Article
Chemistry, Multidisciplinary
Qianru Chen, Yuanyuan Li, Yahua Liu, Pan Sun, Zhengjin Yang, Tongwen Xu
Summary: Research has shown that BQH-Fc, with the lowest LUMO density on iron, exhibits the highest stability and energy storage efficiency in aqueous organic flow batteries, reducing capacity fading. Through experiments and density functional theory calculations, a method has been successfully established to predict the water solubility of ferrocene molecules.
Article
Chemistry, Physical
Oliver Nolte, Philip Rohland, Nico Ueberschaar, Martin D. Hager, Ulrich S. Schubert
Summary: This study investigates the fade rate of N,N,N-2,2,6,6-heptamethylpiperidinyloxy-4-ammonium chloride (TMA-TEMPO) in correlation with temperature and time through battery experiments. The main cause of capacity decay is the deactivation of the oxidized TMA-TEMPO. The results provide insights for the development of a use-oriented cycling program.
JOURNAL OF POWER SOURCES
(2022)
Article
Engineering, Environmental
D. M. Ajiboye, J. W. Kimball, R. G. Landers, J. Park
Summary: In this study, an efficient and fast model using the high-order Chebyshev spectral method was developed to capture capacity fade in lithium-ion batteries. The model accurately predicted degradation over extended cycles and showed great potential in advanced battery management systems.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Antonio Garcia, Javier Monsalve-Serrano, Santiago Martinez-Boggio, Diego Golke
Summary: The 2035 European Union ban on internal combustion engines promotes the adoption of alternative propulsion technologies in the transport industry, particularly electric vehicles with lithium-ion batteries. However, challenges such as battery deterioration, charging times, and safety must be addressed to develop a sustainable and mature technology. This study compares two cathode chemistries, Lithium Ferrum Phosphate and Nickel Manganese Cobalt, for their cell performance and ageing characteristics.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Chemistry, Multidisciplinary
Xiaofan Shen, Xiaona Wang, Yurong Zhou, Yanhong Shi, Liming Zhao, Hehua Jin, Jiangtao Di, Qingwen Li
Summary: The research achieved high durability and energy density in rechargeable Zn-MnO2 batteries by adjusting Mn2+ concentration and utilizing a 3D carbon nanotube foam skeleton. This approach enabled a reversible MnO2/Mn2+ redox conversion and resulted in a battery with extremely high durability, high energy density, and high-rate capacity.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Environmental
Huizhen Lv, Yu Song, Zengming Qin, Mingyue Zhang, Duo Yang, Qing Pan, Zhihui Wang, Xinjian Mu, Jianming Meng, Xiaoqi Sun, Xiao-Xia Liu
Summary: The unwanted disproportionation of Jahn-Teller (J-T) active manganese oxides (Mn3+) is utilized to achieve effective MnO2/Mn2+ transformation, resulting in high specific capacity and good cycling stability in Zn-MnO2 hybrid batteries. Mechanistic studies reveal the sequential processes of charging, discharging, and dissolution, providing insights into the controversial mechanisms of Zn-MnO2 batteries with mild aqueous electrolytes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Zengjia Guo, Yang Wang, Siyuan Zhao, Tianshou Zhao, Meng Ni
Summary: This research proposes a novel multi-physics model for battery thermal management system (BTMS) design and optimization. An optimization framework is developed using numerical simulations, artificial intelligence, and multi-objective genetic algorithm. It is found that BTMS is inadequate in addressing thermal issues in aged battery packs, and optimizing mini-channel parameters and nanoparticle volume fraction can effectively control battery thermal problems. However, reducing battery temperature leads to a reduction in battery average potential. Multivariable global optimizations are conducted to find trade-offs between battery thermal behavior, pressure loss, and electrochemical performance. The obtained optimization schemes can meet temperature requirements during long-term operation and can be tailored for specific engineering applications.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Green & Sustainable Science & Technology
Misgina Tilahun Tsehaye, Gael Mourouga, Thomas J. Schmidt, Juergen O. Schumacher, Svetlozar Velizarov, Bart Van der Bruggen, Fannie Alloin, Cristina Iojoiu
Summary: Aqueous organic redox-flow batteries (AORFBs) are a promising solution for grid-scale energy storage due to their long lifetime, safety, flexibility, potential low costs, and environmental friendliness. Membranes play a crucial role in AORFBs as they impact the battery's resistance, power density, depth-of-discharge, lifetime, and levelized cost of storage. This article critically discusses the current literature on AORFB membranes, including theories for ion and species transport, experimental correlations between membrane properties and cell performance, strategies to improve performance and lower costs, remaining challenges, and future research directions.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Review
Chemistry, Multidisciplinary
Yu Ren, Haoyu Li, Yuan Rao, Haoshen Zhou, Shaohua Guo
Summary: Rechargeable aqueous MnO2-based batteries have gained extensive attention due to their low cost, high safety, and competitive specific capacity. However, the complexity in the reaction mechanism and capacity evolution caused by MnO2 dissolution/deposition chemistry poses challenges for commercial applications. Batteries driven by exclusive MnO2 dissolution/deposition reaction offer high energy density and desirable theoretical potential, but face several key challenges.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Review
Chemistry, Applied
Tong Xue, Hong Jin Fan
Summary: AZIB is an attractive technology due to its low cost, high safety, and eco-friendliness. Recent studies have shown significant performance enhancement through revamping of the electrochemistry and redesigning of the electrolyte and interface. The Zn-MnO2 electrolytic mechanism shows great promise for large-scale static energy storage.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Thermodynamics
Peyman Gholamali Zadeh, Ehsan Gholamalizadeh, Yijun Wang, Jae Dong Chung
Summary: Battery capacity fade analysis was conducted to evaluate the impact of different battery thermal management systems. The results showed that temperature limit had the least negative impact on battery life, while high temperature led to significant capacity fade. PCM provided a more uniform temperature distribution, but required additional heat dissipation mechanism. PCM combined with liquid cooling channels can meet the temperature requirements and enhance the performance of the battery heat management system.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Electrochemistry
Claudina X. Kolesnichenko, Harry D. Pratt, Leo J. Small, Travis M. Anderson
Summary: Metal-based non-aqueous redox flow batteries have the potential for long-term energy storage. By using metal-free bipyridinium materials as anolytes and corresponding iron coordination complexes as catholytes, the stability issue of ligand shedding in metal coordination complexes during reduction can be addressed. Functionalized bipyridinium compounds show good battery performance and cycling stability.
Article
Chemistry, Physical
Chong Bai, Kang Ji, Shuxuan Feng, Jiaxue Zhang, Desheng Kong
Summary: This study introduces a low-cost and scalable method for creating an intrinsically stretchable aqueous battery. The battery exhibits excellent mechanical stretchability and electrochemical stability. A stretchable Zn-MnO2 battery was successfully assembled, demonstrating high specific capacity, good capacity retention, large stretchability, and durability against repetitive mechanical deformations. The research also showcases the practical suitability of stretchable batteries in wearable electronic devices.
ENERGY STORAGE MATERIALS
(2022)
Article
Electrochemistry
Claudina X. Kolesnichenko, Travis M. Anderson, Leo J. Small, Harry D. Pratt
Summary: Metal-based non-aqueous redox flow batteries face stability challenges. This study explores the use of metal-free bipyridinium compounds as anolytes, functionalized for increased electrochemical stability, achieving good battery performance and cycling stability.
Article
Chemistry, Physical
Ehsan Faegh, Benjamin Ng, Brian Lenhart, Saheed Lateef, William E. Mustain
Summary: This study investigates the partial deployment of Al in Zn anodes to enhance the discharge capacity and energy density of Zn-MnO2 alkaline batteries. The results show that partial Al inclusion significantly improves the capacity of the batteries, reaching 581 mAh g(anode)(-1) (approximately 784 Wh kg(anode)(-1)) at C/20, and excellent cycle performance was observed over 800 hours in secondary full cells.
JOURNAL OF POWER SOURCES
(2021)
Article
Green & Sustainable Science & Technology
Tondepu Subbaiah, Ponnam Vijetha, Barsha Marandi, Kali Sanjay, Manickam Minakshi
Summary: Current density is crucial in electrorefining cells, and by using turbulence promoters and adjusting flow rate, mass transfer coefficient and overall efficiency can be improved.
Article
Multidisciplinary Sciences
Abdulhakim Bake, Md Rezoanur Rahman, Peter J. Evans, Michael Cortie, Mitchell Nancarrow, Radu Abrudan, Florin Radu, Yury Khaydukov, Grace Causer, Karen L. Livesey, Sara Callori, David R. G. Mitchell, Zeljko Pastuovic, Xiaolin Wang, David Cortie
Summary: This article presents datasets of electron microscopy, polarised neutron reflectometry, and magnetometry for ultra-small cobalt particles in titania thin films. The provided data can assist in the development of advanced fitting algorithms for magnetization gradients in thin films.
Article
Materials Science, Coatings & Films
Abdulhakim Bake, Weiyao Zhao, David Mitchell, Xiaolin Wang, Mitchell Nancarrow, David Cortie
Summary: Good specimen quality is crucial for successful scanning transmission electron microscope analysis. This study presents a modified method for preparing high-quality transmission electron microscope specimens with minimal ion-beam damage and artifacts, allowing for the study of ultra-thin surface regions.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Anatomy & Morphology
David R. G. Mitchell
Summary: This study developed a script-based method to optimize the settings of objective lens stigmators and reduce distortion in electron diffraction patterns. The method proved effective in achieving distortion-free diffraction.
MICROSCOPY RESEARCH AND TECHNIQUE
(2022)
Article
Environmental Sciences
JinKiat Chew, Stephen Joseph, Guanhong Chen, Yuyue Zhang, Longlong Zhu, Minglong Liu, Sarasadat Taherymoosavi, Paul Munroe, Genxing Pan, Lianqing Li, Rongjun Bian, Xiaorong Fan, David R. G. Mitchell
Summary: This study found that micron-sized biochar-based compound fertilisers (mBCF) can significantly enhance the growth and nutrient uptake of rice seedlings. The application of mBCF increased the shoot biomass of rice seedlings by 33% and improved the accumulation rates of nitrogen, phosphorus, potassium, iron, and other nutrients. Additionally, mBCF treatment affected the expression levels of nutrient transporter genes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Pratigya Sharma, Deobrat Singh, Manickam Minakshi, Saleha Quadsia, Rajeev Ahuja
Summary: Wheat straw-derived carbon was chemically activated using acid or base treatment, resulting in increased electron/hole mobility and capacitance. Acid-treated wheat straw showed a 34.5% increase in capacitance compared to base-treated wheat straw, attributed to the synergistic effects between surface functional groups, electrolyte ions, and the porous electrode.
Article
Chemistry, Multidisciplinary
Kethaki Wickramaarachchi, Manickam Minakshi, S. Assa Aravindh, Rukshima Dabare, Xiangpeng Gao, Zhong-Tao Jiang, Kok Wai Wong
Summary: Porous carbon derived from grape marc was synthesized and activated using KOH, which showed potential for use as supercapacitor. The presence of nitrogen dopant in the activation process enhanced the performance of the carbon material. The study also revealed that the KOH-activated carbon had better morphology, hierarchical pore structure, and larger surface area compared to the ZnCl2-activated carbon.
Article
Materials Science, Multidisciplinary
Ehsan Mohammadpour, Willey Yun Hsien Liew, Nicholas Mondinos, Mohammednoor Altarawneh, Sunghwan Lee, Nik Radevski, Manickam Minakshi, Amun Amri, Hong Ngee Lim, Zhong-Tao Jiang
Summary: This study explores the influence of substrate bias voltage on the mechanical properties of TiSiN coatings, revealing that increasing bias voltage can enhance hardness, Young's modulus, oxidation resistance, and thermal oxidation threshold of the coatings.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Matthew C. Tai, Matthew D. Arnold, Caleb Estherby, Kaludewa S. B. de Silva, Angus R. Gentle, David L. Cortie, David R. G. Mitchell, Mika T. Westerhausen, Michael B. Cortie
Summary: This study investigates the unexpected growth of highly aligned and optically polarizing metallic fins during physical vapor deposition, with various metals co-sputtered with Al resulting in diverse optical properties and color changes. The phenomenon is proposed to be caused by low atomic mobility in alloys and intermetallic compounds formed by co-depositing with Al, while metals like Cu, Ag, and Au do not form fins. The findings suggest a versatile technique for producing nanoscale polarizing surfaces suitable for high-flux and high-temperature applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Energy & Fuels
Naveed Hassan, Manickam Minakshi, Willey Yun Hsien Liew, Amun Amri, Zhong-Tao Jiang
Summary: This study investigates the thermal properties and stability of a binary salt mixture for thermal energy storage systems. The experimental results show suitable melting point and fusion enthalpy, but significant changes in fusion enthalpy occur over 30 heating-cooling cycles. Thermogravimetric analysis reveals weak thermal stability with considerable mass changes, possibly due to salt decomposition at high temperatures. Therefore, the practical application of this binary salt mixture may be limited.
Article
Automation & Control Systems
Ehsan Razavi, Ali Arefi, David Smith, Gerard Ledwich, Ghavameddin Nourbakhsh, Manickam Minakshi
Summary: This article develops a differential privacy (DP) model for short-term probabilistic energy forecasting at the low-aggregate level. The method first takes probabilistic forecasting elements from a predictor and injects noise into the mean of the forecast based on the Laplace mechanism to guarantee privacy on the mean. The standard deviation is then carefully perturbed (enlarged) to ensure the forecast to be released contains a desirable confidence interval (CI), here 95%.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Chemistry, Physical
Naveed Hassan, Manickam Minakshi, John Ruprecht, Willey Yun Hsien Liew, Zhong-Tao Jiang
Summary: This article investigates the thermophysical properties, thermal repeatability, and thermal decomposition behavior of a binary salt mixture, LiCl-LiOH, as a phase-change material for thermal energy storage. The composition of the binary salt mixture was determined using FactSage software, and its thermophysical properties were studied using a simultaneous thermal analyzer (STA). The results show that the binary salt mixture melts within the range of 269°C to 292°C with a heat of fusion of 379 J/g. Thermal repeatability tests and thermal decomposition analysis demonstrate its good thermal stability. Surface analysis using X-ray photoelectron spectroscopy (XPS) verifies the chemical stability of the binary salt mixture. Overall, this research confirms that the binary salt mixture is a potential candidate for thermal energy storage up to 500°C.
Article
Green & Sustainable Science & Technology
Chinmaya Kumar Sarangi, Abdul Rauf Sheik, Barsha Marandi, Vijetha Ponnam, Malay Kumar Ghosh, Kali Sanjay, Manickam Minakshi, Tondepu Subbaiah
Summary: Tellurium is an important material used in solar cells and thermal imaging devices. It is also used in alloys for electronic applications and as a catalyst in organic compound oxidation. This study developed optimum conditions for recovering tellurium and copper from waste anode slime with high tellurium concentration. The recovery process involves leaching, purification, and electro winning, resulting in high purity tellurium metal that can contribute to a sustainable energy future.
Review
Materials Science, Multidisciplinary
Seema Morab, Manickam Minakshi Sundaram, Almantas Pivrikas
Summary: Organic semiconductors offer a promising solution to overcome the limitations of inorganic semiconductors by providing low-cost, flexible, and lightweight alternatives. This review provides a thorough overview of charge carrier transport in organic semiconductors, focusing on the underlying physical mechanisms and their impact on device performance. Insights into the fundamental principles governing charge carrier behavior in these materials are also presented.
Article
Chemistry, Multidisciplinary
Shiguo Gu, Fei Lian, Yaru Han, Sarasadat Taherymoosavi, David Mitchell, Stephen Joseph, Zhenyu Wang, Baoshan Xing
Summary: This study investigates the interaction between submicron-sized black carbon and root surfaces of aquatic plants, revealing that low concentrations of nano-BC particles enhance the formation of iron plaque, while excess nano-BC impedes the formation of iron plaque and negatively affects plant growth and nutrient uptake.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
