Article
Electrochemistry
Haonan Li, Yuechan Li, Xiuxiu Li, An Xie, Dongya Sun, Yi Wang
Summary: This paper investigated the microstructure and electrochromic properties of nickel oxide films deposited on ITO-coated glass substrates at different sputtering pressures, finding that the films showed the best surface morphology and outstanding electrochromic performances at 2.4 Pa.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Ocal Tuna, Ali Kemal Mak, Osman Ozturk, Mevlut Karabulut
Summary: In this study, Nickel oxide (NiO) thin films were grown on glass substrate by direct current magnetron sputtering at different oxygen (O2) partial pressure. The influence of O2 partial pressure on the structural, optical, and electrochromic properties of NiO thin films were investigated. The results showed a strong relation between O2 partial pressure and various properties of the NiO films, and optimizing the O2 partial pressure led to the highest electrochromic efficiency.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
C. Guillaume, J. L. Frieiro, O. Blazquez, C. Labbe, J. Lopez-Vidrier, B. Garrido, S. Hernandez, B. Liu, L. Khomenkova, C. Frilay, F. Lemarie, C. Leroux, D. Pelloquin, X. Portier
Summary: (Tb, Eu)-co-doped ZnO films were grown on Si substrate with 3 at.% total doping rate, followed by annealing treatments at different temperatures. Eu and Tb segregation, additional phases appearance, intense Eu emission, and energy transfer from Tb towards Eu were observed during the study. The results pave the way for very thin ZnO based light emitting diodes.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Yilin Ding, Mengying Wang, Zheyue Mei, Lei Liu, Xiaolan Zhong, Mei Wang, Xungang Diao
Summary: We have successfully prepared W@NiO composite films to significantly improve the electrochromic properties through the dual impact of doping and pre-annealing. The obtained W@NiO-200 films show improved charge density, optical modulation, coloration efficiency, specific capacitance, as well as cyclic reversibility, rapid response time, and prolonged cycle lifespan. This study provides a new strategy for preparing high-quality electrochromic NiO films using sputtering technology.
Article
Materials Science, Multidisciplinary
A. M. dos Santos, J. C. Sagas, A. L. J. Pereira, F. D. Origo, R. C. Catapan, D. A. Duarte
Summary: This paper discusses the development of Ni-covered alumina catalysts using magnetron sputtering. The study found that catalysts produced by magnetron sputtering have high catalytic activity and exhibit ferromagnetic behavior.
Article
Materials Science, Multidisciplinary
M. Nyborg, K. Karlsen, K. Bergum, E. Monakhov
Summary: The relationship between Li concentration and the electrical properties of Cu2O was investigated, revealing that higher Li concentrations lead to an increase in hole concentration and a decrease in the activation energy for the dominant acceptors in Cu2O.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Multidisciplinary
Pattarapon Pooyodying, Jung-Woo Ok, Young-ho Son, Youl-Moon Sung
Summary: This study investigated the electrical and optical properties of an electrochromic device with molybdenum-doped tungsten trioxide electrode. The results showed that the WO3:Mo film prepared under specific RF power conditions exhibited the highest coloration efficiency and sensitivity among the tested samples.
Article
Electrochemistry
Yingming Zhao, Xiang Zhang, Xi Chen, Wenjie Li, Lebin Wang, Zitong Li, Jiupeng Zhao, Frank Endres, Yao Li
Summary: In this study, Sn-NiO films with superior electrochromic performance were prepared through a simple one-step magnetron sputtering process. By modifying the microstructure of the NiO film with Sn4+ ions, the grain size was refined, the electrochemically active surface was enlarged, and the diffusion of lithium ions was promoted, thus improving the electrochromic performances of the NiO film. The optimized Sn-NiO film showed outstanding electrochromic performances, including large transmittance modulation, high coloration efficiency, fast switching speed, and good cycling durability.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Tien-Chai Lin, Bai-Jhong Jheng, Hui-Min Yen, Wen-Chang Huang
Summary: In this study, a vanadium pentoxide (V2O5) thin film was transformed from an amorphous to polycrystalline structure through thermal annealing, resulting in improved electrochromic properties. The annealed V2O5 thin film exhibited higher charge capacity and transparent difference.
Article
Materials Science, Multidisciplinary
V. O. Semin, J. Jiang, R. Y. Umetsu, D. V. Louzguine-Luzgin
Summary: This study investigates three types of Fe-Ni-based materials prepared by radio frequency magnetron sputtering and analyzes their phase composition and nanostructure. The thermally crystallized Fe-Ni-Pt-Zr samples exhibit the best combination of magnetic properties among the deposited films.
Article
Chemistry, Multidisciplinary
Mohsin Khan, Ghazi Aman Nowsherwan, Aqeel Ahmed Shah, Saira Riaz, Muhammad Riaz, Ali Dad Chandio, Abdul Karim Shah, Iftikhar Ahmed Channa, Syed Sajjad Hussain, Rashid Ali, Shahzad Naseem, Muhammad Ali Shar, Abdulaziz Alhazaa
Summary: This research study focused on the preparation of Ni-doped AlN thin films by using DC and RF magnetron sputtering for optoelectronic applications. Several spectroscopy and microscopy techniques were considered for the characterization of structural, morphological, chemical bonding, and emission properties of the films. The results suggest that Ni: AlN is a promising candidate for optoelectronic applications.
Article
Chemistry, Physical
Xinhong Chu, Qiusheng Xie, Xiaoming Zhang, Bingfeng Guo, Jianqing Liao, Xiujian Zhao
Summary: In this study, VO2 thin films with good optical properties were fabricated on practical float glass by magnetron sputtering and annealing method. The films showed high near-infrared switching efficiency and energy modulation ability, as well as high visible transmittance. The crystalline and microstructural characteristics of the films were investigated, and the effects of doping and annealing on the film properties were discussed.
Article
Materials Science, Multidisciplinary
Hongye Chen, Huizhong Ma, Huimin Xia, Yunlong Chen, Lan Zhang
Summary: The optimized experimental parameters for NiO films via DC magnetron sputtering were studied, revealing that using 200 W sputtering power, O2/Ar ratio of 6:50, and 5-minute deposition time is an energy-saving and excellent preparation method. A new hybrid electrolyte consisting of a 3:1 ratio of KOH and LiClO4/PC was prepared, showing improved electrochromic properties for NiO films. Through electrolyte study, a novel method for achieving high electrochromic performance was explored.
Article
Materials Science, Multidisciplinary
E. G. Fridriksson, T. K. Tryggvason, U. B. Arnalds, A. S. Ingason, F. Magnus
Summary: In this study, different crystal phases of niobium oxides films were successfully synthesized by reactive dc magnetron sputtering and vacuum annealing, and the crystal formation was controlled by adjusting the oxygen flow and annealing temperature.
Article
Engineering, Electrical & Electronic
Mehmet Ali, Ozlem Duyar Coskun
Summary: Electrochromic materials offer sustainable and innovative solutions for EC devices, smart windows, and optoelectronic applications. By applying voltage, the optical transmissions of these materials can be modulated. Achieving high optical modulation and coloration efficiency is crucial for EC devices on solid and flexible substrates. This study investigates the effects of deposition pressure on the structural, optical, and electrochromic properties of WO3 films deposited on flexible PET substrates. The results show that increasing the deposition pressure improves the coloration efficiency of the WO3 films, and there is an optimal oxygen to argon partial pressure ratio for improved EC properties.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Electrical & Electronic
Dawu Lv, Wenfeng Shen, Weigang Chen, Yuheng Wang, Ruiqin Tan, Meng Zhao, Weijie Song
Summary: Developing low-cost and high-performance ammonia sensors is significant for air pollution control and non-invasive diagnosis of human diseases. This study successfully developed a sensor by in situ polymerization of poly(aniline-co-pyrrole) on a flexible porous polyvinylidene fluoride-based sensitive membrane. The sensor exhibited excellent sensing performance with a response of 93% to 1 ppm NH3 at room temperature and a low detection concentration of 0.05 ppm. It also demonstrated long-term stability and outstanding flexibility. The study provides potential for commercial application in ammonia concentration detection related to human health.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Electrical & Electronic
Dawu Lv, Wenfeng Shen, Weigang Chen, Yuheng Wang, Ruiqin Tan, Meng Zhao, Weijie Song
Summary: A citric acid-doped polyaniline/polyvinylidene fluoride (CPP) flexible ammonia sensor was prepared by in situ oxidative chemical polymerization on a flexible porous polyvinylidene fluoride membrane. The CPP sensor showed excellent performance with high response, low detection limit, and fast response and recovery times. It also demonstrated outstanding flexibility and stability. The results suggest that the CPP flexible film sensor is a high-performance candidate for enhanced ammonia gas sensing properties at room temperature.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Energy & Fuels
Huang Lin, Renjie Miao, Haiqiao Wang, Huahang Lai, Weiyan Wang, Weijie Song
Summary: This study focuses on improving the folding stability of foldable perovskite solar cells (PSCs) by sandwiching them with protective layers. The experimental results show that these sandwich-structured PSCs (SS-PSCs) exhibit high environment stability and excellent mechanical stability, making them a promising candidate for foldable optoelectronic devices.
Article
Chemistry, Physical
Huan Zhao, Zhipeng Yin, Pengcheng Gu, Yang Liu, WeiYan Wang, Huahang Lai, Hai-Qiao Wang, Ning Li, Weijie Song
Summary: The current state-of-the-art organic solar cells (OSCs) commonly use halogenated materials and solvents, which can be corrosive and harmful to the environment. Therefore, it is meaningful to explore and develop efficient and stable OSCs based on halogen-free materials and solvents. Researchers have successfully demonstrated that fully halogen-free OSCs can achieve efficient performance with an efficiency of 10.42% and superior thermal stability, due to the use of nonhalogenated active blend and processing solvent, which inhibit corrosion and preserve the initial efficiency for a prolonged period of time under high temperature conditions.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Tianzhe Huang, Qixiang Chen, Jinhua Huang, Yuehui Lu, Hua Xu, Meng Zhao, Yao Xu, Weijie Song
Summary: Researchers have successfully developed colored daytime radiative coolers (CDRCs) with the use of a polymer-Tamm photonic structure, which demonstrated significant temperature reduction in experiments. This work provides guidelines for large-scale manufacturing of CDRCs and offers unprecedented opportunities for potential applications with energy-saving, aesthetic, and visual comfort demands.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Xueqi Wang, Ye Yang, Qiongya Jin, Qicun Lou, Qizhao Hu, Ziling Xie, Weijie Song
Summary: A new strategy for significantly improving the ionic conductivity of PVB through cross-linking with KH560 is presented. The cross-linked PVB-SPE with 10 wt.% KH560 exhibits the highest room-temperature ionic conductivity value among the investigated samples (1.51 x 10(-4) S cm(-1)), surpassing previously reported PVB-based SPEs (10(-5)-10(-7) S cm(-1)). The prepared electrolyte also demonstrates excellent optical, mechanical, and thermal performances, making it suitable for large-area ECDs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Qicun Lou, Ye Yang, Xueqi Wang, Qizhao Hu, Weijie Song
Summary: Tempering is essential for strengthening the manufacturing of safe glass. In order to improve the production of EC safety glass with varied size, it is important to ensure that the sputtered NiO film maintains its electrochromic performance after tempering. This study explores the feasibility of composition modification by W and Zn co-doping and finds that tempering offers the co-doped NiO film better electrochromic properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Jiaqi Yin, Dawu Lv, Jinglong Zhao, Wenfeng Shen, Pengfei Hu, Weijie Song
Summary: In this study, inkjet printing technology is used to deposit sensitive materials as a vertically assembled nest-like array composed of petal-shaped nanoparticles. It overcomes the drawbacks of traditional MEMS-based deposition technology for gas sensor sensitive materials in terms of cumbersome and unstable operation. The mesoporous ZnO sensor exhibits high gas-sensing response to low concentration acetone due to the uniform small nanoparticles, multi-dimensional assembly structures, and abundant oxygen vacancy defects.
Article
Chemistry, Analytical
Tiancheng Zhang, Ruiqin Tan, Wenfeng Shen, Dawu Lv, Jiaqi Yin, Weigang Chen, Haoyue Fu, Weijie Song
Summary: An electronic nose system was developed using a gas sensor array composed of MEMS sensors prepared by inkjet printing sensing materials on a micro-hotplate. The power consumption was decreased to 36 mW, and the optimal features were selected using the PSO algorithm. Support vector machine and artificial neural network models based on the optimal features were able to accurately recognize and quantify VOCs. The results demonstrate the promising potential of this approach.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Zhi Han, Jia Li, Peng Xia, Jinhua Huang, Ruiqin Tan, Jinlong Zhang, Weijie Song
Summary: High performance and durable electrodes are essential for optoelectronic devices like ACEL applications. However, stability issues surrounding the silver (Ag) layer in ultrathin metal-based flexible electrodes have hindered their practical use. This study successfully prepares ultrathin and stable doped silver films by introducing a small amount of AlN during the sputtering process. These Ag-AlN films exhibit improved stability under high temperature and damp-heat conditions, and have been successfully used in flexible ACEL devices with excellent performance and mechanical flexibility.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Applied
Peiyu Wu, Shengxiong Zhang, Wenjun Zhang, Weijie Song
Summary: In this study, a new D-A structure polymer PPDOTTPD was synthesized by Stille coupling, and its electrochromic and electrofluorochromic properties were investigated for the first time. The results showed that PPDOTTPD exhibited outstanding electrochromic and electrofluorochromic performance. The dual-functional device based on PPDOTTPD showed high optical and fluorescence contrast. These findings provide possibilities for developing high-performance intelligent optical devices.
Review
Chemistry, Physical
Xi Fan, Nathan E. Stott, Jixi Zeng, Yunfei Li, Jianyong Ouyang, Liang Chu, Weijie Song
Summary: This review discusses the applications of PEDOT:PSS materials in photovoltaics, light-emitting diodes, thermoelectrics, photodetectors, and strain sensors. It introduces the basic principles and current research status of functionalized films and explores ways to enhance their optoelectrical and thermoelectrical properties, stretchability, stability, and wettability. The review also highlights the latest advances in the aforementioned devices and provides perspectives and suggestions for further development in optoelectronics and thermoelectrics.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Review
Chemistry, Multidisciplinary
Jinglong Zhao, Wenfeng Shen, Dawu Lv, Jiaqi Yin, Tongxiang Liang, Weijie Song
Summary: Changes in volatile organic compounds concentrations in human breath are closely related to certain diseases. The diagnosis of diseases by analyzing volatile organic compounds in human breath is a non-invasive, and easy-to-use tool that has gained increasing attention. Gas-sensitive sensors, with their easy integration, miniaturization, low cost, and simplicity, have broad prospects in the future diagnosis and early screening of large-scale population diseases.
PROGRESS IN CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xinxin Zhang, Tianyu Xu, Ziqi Tian, Xiang He, Shengxiong Zhang, Ling Ai, Wenjun Zhang, Shiyong Liu, Weijie Song
Summary: In this study, we synthesized three soluble perinone isomers as electron transport materials in p-i-n perovskite solar cells. The cis-isomer BBIN-2 showed higher LUMO level and electron mobility compared to the trans-isomers. The BBIN-2 devices demonstrated the highest power conversion efficiency of 19.36%, highlighting the potential of perinone dyes in perovskite solar cells.
CHEMICAL COMMUNICATIONS
(2023)
Review
Biochemistry & Molecular Biology
Huchao Cheng, Ruiqin Tan, Jia Li, Jinhua Huang, Weijie Song
Summary: This paper reviews the application potential and challenges of lithium metal as an anode material for lithium secondary batteries, as well as the methods and strategies to inhibit lithium dendrite growth.
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)