Article
Materials Science, Ceramics
Ganesh Koyyada, Burragoni Sravanthi Goud, Mohamed Ouladsmane, Jae Hong Kim, Nam Hai Nguyen Thi, Nam Nguyen Dang
Summary: The demand for high-energy storage supercapacitors with appropriate designs has led to the development of g-C3N4/WO3(H2O)0.33 (GCN/WO) nanostructures, which have been prepared using a simple wet impregnation process. These nanostructures show improved electrochemical storage performance compared to their individual components, with increased specific capacitance and cyclic stability. The positive synergistic effect between GCN and WO in the nanostructures contributes to their enhanced electrochemical capacitor characteristics.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yuan Lu, Binglu Deng, Yangbiao Liu, Jixi Wang, Zekun Tu, Junming Lu, Xiudi Xiao, Gang Xu
Summary: In this study, a high-performance supercapacitor using a Co3O4 electrode with a porous nanostructure was successfully achieved through calcination treatment of the metal organic framework ZIF-67. The resulting Co3O4 electrode exhibited high specific capacitance, energy density, and excellent cycling stability.
Article
Chemistry, Physical
Shubhangi B. Bandgar, Madagonda M. Vadiyar, Chitra L. Jambhale, Jin-Hyeok Kim, Sanjay S. Kolekar
Summary: A rapid and low-cost ice crystal-assisted precipitation method was used to synthesize self-assembled structures of nickel ferrite nanoparticles and zinc ferrite nanorods, enhancing the overall performance of supercapacitors. The porous void-rich structures of the nanoparticles and nanorods provided excellent charge storage properties, with high specific capacities and durability demonstrated in the electrodes. Additionally, a flexible asymmetric supercapacitor device fabricated from these materials showed superhigh energy density and excellent long-term stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
Ankit Kumar, Debanjan Das, Debasish Sarkar, Karuna Kar Nanda, Satish Patil, Ashok Shukla
Summary: A one-step synthesis method was demonstrated to produce sheet-like RuS2 nanoarchitectures as a potential cathode material for high-performance asymmetric supercapacitors. The densely packed nanosheets of RuS2 provide abundant sites for energy storage reactions and enhanced electrochemical performance compared to RuO2. The RuS2 electrode exhibited improved capacitance through a combination of capacitive and diffusion-controlled processes, leading to attractive energy-power combination and excellent cycling performance in an activated carbon//RuS2 ASC.
Article
Chemistry, Analytical
Jyotendra Kunwar, Debendra Acharya, Kisan Chhetri, Bibek Karki, Bikash Deo, Roshan Mangal Bhattarai, Shova Neupane, Mandira Pradhananga Adhikari, Amar Prasad Yadav
Summary: MXene, a 2D layered material, has attracted significant interest in energy storage research due to its excellent properties such as high metallic conductivity, high hydrophilicity, high energy storage capability, biocompatibility, and excellent electrochemical activity. However, the restacking of MXene layers and its narrow working potential window limit its use in supercapacitors. In this study, MXene was synthesized and combined with cobalt oxide nanoparticles to enhance its electrochemical performance for energy storage applications.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Energy & Fuels
Sara A. Teama, Heba M. El Sharkawy, Nageh K. Allam
Summary: The design and synthesis of innovative materials with specific architecture is crucial for advancing the supercapacitor industry. Transition metal selenides, specifically trimetallic Mn-V-Fe selenide, show great promise as energy storage materials due to their high electronic conductivity and theoretical capacitance. The successful fabrication of MVF-Se through a two-step hydrothermal approach and its thorough characterization provide insights into its composition, structure, and morphology. Electrochemical tests demonstrate the high areal capacitance of the MVF-Se electrode and the desirable energy density and cyclic stability of the assembled supercapacitor device.
Article
Chemistry, Multidisciplinary
Bin Zhang, Ping Liu, Zijiong Li, Xiaohui Song
Summary: A series of honeycombed perovskite-type Sr-doped LaNiO3 nanosheets were successfully synthesized with abundant porous structure, showing excellent electrochemical performance and high cycling stability. This novel electrode material exhibits promising potential for energy storage applications.
Review
Chemistry, Inorganic & Nuclear
Md. Shahinul Islam, Mahfuza Mubarak, Ha-Jin Lee
Summary: The global demand for energy is rising, driving the development of high-performance energy storage devices using nanoscale designs and hybrid approaches. Hybrid nanostructured materials, such as transition metal oxides/hydroxides, metal chalcogenides, metal carbides, metal-organic frameworks, carbonaceous compounds, and polymer-based porous materials, have been used as electrodes for efficient energy storage systems.
Article
Energy & Fuels
S. Ezhil Arasi, R. Ranjithkumar, P. Devendran, M. Krishnakumar, A. Arivarasan
Summary: The study reported the supercapacitive behavior of chemically synthesized cobalt vanadate nanostructures. Crystallographic information and optical response were investigated through various analytical techniques. The prepared Co3V2O8 showed specific capacitance value of about 790 F/g at 1 A/g current density and 90.1% capacitive retention after 10000 cycles, indicating its potential as an electrode material for future energy storage devices.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Nargish Parvin, Dhananjaya Merum, Tapas Kumar Mandal, Sang W. Joo
Summary: In this study, multishelled hollow structures (HoMSs) with different shell numbers, thicknesses, pore sizes, surface areas, and void sizes were successfully synthesized using carbon microspheres as a hard template and two different strategies: two-step strategy (TsS) and one-step strategy (OsS). The ZnO@TiO2 HoMSSs synthesized by OsS (triple shelled) exhibited excellent potassium storage capacity, rate capability, reversibility, and cyclic life in aqueous alkaline batteries, thanks to the thinner shell, larger pore size, high surface area, and bigger voids that provided a distinctive buffering zone for charge-discharge and improved the structural stability and cycling stability during the OH- intercalation/de-intercalation process.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Suma Chandra Reddy Niragatti, Sreekanth Thupakula Venkata Madhukar, Jonghoon Kim, Kisoo Yoo
Summary: In this study, Co-doped NiHCF/Ni-foam composites were synthesized and their electrochemical properties were investigated. The results demonstrate that the proposed composite material shows excellent performance as a positive electrode in hybrid supercapacitors, with high power density and energy density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Energy & Fuels
Akshay Khorate, Anamika V. Kadam
Summary: This research article summarizes the latest research advances on patents published on supercapacitors, describing the fabrication methods of various carbon and polymer-based materials, designing concepts and characterization values of their materials in high-efficiency flexible supercapacitors with relevant applications in the public sector, electronics department, and medical field.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Kamakshaiah C. Devarayapalli, Pavitra Vengamamba Kaniyampati, Kiyoung Lee, Surya Veerendra Prabhakar Vattikuti, Jaesool Shim, Christian M. Julien
Summary: The 3D/2D composite material MCNG, consisting of MoS2/g-C3N4/rGO, shows outstanding specific capacitance and cyclic stability, making it a promising electrode material for advanced energy storage devices. Additionally, a coin-cell-type asymmetric supercapacitor using MCNG as the positive electrode demonstrates high energy density and power density. This synthesis approach provides a new avenue for developing efficient electrode materials for energy storage applications.
Article
Chemistry, Physical
Anukriti Pokhriyal, Rosa M. N. Gonzalez-Gil, Leandro N. M. Bengoa, Pedro Gomez-Romero
Summary: This article addresses the issue of bulk electrode design and the factors limiting the performance of thick electrodes. The researchers developed and compared supercapacitor thick electrodes using commercially available carbons and conventional methods such as spray coating and freeze-casting. They analyzed factors such as porosity and tortuosity that determine the performance of thick electrodes. The spray-coated electrodes showed high areal capacitances of 1428 mF cm(-2) at 0.3 mm thickness and 2459 F cm(-2) at 0.6 mm thickness.
Article
Energy & Fuels
Akbar I. Inamdar, Harish S. Chavan, Giho Shin, Jonghoon Han, Seungun Yeon, Sunjung Park, Supriya A. Patil, Nabeen K. Shrestha, Hyungsang Kim, Hyunsik Im
Summary: This study demonstrates the electrochromic energy storage properties of pure and doped Prussian blue thin films fabricated using electrodeposition. Among the doped specimens, the Mo-doped PB films exhibit the most promising properties, including high specific capacity, excellent colouration efficiency, significant optical density difference, and ultra-fast colouration and bleaching behaviour.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Textiles
Linghui Peng, Lingling Shen, Weiren Fan, Zichuan Liu, Hongbo Qiu, Aibing Yu, Xuchuan Jiang
Summary: The importance of outdoor thermal comfort due to climate change has led to the development of a smart thermal management film with an Ag/VO2/Ag sandwich structure. This film can reduce temperature by around 10 degrees C under intense infrared radiation and has potential applications in wearable devices, flexible electronics, medical monitors, and smart IR radiation management.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Metallurgy & Metallurgical Engineering
Siddhartha Shrestha, Jin Xu, Aibing Yu, Zongyan Zhou
Summary: FLDS technology can effectively reduce fuel consumption and improve the quality of sintered products by evenly distributing heat patterns. Air velocity and bed height have significant influences on the operation, and sensitivity analysis can provide guidance for FLDS operation.
IRONMAKING & STEELMAKING
(2022)
Article
Engineering, Chemical
Qinwen Liu, Wenqi Zhong, Aibing Yu, Chi-Hwa Wang
Summary: With the improvement of the models for oxy-fuel co-firing, the adaptability of the models to the oxy-fuel atmosphere can be enhanced, and the accurate prediction of NO, N2O, SO2 emissions can be achieved. This study also provided valuable information for the design and operation control of oxy-fuel co-firing of coal and biomass in a fluidized bed.
Article
Energy & Fuels
Dianyu E, Peng Zhou, Suya Guo, Jia Zeng, Qiang Xu, Liejin Guo, Qinfu Hou, Aibing Yu
Summary: This study employed a multiscale method to investigate the evolution, microscale characteristics, coke temperature, and combustion in the raceway of a blast furnace under different operating conditions. The results showed consistent distributions of coke temperature, carbon loss, and diameter variation, and the carbon monoxide concentration was influenced by the oxygen concentration but not by changes in the inlet gas temperature and flow rate.
Article
Energy & Fuels
Lingling Liu, Shibo Kuang, Lulu Jiao, Baoyu Guo, Aibing Yu
Summary: This study presents a numerical investigation on the effects of pulverized coal injection (PCI) in an industrial blast furnace. The results show that appropriate oxygen enrichment and suitable burden distribution can enhance the maximum operable PCI rate, while excessive oxygen enrichment increases coke consumption. The integrated model used in this study can serve as a cost-effective tool to optimize PCI effects on blast furnace performance.
Article
Engineering, Chemical
Kaiwei Chu, Yanxing Chen, Li Ji, Zongqing Zhou, Aibing Yu, Jiang Chen
Summary: This study presents a numerical investigation of gas-solid flow in a gas cyclone using a coarse-grained combined Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD) model. The results demonstrate that the model captures the typical flow features in a gas cyclone and highlights the importance of including the van der Waals force for accurate separation efficiency prediction.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Energy & Fuels
Jing Li, Shibo Kuang, Lulu Jiao, Lingling Liu, Ruiping Zou, Aibing Yu
Summary: The study investigates the impact of hydrogen enrichment on a blast furnace, finding that as hydrogen content increases, the coke rate initially decreases before increasing, and productivity improves but slows down gradually. The optimal hydrogen enrichment can be determined based on the minimum coke rate. Overall, hydrogen enrichment enhances the energy efficiency of the blast furnace.
Article
Engineering, Chemical
Jieqing Gan, Zongyan Zhou, Aibing Yu, Dean Ellis, Reece Attwood, Wei Chen
Summary: Multibody dynamics (MBD) simulation is a useful tool for analyzing the kinematic function of multibody systems, while discrete element method (DEM) is commonly used for simulating particle flows and overall processes. Combining MBD and DEM methods through functional mock-up interface (FMI) co-simulation can predict equipment performance by considering both material and equipment behavior. This study utilized Dymola software to perform MBD and FMI co-simulations, developing MBD models for a hydraulic excavator system and GPU-based DEM models for excavator digging cycles. The results demonstrated the significant impact of solid materials on excavator movement.
Article
Engineering, Chemical
Lingling Liu, Shibo Kuang, Baoyu Guo, Aibing Yu
Summary: Optimization of ironmaking blast furnaces involves considering bottom and top operations. A recently developed integrated BF model and numerical orthogonal experiments are used to predict BF performance indicators and conduct multi-objective optimization and operatable zone identification.
CHEMIE INGENIEUR TECHNIK
(2023)
Article
Energy & Fuels
Lingling Liu, Shibo Kuang, Baoyu Guo, Aibing Yu
Summary: Oxygen blast furnace (OBF) is a low carbon ironmaking technology that suffers from high gas flame temperature. Injecting COREX off-gas (CROG) into the industrial BF can improve coal combustion and overall performance. The optimum injection rate of CROG helps achieve better fuel economy by enhancing indirect reduction and coke combustion.
Article
Engineering, Chemical
E. Dianyu, Haihan Fan, Zhongfang Su, Guangtai Xu, Ruiping Zou, Aibing Yu, Shibo Kuang
Summary: This paper proposes a hydrocyclone with a tapered inlet design to reduce the influence of particles misplacement. The new hydrocyclone integrates the advantages of both spiral inlet and tangential inlet. Through the analysis of separation performance, flow characteristics, and volume fraction distributions, an optimum design is identified. Compared to a standard hydrocyclone, the new design significantly improves tangential velocities, expands the locus of zero vertical velocity, and achieves more stable air core, symmetric radial and axial velocity distributions, as well as reduced eddy flow and short-circuit flow. This study offers a new perspective for improving hydrocyclone flows and performance.
Article
Chemistry, Multidisciplinary
Yang Zhang, Danjiao Zhao, Lei Cao, Lanlan Fan, Aiping Lin, Shufen Wang, Feng Gu, Aibing Yu
Summary: Flexible strain sensors are crucial for public healthcare as they can noninvasively monitor vital health signals. In this study, we developed structurally integrated 3D conductive networks-based flexible strain sensors using a droplet-based aerosol jet printing process and a transfer process. The sensors showed enhanced conduction and mechanical properties during stretching, and demonstrated effective responses to human movements such as finger bending and arm bending. Our findings highlight the potential of droplet-based aerosol jet printing for advanced flexible devices in optoelectronics and wearable electronics applications.
Article
Engineering, Chemical
Yifan Qin, Xiao Dong Chen, Aibing Yu, Jie Xiao
Summary: Mathematical modeling of mass transfer and absorption in the small intestine is challenging and requires a reliable and computationally efficient predictive model. This study derives an absorption model that considers the 3D intestinal inner wall structure and can be used in a 1D distributed model. Computational fluid dynamics simulations are used to quantify the mass-transfer coefficient. The model provides insights into the influence of intestinal morphology and motility on mass transfer and absorption.
Article
Energy & Fuels
E. Dianyu, Peng Zhou, Langyong Ji, Jiaxin Cui, Qiang Xu, Liejin Guo, Aibing Yu
Summary: In this study, a validated CFD-DEM model is used to investigate the dynamics, microstructure, and thermochemical behaviors in the raceway of a blast furnace with hydrogen injection operations. The effects of hydrogen injection concentration on raceway size, gas temperature, and components are studied.
Article
Pharmacology & Pharmacy
Hao Miao, Ke Huang, Yingwen Li, Renjie Li, Xudong Zhou, Jingyu Shi, Zhenbo Tong, Zhenhua Sun, Aibing Yu
Summary: In this study, the LNP formulation, atomization methods, and buffer system were optimized to maintain stability and efficiency of mRNA encapsulated LNPs during the atomization process. A suitable LNP formulation for atomization, AX4, DSPC, cholesterol, and DMG-PEG2K at a 35/16/46.5/2.5 (%) molar ratio, was identified based on in vitro experiments. Soft mist inhaler (SMI) was found to be the most suitable method for pulmonary delivery of mRNA encapsulated LNPs. The physico-chemical properties of the LNPs, such as size and entrapment efficiency, were further improved by adjusting the buffer system with trehalose. In vivo fluorescence imaging of mice demonstrated the potential of SMI with proper LNPs design and buffer system for inhaled mRNA-LNP therapies.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
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)
