsten oxide (Ni-WO3) composite was fabricated using a simple one-step electrochemical deposition method. The composite film exhibited enhanced electrochromic energy storage properties compared to the individual Ni(OH)2 and WO3 thin films. The improved performance was attributed to the crosslinked and deagglomerated surface of the composite film, which enhanced the electrochemically active surface area and charge transfer kinetics. The Ni-WO3 thin film showed high coloration efficiency, optimum optical contrast, fast coloration response, and excellent capacitance retention.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
S. Ktifa, M. Rahmani
Summary: This work investigates the morphology and optical properties of vanadium pentoxide (V2O5) nanoparticles deposited on silicon nanowires (SiNWs). SiNWs are obtained by metal-assisted chemical etching (MACE) method. The deposition of V2O5 on SiNWs is done using a vacuum thermal evaporation system for different durations. Snowball-like V2O5 nanoparticles are observed on the SiNWs surface, with increased condensation of V2O5 elements over longer evaporation durations. Raman and Fourier transform infrared (FTIR) spectroscopies analyze the changes in bonds and chemical composition of the SiNWs-V2O5 nanocomposites. X-ray Diffraction (XRD) technique confirms the orthorhombic structure of the V2O5 layer. SiNWs-V2O5 composites exhibit strong emission in the visible range due to radiative band edge transitions of V2O5, leading to an increased photoluminescence (PL) intensity similar to that of SiNWs. The optical band gap (Eog) increases from 1.851 to 2.075 eV with the presence of V2O5 on the SiNWs surface, attributed to the Burstein-Moss effect.
Article
Nanoscience & Nanotechnology
R. Colby Evans, Rachelle Austin, Rebecca C. Miller, Alexander Preston, Zach N. Nilsson, Kaka Ma, Justin B. Sambur
Summary: The influence of nanoparticle surface facets on the electrochromic properties of hexagonal WO3 nanorod thin films was explored in this study. It was found that different surface facets exhibited distinct electrochemical and optical properties, affecting the optical switching and stability differently. This suggests that surface facet and particle morphology engineering can be viable strategies to enhance the performance and stability of electrochromic thin films for smart window applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Haohao Sun, Wenxuan Wang, Qiongzhen Fan, Yanyuan Qi, Yuli Xiong, Zelang Jian, Wen Chen
Summary: In this study, one-dimensional V2O5 nanobelts were synthesized using a facile water-assisted strategy. The V2O5 nanobelts exhibited an expanded layered structure and showed great potential for application in electrochromic materials.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Jin-Long Wang, Jian-Wei Liu, Si-Zhe Sheng, Zhen He, Jie Gao, Shu-Hong Yu
Summary: By coassembling W18O49 and V2O5 nanowires, a novel multicolor electrochromic device is demonstrated, which shows dynamic color change upon application of different electrochemical biases. The transparency and color of the device can be easily controlled by manipulating the layers and ratios of coassembled nanowires, allowing for the fabrication of different patterns with corresponding masks. This solid electrochromic device assembled from nanowires has significant potentials in smart windows and multicolor electrochromic displays.
Article
Chemistry, Multidisciplinary
Vu Hong Vinh Quy, In-Rok Jo, Soon-Hyung Kang, Kwang-Soon Ahn
Summary: A facile one-step pulsed-voltage electrodeposition method is utilized to prepare nanoporous amorphous-crystalline dual-phase tungsten trioxide thin films with superior electrochemical and electrochromic properties. The films exhibit excellent cycling stability and longer coloration retention compared to conventional amorphous WO3 films.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Materials Science, Ceramics
B. Dey, R. Narzary, Sushree Nibedita Rout, Manoranjan Kar, S. Ravi, S. K. Srivastava
Summary: In this research, a conventional solid-state synthesis method was used to successfully synthesize polycrystalline magnesium-doped zinc oxide compounds. The synthesized compounds exhibited a single hexagonal phase structure. Scanning electron microscopy analysis showed that the compounds were composed of microscopic spherical particles with sizes ranging from 1 to 3 μm. Raman scattering spectra indicated successful substitution of magnesium ions into the zinc oxide lattice. Optical measurements revealed an increased optical band gap and transmittance with increasing magnesium doping percentage. The magnetization measurements revealed strong ferromagnetism in all the magnesium-doped compounds, with the highest saturation magnetization observed in the 12% magnesium-doped sample.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Kunrun Song, Shichen Weng, Jumei Zhou, Ran Jiang, Hongtao Cao, Hongliang Zhang
Summary: Aluminum tungsten bronze (AlxWO3) is of great significance to electrochromic devices as the core layer for optical modulation. The study of optical constants of AlxWO3 remains incomplete compared to other electrochromic properties. In this study, the tunable optical constants of AlxWO3 layers under varying potentials were investigated, revealing that AlxWO3 exhibits greater modulation capability and a more extensive modulation voltage range than HxWO3 and LixWO3.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Cosmin Romanitan, Ioan Valentin Tudose, Kyriakos Mouratis, Marian Catalin Popescu, Cristina Pachiu, Stelios Couris, Emmanouel Koudoumas, Mirela Suchea
Summary: This study reports the correlation between texture coefficient and electrochromism in vanadium pentoxide nanostructured films. It is found that texture coefficient affects the size of crystalline domains and electrochromic performance, with high texture coefficient facilitating charge insertion and increasing transmittance contrast.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
K. Naveen Kumar, Habibuddin Shaik, V Madhavi, R. Imran Jafri, Jyothi Gupta, G. Nithya, Sheik Abdul Sattar, G. V. Ashok Reddy
Summary: This study investigates the characteristics of tungsten oxide thin films grown using the GLAD technique at different substrate angles. The results show that the films have an amorphous structure, with columnar growth and surface porosity. As the GLAD angle increases, the optical transmittance and bandgap of the films decrease. The study also reveals that the GLAD angle influences the coloration efficiency and diffusion coefficient.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Crystallography
Kai Guo, Wenchong Cheng, Haiyuan Liu, Wenhao She, Yinpeng Wan, Heng Wang, Hanbin Li, Zidan Li, Xing Zhong, Jinbo Ouyang, Neng Yu
Summary: This study develops water molecules and Sn co-doped hydrated V2O5 as a cathode material for zinc-ion batteries, showing remarkable electrochemical performance including high specific capacity, exceptional rate capability, and excellent cycling life. This is attributed to faster charge transfer kinetics and enhanced crystalline framework.
Article
Energy & Fuels
Tien-Chai Lin, Bai-Jhong Jheng, Wen-Chang Huang
Summary: The electrochromic properties and charge storage capacity of nickel-doped vanadium pentoxide film have been improved with the increase of nickel doping, with the film structure transitioning from V2O5 dominant to NiO dominant. The Ni-doped film shows enhanced transmittance difference and charge storage capacity compared to pure V2O5 films.
Article
Electrochemistry
Chihoon Kim, Vaibhav Lokhande, Daehan Youn, Taeksoo Ji
Summary: In this study, the electrochromic behavior of tungsten oxide (WO3) and the effect of hafnium (Hf) doping on its performance were analyzed. It was found that the Hf-doped WO3 outperformed the pristine WO3, with the 7% doped sample showing the best results. The performance was also affected by the electrolyte used, with the Hf-doped WO3 exhibiting the highest optical contrast, fastest switching speed, and highest coloration efficiency in the calcium electrolyte. A device fabricated from the 7% Hf-doped WO3 showed fast switching and excellent stability, demonstrating the practical applicability of the Hf-doped WO3/Ca electrolyte electrochromic system.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2022)
Article
Energy & Fuels
Christina Floraki, Antonis Sapountzis, Dimitra Vernardou
Summary: Lithium-ion batteries with composite electrodes based on graphene have advantages of low cost, high safety, and good performance. Chemical vapor deposition has been used to overcome electrode issues for large-scale deployment. This mini review summarizes the synthetic strategies of graphene-based composite electrodes and their potential applications.
Article
Materials Science, Multidisciplinary
Cosmin Romanitan, Ioan Valentin Tudose, Kyriakos Mouratis, Marian Catalin Popescu, Cristina Pachiu, Stelios Couris, Emmanouel Koudoumas, Mirela Suchea
Summary: This study reports the correlation between texture coefficient and electrochromism in vanadium pentoxide nanostructured films. It is found that texture coefficient affects the size of crystalline domains and electrochromic performance, with high texture coefficient facilitating charge insertion and increasing transmittance contrast.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Review
Materials Science, Multidisciplinary
Top Khac Le, Phuong Pham, Chung-Li Dong, Naoufal Bahlawane, Dimitra Vernardou, Issam Mjejri, Aline Rougier, Sok Won Kim
Summary: This review comprehensively analyzes the recent advances and applications of V2O5 as a smart multifunctional oxide for energy-saving and energy-storage. The unique electronic structure of V2O5 triggers peculiar smart optical properties and multi-color appearance. The review emphasizes the advantages, drawbacks, and potential applications of chromism in V2O5, and discusses strategies to enhance the coloration performances of V2O5 chromogenic devices. The challenges in commercializing V2O5-based applied research are also addressed.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Michalis Stavrou, Aristeidis Stathis, Ioannis Papadakis, Alina Lyuleeva-Husemann, Emmanouel Koudoumas, Stelios Couris
Summary: This study reports on the transient nonlinear optical responses of two different types of 2D silicon nanosheets. The results demonstrate the importance of chemical functionalization for the efficient enhancement and tailoring of the NLO properties of these Si-based materials, and reveal that the silicon nanosheets exhibit larger NLO responses compared to graphene nanosheets.
Article
Engineering, Electrical & Electronic
P. Bousoulas, C. Tsioustas, J. Hadfield, V Aslanidis, S. Limberopoulos, D. Tsoukalas
Summary: This paper presents a novel threshold switching memristor using SiO2-based CBRAM and Pt nanoparticles as a bottom electrode, which enables robust stochastic neuron activity. The probabilistic leaky-integrate-and-fire neuron properties and tunable integrate-and-fire properties were achieved using a simple PC circuit and stand-alone threshold switching elements, respectively.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Materials Science, Multidisciplinary
Volodymyr Khomenko, Oksana Butenko, Oksana Chernysh, Viacheslav Barsukov, Mirela Petruta Suchea, Emmanouel Koudoumas
Summary: This work focuses on the development of paint-like composites composed of carbon materials and magnetite in a polyvinyl butyral matrix. The study investigates the dependence of the composite's electromagnetic shielding properties on electrical characteristics and frequency. It is found that a high content of carbon components and the absence of filler particle agglomeration are crucial for achieving high electromagnetic shielding effectiveness. Additionally, a combination of carbon-graphite materials and magnetite fillers enhances shielding efficiency.
Review
Computer Science, Information Systems
Theodoros Panagiotis Chatzinikolaou, Iosif-Angelos Fyrigos, Vasileios Ntinas, Stavros Kitsios, Michail-Antisthenis Tsompanas, Panagiotis Bousoulas, Dimitris Tsoukalas, Andrew Adamatzky, Georgios Ch Sirakoulis
Summary: This paper studies the inspiration from wave-based computing on chemical media towards the implementation of equivalent systems on oscillating memristive circuits. By developing electrical circuits that imitate the dynamics of chemical computers, the non-linear behavior of the chemical systems can be facilitated.
Article
Physics, Applied
P. Bousoulas, Ch Tsioustas, D. Tsoukalas
Summary: In this work, an artificial nociceptive element that can emulate the properties of biological nociceptors is proposed. The device has low power consumption, scalability, and operates under low voltage with fast switching. The impact of the electrode material's local temperature distribution on the device's memory performance and switching dynamics is studied through experiments and numerical simulations.
APPLIED PHYSICS LETTERS
(2022)
Review
Physics, Applied
Panagiotis Bousoulas, Stavros Kitsios, Theodoros Panagiotis Chatzinikolaou, Iosif-Angelos Fyrigos, Vasileios Ntinas, Michail-Antisthenis Tsompanas, Georgios Ch Sirakoulis, Dimitris Tsoukalas
Summary: This review focuses on the use of resistive switching memories, such as valence change memories or conductive bridge memories, to emulate neuromorphic characteristics. The impact of device structure and the incorporation of Pt nanoparticles are thoroughly investigated. The experiments demonstrate that these devices possess the ability to emulate various artificial synaptic functionalities, while operating with low power consumption and exhibiting biological-like behavior. This approach provides valuable insights for the development of multifunctional synaptic elements.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Ioan Valentin Tudose, Kyriakos Mouratis, Octavian Narcis Ionescu, Cosmin Romanitan, Cristina Pachiu, Oana Tutunaru-Brincoveanu, Mirela Petruta Suchea, Emmanouel Koudoumas
Summary: This study fabricates graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (CNTs)-polypropylene (PP) composite materials for electromagnetic interference (EMI) shielding applications. The obtained composite materials are not simple physical mixtures of these components but new materials with particular properties, with the filler concentration and nature affecting the nanomaterials' structure and their conductivity. The characteristics of GNPs have a significant effect on their functionality, leading to composites with lower conductivity and less effective EMI shielding. The CNTs-PP composite panels exhibit excellent EMI attenuation when the CNTs concentration is at 10%.
Article
Materials Science, Multidisciplinary
Charalampos Papakonstantinopoulos, Panagiotis Bousoulas, Evangelos Aslanidis, Evangelos Skotadis, Menelaos Tsigkourakos, Dimitris Tsoukalas
Summary: The development of high-performance sensors that can mimic the human skin's response to external mechanical stimuli is becoming increasingly important in the era of artificial intelligence and robotics. In this study, an incredibly sensitive resistive stretchable sensor was demonstrated, achieving a gauge factor of around 10^7. The sensor was made using a polydimethylsiloxane (PDMS) substrate decorated with Pt nanoparticles as the stretch-sensitive medium placed between two Ag electrodes. By connecting the sensor in a parallel circuit configuration with a SiO2-based conductive-bridge memory, the functionality of a biological mechanoreceptor was emulated.
FLEXIBLE AND PRINTED ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
G. Kleitsiotis, P. Bousoulas, C. Tsioustas, D. Tsoukalas
Summary: The synaptic properties of a SiO2-based CBRAM were investigated in this study. A numerical model was used to interpret the synaptic pattern and validated with experimental data. An artificial afferent nerve concept, consisting of a piezoelectric sensory receptor, microcontroller, and CBRAM element, was demonstrated to process electrical signals from external stimuli. The synaptic adaptation and memory consolidation processes were recorded and analyzed.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Green & Sustainable Science & Technology
Iliana Dompara, Angeliki Maragkaki, Nikolaos Papastefanakis, Christina Floraki, Dimitra Vernardou, Thrassyvoulos Manios
Summary: One of the best methods for converting different types of biomass into clean energy is anaerobic digestion (AD), and inorganic additives, such as TiO2 and ZnO/Ag powders, have been found to improve its efficiency. This study focuses on the impact of these powders on AD and found that the addition of ZnO/Ag improved biogas yield by 12% and TiO2 by 44% compared to the control reactor. It also observed increased removal efficiency of volatile solids and total chemical oxygen demand.
Article
Chemistry, Analytical
Myrto Kyriaki Filippidou, Aris Ioannis Kanaris, Evangelos Aslanidis, Annita Rapesi, Dimitra Tsounidi, Sotirios Ntouskas, Evangelos Skotadis, George Tsekenis, Dimitris Tsoukalas, Angeliki Tserepi, Stavros Chatzandroulis
Summary: The presence of heavy metal ions in soil, air and water is a significant global environmental threat, contributing to the rise of chronic diseases. Efforts have been made to detect these ions, but there is a need for sensitive, low-cost, and portable devices for on-site detection. In this study, we combine microfluidic technology and electrochemical sensing in a plastic chip to selectively detect heavy metal ions using DNAzymes immobilized between platinum nanoparticles (PtNPs), providing a reliable portable solution for water pollution monitoring. A fast and easy fabrication method based on the photolithography of dry photosensitive layers is proposed for the realization of the microfluidic-based detection device. Pb2+ ions detection is demonstrated as a proof of concept using the prototype microfluidic device.
Proceedings Paper
Engineering, Electrical & Electronic
Theodoros Panagiotis Chatzinikolaou, Iosif-Angelos Fyrigos, Vasileios Ntinas, Stavros Kitsios, Panagiotis Bousoulas, Michail-Antisthenis Tsompanas, Dimitris Tsoukalas, Andrew Adamatzky, Georgios Ch Sirakoulis
Summary: Unconventional computing systems, such as chemical computers, encode reactants' concentrations as information and use wave-front propagation for computation. In this study, a digital twin based on a memristor oscillator was developed and tested to mimic the computational abilities of a chemical system. The results of the electrical system align well with simulation and experimental data from the chemical medium.
2022 IEEE 13TH LATIN AMERICAN SYMPOSIUM ON CIRCUITS AND SYSTEMS (LASCAS)
(2022)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)
