Article
Geochemistry & Geophysics
Chunlin He, Chunhui Zheng, Wei Dai, Toyohisa Fujita, Jian Zhao, Shaojian Ma, Xinsheng Li, Yuezhou Wei, Jinlin Yang, Zongwu Wei
Summary: The phase evolution mechanism and purification of titanium oxycarbide (TiCxOy) synthesized through carbothermal reduction of ilmenite are investigated. The reduction products of TiCxOy involve FeTi2O5, Ti2O3, Fe, TiO, TiCxOy, and TiC under increasing carbon content. Separation and purification of TiCxOy can be achieved under specific conditions.
Article
Materials Science, Multidisciplinary
Fuxing Zhu, Shangrun Ma, Zhanshan Ma, Lihua Qi, Weixing Peng, Kaihua Li, Kehui Qiu
Summary: This study proposes a novel process for preparing TiCl4 from Panzhihua ilmenite, involving acid leaching separation of reduced products and boiling chlorination. The environmentally friendly process avoids the waste of chlorinated salt and can be used to prepare TiCl4.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Jialiang An, Mingyong Wang, Jintao Zhang, Yongzheng Jia, Baoyan Feng, Lei Dai, Shuqiang Jiao
Summary: In this study, VCxO1-x solid solution was successfully synthesized through carbothermal reduction method, and the effects of reaction conditions on the synthesis were investigated. The results showed that VCxO1-x is a continuous solid solution with better thermal stability and oxidation resistance compared to VC. Additionally, VCxO1-x solid solution exhibits high conductivity. This work is significant for the controllable synthesis of VCxO1-x solid solution and its potential applications in energy storage, catalysis, and metallic vanadium preparation.
CERAMICS INTERNATIONAL
(2023)
Review
Materials Science, Ceramics
Anastasia Kucheryavaya, Zoltan Lences, Pavol Sajgalik, Harald Harmuth
Summary: Zirconium oxycarbides and zirconium oxycarbonitrides are high-temperature ceramic materials with excellent properties and potential applications. However, their stoichiometry, synthesis chemistry, and thermodynamics of reactions still need further clarification. This review provides a comprehensive interpretation of data for these materials and summarizes the state-of-the-art synthesis procedures and potential applications.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Hongwei Zhang, Cheng Man, Chaofang Dong, Liwei Wang, Wen Li, Decheng Kong, Li Wang, Xin Wang
Summary: The critical NaF concentrations for both SLM and wrought Ti6Al4V are similar, and the levels of aluminum and fluoride decrease with higher NaF concentrations and pH values. The SLM sample demonstrates significantly worse corrosion resistance compared to the wrought Ti6Al4V in almost all test solutions.
Article
Chemistry, Multidisciplinary
Si-Ming Wu, Yi-Tian Wang, Shi-Tian Xiao, Yan-Xiang Zhang, Ge Tian, Jiang-Bo Chen, Xiao-Fang Zhao, Christoph Janiak, Menny Shalom, Detlef W. Bahnemann, Li-Ying Wang, Xiao-Yu Yang
Summary: Directed transfer of carriers in semiconductors by structural design is challenging but important. In this study, TiO2 nanosheets with interlayered sp(2) carbon and titanium vacancies were obtained, and the directed transfer of carriers from the excited position to Ti-vacancies to interlayered carbon was observed. This greatly increased the charge transport efficiency and resulted in excellent photocatalytic and photoelectrochemical activity, as well as significant lithium/sodium ion storage performance. Theoretical calculations further revealed the mechanism of spatial inside-out cascade electron transfer.
Article
Thermodynamics
Fei Jin, Chao Xu, Jiaxin Xing, Xin Li, Xin Xia, Zhirong Liao
Summary: This study proposes titanium dioxide-based isothermal methanothermal and carbothermal redox cycles as efficient methods for solar fuel production and evaluates them thermodynamically. The results suggest that these cycles have the potential to become competitive routes for solar fuel production.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Materials Science, Multidisciplinary
A. Sotniczuk, J. L. Gilbert, Y. Liu, M. Matczuk, W. Chrominski, D. Kalita, M. Pisarek, H. Garbacz
Summary: In this study, the corrosion behavior of two alloys, Ti-29Nb-13Ta-4.6Zr and Ti-45Nb, with similar amounts of β-phase stabilizers, was compared. The corrosion resistance was analyzed in a PBS+H2O2 solution, simulating post-operative inflammation conditions. The results showed that the Ti-29Nb-13Ta-4.6Zr alloy had significantly higher corrosion resistance compared to Ti-45Nb, as evidenced by electrochemical impedance spectroscopy and ion-release measurements. Microscopic analysis also revealed that a thinner layer of oxidation products was formed on the Ti-29Nb-13Ta-4.6Zr alloy surface. These findings suggest that Nb does not play a beneficial role in tailoring the corrosion resistance of Ti-29Nb-13Ta-4.6Zr under simulated inflammatory conditions.
Article
Materials Science, Multidisciplinary
B. Rahmatian, H. M. Ghasemi, M. Heydarzadeh Sohi, P. De Baets
Summary: TiB2 and TiB double layers were formed on the surface of Ti-6Al-4V through a diffusional process at 850°C for 4-16 hours. The presence of a passive film on the coated samples in a PBS solution was found to increase the corrosion resistance of Ti-6Al-4V. The borided samples exhibited a tribocorrosion rate that was 40 times lower than Ti-6Al-4V under a reciprocating condition and normal loads of 0.5-15 N against an alumina ball. This reduction in tribocorrosion rate can be attributed to the presence of B2O3/H3BO3 tribofilm on the borided samples, which resulted in a lower coefficient of friction and a more stable fluctuation of OCP.
Article
Chemistry, Physical
Aamir Iqbal, Hyerim Kim, Jung-Min Oh, Jikwang Chae, Jiwoong Kim, Myungjae Kim, Tufail Hassan, Zhenguo Gao, Juyun Lee, Seon Joon Kim, Daesin Kim, Yury Gogotsi, Hanjung Kwon, Chong Min Koo
Summary: MXenes are a new class of 2D materials with unique properties, such as metallic conductivity, mechanical flexibility, and surface tunability, making them suitable for various applications. However, synthesizing MXenes with high crystallinity and atomic stoichiometry in a low-cost process has been a challenge due to difficulties in controlling oxygen substitution. In this study, a cost-effective method was developed to synthesize highly crystalline and stoichiometric Ti3C2Tx MXene by controlling excess carbon and high-energy milling time. The resulting MXene showed excellent electrical conductivity and electromagnetic shielding effectiveness. The method has the potential to facilitate large-scale production and accelerate global research on MXenes.
Article
Materials Science, Multidisciplinary
Zhengkai Yang, Yong Zheng, Xiangyu Xu, Guotao Zhang, Zheng Ke, Hao Wu, Chaogang Xue
Summary: A series of Ti(C,N)-based cermets with varying amounts of Mo were fabricated through in-situ carbothermal reduction of TiO2. The addition of Mo significantly impacts the formation of white core grains and rims in the cermets. Cermets with 14 wt % Mo content demonstrate optimal mechanical properties, including fracture toughness, transverse rupture strength, and hardness.
Article
Materials Science, Multidisciplinary
Federica Ceriani, Luca Casanova, Luca Massimini, Andrea Brenna, Marco Ormellese
Summary: This research investigates the influence of two types of particles on the properties of PEO coatings on titanium. The study finds that coatings produced at a specific electrical condition exhibit a thicker and more corrosion-resistant layer, while other treatments affect the structure and performance of the coatings.
Article
Materials Science, Multidisciplinary
Agata Sotniczuk, Witold Chrominski, Boguslawa Adamczyk-Cieslak, Marcin Pisarek, Halina Garbacz
Summary: This study provides insights into the effects of nanostructure and crystallographic texture on Ti corrosion resistance under simulated inflammatory conditions. The development of a basal texture component was found to provide the most advantageous corrosion properties for prolonged immersion in a simulated inflammatory environment.
Article
Chemistry, Multidisciplinary
Xiaodong Wu, Na Yang, Yuanxiao Ji, Xuexia He, Qi Li, Ruibin Jiang, Zhibin Lei, Zonghuai Liu, Jie Sun
Summary: This research investigates the phase transformation from TiO2 to TinO2n-1 and characterizes the phase composition and interface structures of the products at different temperatures using transmission electron microscopy. The crystallographic features of the observed interfaces have been calculated based on modified invariant line theory, confirming the consistency of the experimental observation and calculated results.
Article
Nanoscience & Nanotechnology
Xingqiang Cui, Hong Li, Zhanyuan Yang, Yanhui Li, Pengfei Zhang, Zongmin Zheng, Yuqi Wang, Junru Li, Xiaoping Zhang
Summary: Novel CaIn2S4/TiO2 nanotube arrays heterojunction photoanodes were successfully prepared, exhibiting improved photocathodic protection performance for 316 stainless steel through enhanced separation efficiency of the photogenerated carriers and strong visible light absorption.
Article
Physics, Applied
Gideon Segev, Jakob Kibsgaard, Christopher Hahn, Zhichuan J. Xu, Wen-Hui (Sophia) Cheng, Todd G. Deutsch, Chengxiang Xiang, Jenny Z. Zhang, Leif Hammarstrom, Daniel G. Nocera, Adam Z. Weber, Peter Agbo, Takashi Hisatomi, Frank E. Osterloh, Kazunari Domen, Fatwa F. Abdi, Sophia Haussener, Daniel J. Miller, Shane Ardo, Paul C. McIntyre, Thomas Hannappel, Shu Hu, Harry Atwater, John M. Gregoire, Mehmed Z. Ertem, Ian D. Sharp, Kyoung-Shin Choi, Jae Sung Lee, Osamu Ishitani, Joel W. Ager, Rajiv Ramanujam Prabhakar, Alexis T. Bell, Shannon W. Boettcher, Kylie Vincent, Kazuhiro Takanabe, Vincent Artero, Ryan Napier, Beatriz Roldan Cuenya, Marc T. M. Koper, Roel Van de Krol, Frances Houle
Summary: The performance of solar fuel generation devices has made progress, but still faces many scientific and engineering challenges. There is a need to significantly improve conversion efficiency, stability, and product selectivity at the electrode and device level. Additionally, maintaining these performance metrics while scaling up devices and systems and controlling costs and carbon footprint is crucial. This roadmap surveys various aspects of solar fuel generation, highlighting the current state of the art, key challenges, and advancements required to meet them. It can serve as a guide for researchers and funding agencies in addressing the most pressing needs of the field.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Haiyang Hu, Thomas Weber, Oliver Bienek, Alwin Wester, Ludwig Huettenhofer, Ian D. Sharp, Stefan A. Maier, Andreas Tittl, Emiliano Cortes
Summary: We have developed an ultrathin catalytic metasurface platform that utilizes loss-engineered substoichiometric titanium oxide and the physical concept of optical bound states in the continuum to enhance photocatalytic activity and provide broad spectral tunability. This platform has broad applications beyond photocatalysis, including photovoltaics and photodetectors.
Article
Chemistry, Multidisciplinary
Shangpu Liu, Markus W. Heindl, Natalie Fehn, Sebastian Caicedo-Davila, Lissa Eyre, Silva Maria Kronawitter, Jonathan Zerhoch, Stanislav Bodnar, Andrii Shcherbakov, Anna Stadlbauer, Gregor Kieslich, Ian D. Sharp, David A. Egger, Aras Kartouzian, Felix Deschler
Summary: In this study, chiral organic molecules were introduced into bismuth-based lead-free structures to synthesize chiral lead-free crystals and thin films. The crystal and electronic band structures were identified through experiments and calculations. The materials showed optical properties and circular dichroism which can be tuned by the bromide-iodide ratio. The study also revealed long-lived excitations with optically induced chirality memory. This research opens up new possibilities for the discovery of high-performance, lead-free spintronic materials with chiroptical functionalities.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Christoph W. Thurner, Nicolas Bonmassar, Daniel Winkler, Leander Haug, Kevin Plover, Parastoo Delir Kheyrollahi Nezhad, Xaver Drexler, Asghar Mohammadi, Peter A. van Aken, Julia Kunze-Liebhaeuser, Aligholi Niaei, Johannes Bernardi, Bernhard Kloetzer, Simon Penner
Summary: In this study, we compared the beneficial role of Cu/perovskite and CuyPdx/perovskite interfaces in NO + CO reaction using pure and Pd-doped LaCuxMn1-xO3 perovskite catalysts. We found that the oxygen-deficient perovskite interface provided efficient NO activation sites in contact with surface-bound monometallic Cu and bimetallic CuPd nanoparticles, leading to enhanced activity and N-2 selectivity. Our findings suggest that intelligent Cu/perovskite interfacial design is a prerequisite for replacing noble metals with equally potent metal-mixed-oxide interfaces.
Article
Materials Science, Multidisciplinary
Markus W. Heindl, Tim Kodalle, Natalie Fehn, Lennart K. Reb, Shangpu Liu, Constantin Harder, Maged Abdelsamie, Lissa Eyre, Ian D. Sharp, Stephan Roth, Peter Mueller-Buschbaum, Aras Kartouzian, Carolin M. Sutter-Fella, Felix Deschler
Summary: Introducing enantiomerically-pure 3-aminobutyric acid into thin films of the semiconductor dimethylammonium lead iodide results in strong circular dichroism. Molecular-scale insights into the chirality transfer mechanism are gained through X-ray techniques. It is demonstrated that the CD signal strength can be controlled by the amino-acid content and the crystallite surface area.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Matthias Kuhl, Alex Henning, Lukas Haller, Laura Wagner, Chang-Ming Jiang, Verena Streibel, Ian D. Sharp, Johanna Eichhorn
Summary: Plasma-enhanced atomic layer deposition can be used to tune the structure and properties of cobalt hydroxide films by controlling the plasma exposure time and power. Short exposure times and low powers result in highly porous and catalytically active films with poor electrochemical stability, while long exposure times and high powers improve crystallinity and electrochemical stability but reduce catalytic activity. By using the former as the surface layer and the latter as the interface layer, bilayer films with both high catalytic activity and electrochemical stability can be obtained.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Physical
Daniel Hauser, Christoph Griesser, Eva-Maria Wernig, Thomas Goetsch, Johannes Bernardi, Julia Kunze-Liebhaeuser, Simon Penner
Summary: This study investigates the effect of varying key reaction parameters on the stoichiometry of zirconium oxy-carbide films prepared by reactive magnetron sputtering. The composition of the films was confirmed by depth profiling X-ray photoelectron spectroscopy and electron microscopy analysis. The study also demonstrates the formation of well-defined metal/oxy-carbide interfaces by embedding ordered Cu particles in zirconium oxy-carbide matrices.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Min Wang, Anna Loiudice, Valery Okatenko, Ian D. D. Sharp, Raffaella Buonsanti
Summary: The coupling of CO-generating molecular catalysts with copper electrodes in tandem schemes is a promising strategy to boost the formation of multi-carbon products in the electrocatalytic reduction of CO2. The spatial distribution of the two components in molecular-based tandem systems has not been well explored. This study examines the importance of the relative spatial distribution of Co-phthalocyanine (CoPc) and Cu nanocubes (Cu-cub) on the performance of tandem catalysts. It is found that a direct contact between the CO-generating molecular catalyst and the Cu is crucial for promoting C-C coupling, indicating a surface transport mechanism between the two components of the tandem catalyst.
Article
Chemistry, Multidisciplinary
Alex Henning, Johannes D. Bartl, Lukas Wolz, Maximilian Christis, Felix Rauh, Michele Bissolo, Theresa Grunleitner, Johanna Eichhorn, Patrick Zeller, Matteo Amati, Luca Gregoratti, Jonathan J. Finley, Bernhard Rieger, Martin Stutzmann, Ian D. Sharp
Summary: Atomic layer deposition (ALD) is a crucial technique for scaling semiconductor devices, but achieving atomically-defined coatings and surface modifications is challenging. This study presents a method for depositing sub-nanometer thin and continuous aluminum oxide (AlOx) coatings on silicon substrates, allowing spatial control of surface charge density and interface energetics. Using trimethylaluminum and remote hydrogen plasma, silicon dioxide (SiO2) is transformed into alumina. The resulting patterned surfaces possess lateral AlOx/SiO2 interfaces with precise step heights and surface potential steps, enabling modulation of surface band bending.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Andrii Shcherbakov, Kevin Synnatschke, Stanislav Bodnar, Jonathan Zerhoch, Lissa Eyre, Felix Rauh, Markus W. Heindl, Shangpu Liu, Jan Konecny, Ian D. Sharp, Zdenek Sofer, Claudia Backes, Felix Deschler
Summary: Layered van der Waals (vdW) antiferromagnets with low-dimensional excitonic properties and complex spin-structure are promising materials for future opto-spintronic applications. In this study, we successfully fabricated centimeter-scale thin films of the 2D antiferromagnetic material NiPS3 using liquid phase exfoliation. The films showed antiferromagnetic spin arrangement, spin-entangled Zhang-Rice multiplet excitons, and ultranarrow emission line widths, despite their disordered nature. These results demonstrate the scalable thin-film fabrication of high-quality NiPS3, which is crucial for utilizing this material in spintronic and nanoscale memory devices and exploring its complex spin-light coupled states.
Article
Chemistry, Physical
Pan Ding, Hongyu An, Philipp Zellner, Tianfu Guan, Jianyong Gao, Peter Mueller-Buschbaum, Bert M. Weckhuysen, Ward van der Stam, Ian D. Sharp
Summary: This study investigates the impact of catalyst ink formulation on CO2 electrolysis and finds that Nafion is essential for achieving stable product distributions. The content of Nafion and the solvent composition regulate the internal structure of Nafion coatings and the catalyst morphology, thus significantly impacting CO2 electrolysis performance.
Article
Chemistry, Multidisciplinary
Alex Henning, Sergej Levashov, Chenjiang Qian, Theresa Gruenleitner, Julian Primbs, Jonathan J. Finley, Ian D. Sharp
Summary: It is demonstrated that in situ spectroscopic ellipsometry (SE) is a powerful method for optimizing film growth and opto(electronic) characteristics of 2D materials during atomic layer deposition (ALD). By utilizing in situ SE during ALD on monolayer MoS2, a low temperature process for encapsulating the 2D material with a nanometer-thin alumina (AlOx) layer is investigated, which results in a 2D/3D interface controlled by van der Waals interactions. The charge transfer doping of MoS2 by AlOx is found to be an interfacial phenomenon that initiates from the earliest stages of film formation.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Instruments & Instrumentation
F. Rauh, O. Bienek, I. D. Sharp, M. Stutzmann
Summary: The necessity for higher sample throughput has led to an increase in the use of robotic systems and automation in sample preparation processes. This study presents a low-cost alternative to commercial dip coaters by using a readily available 3D printer and compares the resulting films to those obtained from a commercial device. The 3D printer-based device allows for automated dip coating processes using multiple dipping solutions for a batch of samples, potentially saving time and cost compared to commercial systems. The film quality achieved by the home-built system is comparable, and sometimes even better in terms of uniformity and roughness, making it a viable alternative to commercial dip coating devices.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Nanoscience & Nanotechnology
Oliver Bienek, Benedikt Fuchs, Matthias Kuhl, Tim Rieth, Julius Kuhne, Laura I. Wagner, Lina M. Todenhagen, Lukas Wolz, Alex Henning, Ian D. Sharp
Summary: III-V compound semiconductors have optoelectronic properties suitable for solar energy conversion. This study investigates the impact of defects in atomic layer deposition of titanium oxide (TiOx) on junction formation, interfacial charge transport, and photocarrier recombination. The results show that defect concentrations in TiOx can be controlled to modulate optical constants, electrical conductivity, and interface chemistry, allowing for tuning of junction formation and achieving high photovoltage photocathodes.
Article
Green & Sustainable Science & Technology
Lukas Szabados, Daniel Winkler, David Stock, Thoeny Alexander, Thomas Loerting, Julia Kunze-Liebhaeuser, Engelbert Portenkirchner
Summary: In sodium-ion storage, titanium dioxide nanotubes (NTs) show excellent self-improving sodiation rate capabilities and high capacity retention by forming an acicular surface film for sodium-ion storage. This self-improving behavior has also been observed on other metal oxide surfaces.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(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)
