Article
Materials Science, Composites
M. A. Umarfarooq, P. S. Shivakumar Gouda, N. R. Banapurmath, M. I. Kittur, Tabrej Khan, Bisma Parveez, Tamer A. Sebaey, Irfan Anjum Badruddin
Summary: Failure by delamination is a significant concern in laminated composites, as it leads to degradation of stiffness and potential structural failure. Knowledge of delamination resistance and influencing factors is crucial for material selection. This study investigates the effect of fiber hybridization and post-curing on the interlaminar fracture toughness of Glass/Carbon/Epoxy composites. The hybrid GCE laminates exhibit higher fracture toughness, attributed to the synergistic effect of Carbon and Glass fibers. Post-curing at 180 degrees C also improves fracture toughness.
POLYMER COMPOSITES
(2023)
Article
Engineering, Multidisciplinary
Christopher Meninno, Vijaya Chalivendra
Summary: The study investigated the impact of different laminate orientations on mode-I and mode-II fracture toughness, as well as the correlation between fracture toughness values and scanning electron microscopy images. The results showed that C-0-G-90 composites exhibited higher mode-I fracture toughness, while G-0-C-90 composites showed higher mode-II fracture toughness. The electrical response was found to be closely related to crack dynamics.
COMPOSITES PART B-ENGINEERING
(2021)
Review
Materials Science, Ceramics
Jinsong Yang, Jinlu Chen, Fang Ye, Laifei Cheng, Yi Zhang
Summary: This review summarizes the synthesis processes and applications of high-temperature atomically laminated materials such as graphite, hexagonal boron nitride (h-BN), and MAX phases. It also analyzes the differences in mechanical performance between these materials and isotropic materials, and looks forward to their future development in toughening applications.
CERAMICS INTERNATIONAL
(2022)
Article
Mechanics
Cheng Huang, Mathew W. Joosten
Summary: The translaminar fracture toughness of two different continuous fibre 3D printed ply architectures was evaluated using a compact tension test. The performances of a baseline 0/90 cross-ply architecture and a semi-woven 0/90 ply architecture resembling Advanced Placed Ply (AP-Ply) fabricated using automated fibre placement were compared. The experimental results showed that the laminate architecture has a slight influence on the trans-laminar fracture toughness of 3D printed carbon fibre composites, and both ply architectures exhibited a rising R curve, with the semi-woven samples showing a less pronounced curve.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Ceramics
Jiaxing Shao, Weiguo Li, Haibo Kou, Yong Deng
Summary: A temperature dependent fracture toughness model for whisker-reinforced ceramic matrix composites was developed and its predicted results were compared with experimental data, showing good agreement. Furthermore, the effects of various parameters on the temperature dependent fracture toughness were systematically analyzed, providing insights and suggestions for optimizing and improving composite fracture toughness at different temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Characterization & Testing
Chang Su, Xin Wang, Lining Ding, Pancheng Yu
Summary: By incorporating MWCNTs, the toughness and strength of resin matrices can be effectively improved, enhancing the tensile strength and stiffness of FRP. SEM observations indicated that MWCNTs had a significant impact on the enhancement mechanism of fiber-reinforced polymers, improving the tensile strength and impact resistance of FRP.
Article
Materials Science, Composites
Dong Quan, Jiaming Liu, Liaojun Yao, Clemens Dransfeld, Rene Alderliesten, Guoqun Zhao
Summary: The adhesion between recycled carbon fibres (rCFs) and Polyphenylene-sulfide (PPS) fibres in rCF/PPS composites was tailored by UV-treatment of non-woven mats, leading to improved intralaminar fracture resistance and mechanical properties under tensile and shear loading conditions, but negatively affected interlaminar fracture resistance.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Jens Bauer, Marti Sala-Casanovas, Mahsa Amiri, Lorenzo Valdevit
Summary: This study expands the concept of nanoarchitecture to dense metal/ceramic composites, presenting co-continuous architectures of three-dimensional printed pyrolytic carbon shell reinforcements and electrodeposited nickel matrices, demonstrating ductile compressive deformability with elongated ultrahigh strength plateaus, resulting in an extremely high combination of compressive strength and strain energy absorption.
Article
Engineering, Manufacturing
Weigang Shi, Chao Zhang, Bo Wang, Mei Li, Chengyu Zhang
Summary: The wedge-loaded double cantilever beam (W-DCB) method was used in this study to evaluate the mode I interlaminar fracture toughness of two-dimensional (2D) continuous fiber-reinforced ceramic matrix composites (CMCs). A W-DCB model was established based on the elastic foundation theory, taking into account the axial force effect, shear effect, asymmetric propagation, and incomplete interlaminar contact. The friction effect was analyzed and measured using the theory of error transfer and a quasi-in-situ measurement method. The results demonstrate the accuracy of the W-DCB formula in conjunction with the experimental data, as verified by compliance curves, crack tip behaviors, and the cohesive zone of 2D CMCs. Furthermore, the calculated energy release rate (ERR) using the W-DCB theory was consistent with the measured data.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Yoran Geboes, Amalia Katalagarianakis, Jeroen Soete, Jan Ivens, Yentl Swolfs
Summary: Translaminar fracture toughness is a key property that determines the damage tolerance and notch sensitivity of fibre-reinforced composites. This study found that using PAR and PBO fibers can significantly improve the translaminar fracture toughness of composite materials, while the performance of aramid fiber is lackluster in comparison.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Surekha Yadav, Qiaofu Zhang, Priyanshi Agrawal, Ravi Sankar Haridas, Christopher Morphew, Amit Behera, Zaynab Mahbooba, Jiadong Gong, Rajiv S. Mishra
Summary: In this study, a non-equiatomic CoCrFeNiMo high-entropy alloy was used as a binder for TiB2-HEA composites. The composites with TiB2-6 vol% and TiB2-10 vol% were successfully fabricated using mechanical alloying and spark plasma sintering. The microstructural study showed the importance of the carbide/binder interface on the fracture toughness and strength of the composites. An intermediate layer between TiB2 and HEA phases was observed, which enhanced the wettability between the ceramic and binder phase. The fracture mode changed from intergranular to transgranular as the binder content increased. The TiB2-10 vol% composite exhibited high relative density, Vickers hardness, and fracture toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Manufacturing
Somen K. Bhudolia, Goram Gohel, Durga Vasudevan, Kah Fai Leong, Pierre Gerard
Summary: This study investigates the Mode II fracture toughness of room temperature curable acrylic Elium(R) resin and toughened Elium(R) IM with 10% weight ABS particles. Different thermoplastic fabrics including UHMWPE, UHMWPP, and polyester are tested. The findings show that the GIIC of UHMWPP/Elium(R) IM composite is 33.3% higher than that of UHMWPP/Epoxy composite. Polyester/Elium(R) composites have 27.02% higher GIIC than Polyester/Epoxy composites, while Polyester/Elium(R) IM composites exhibit the highest GIIC which is 17.76% higher than Polyester/Elium(R) composites. Fractography analysis reveals significant crack resistance and toughening mechanisms in toughened Elium(R) IM composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Sheng Wang, Mehmet Cagatay Akbolat, Oguzcan Inal, Kali Babu Katnam, Zhenmin Zou, Prasad Potluri, James Taylor
Summary: This study investigates the effect of short micro-fibre-based veils on the fracture energies and R-curves of composite laminates, with a focus on the role of veil binders. The results show that the binders used in the manufacturing of veils have a considerable impact on fracture energy, crack path, and R-curve behavior, with a more pronounced effect in the laminates with carbon veils.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Composites
Robert B. Zando, Ataollah Mesgarnejad, Chunzhou Pan, Sandra J. Shefelbine, Alain Karma, Randall M. Erb
Summary: Crack deflection is often used as evidence of substantial fracture toughness in composites, with recent advances in composite manufacturing allowing for the creation of detailed microstructures that can locally tune fracture toughness anisotropy. In this study, a herringbone pattern structure effectively traps propagating cracks along a spine to enhance fracture toughness, demonstrating the potential for improved material properties through structural design. The results suggest that controlling crack propagation direction can significantly boost overall material performance.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
C. C. Ye, H. Q. Ru, C. P. Zhang, W. Wang, D. L. Chen
Summary: Silicon nitride (Si3N4) ceramics were fabricated using Al2O3, MgO, and Y2O3 as sintering additives via hot-pressing sintering and gas pressure sintering. Texture analysis revealed the presence of a specific orientation in the hot-pressing sintered samples, leading to anisotropy in fracture toughness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Multidisciplinary Sciences
Yuming Chen, Ziqiang Wang, Xiaoyan Li, Xiahui Yao, Chao Wang, Yutao Li, Weijiang Xue, Daiwei Yu, So Yeon Kim, Fei Yang, Akihiro Kushima, Guoge Zhang, Haitao Huang, Nan Wu, Yiu-Wing Mai, John B. Goodenough, Ju Li
Article
Nanoscience & Nanotechnology
Qipeng Yu, Weicong Mai, Weijiang Xue, Guiyin Xu, Qi Liu, Kun Zeng, Yuanming Liu, Feiyu Kang, Baohua Li, Ju Li
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Nanoscience & Nanotechnology
Youqiang Chen, Xinni Zhang, Weijiang Xue, Zhipeng Xie
ACS APPLIED MATERIALS & INTERFACES
(2020)
Review
Chemistry, Physical
Yimeng Huang, Yanhao Dong, Sa Li, Jinhyuk Lee, Chao Wang, Zhi Zhu, Weijiang Xue, Yao Li, Ju Li
Summary: Spinel LiMn2O4, an important cathode material for lithium-ion batteries, has excellent rate performance but suffers from severe degradation, especially under extreme voltages and high temperatures. Current understanding and future trends of spinel cathodes and its derivatives with cubic lattice symmetry are discussed, with a focus on degradation mechanisms and further development.
ADVANCED ENERGY MATERIALS
(2021)
Article
Energy & Fuels
Weijiang Xue, Tianwu Chen, Zhichu Ren, So Yeon Kim, Yuming Chen, Pengcheng Zhang, Sulin Zhang, Ju Li
Article
Multidisciplinary Sciences
Guiyin Xu, Daiwei Yu, Dongchang Zheng, Shijian Wang, Weijiang Xue, Xiangkun Elvis Cao, Hongxia Zeng, Xianghui Xiao, Mingyuan Ge, Wah-Keat Lee, Meifang Zhu
Article
Chemistry, Multidisciplinary
Meiying Li, Tao Liu, Zhe Shi, Weijiang Xue, Yong-sheng Hu, Hong Li, Xuejie Huang, Ju Li, Liumin Suo, Liquan Chen
Summary: The energy density is crucial for lithium-ion batteries, but traditional electrode utilization is unsatisfactory. A dense all-electrochem-active electrode has been proposed to minimize the energy density gap, achieving a high compacted filling rate and energy density.
ADVANCED MATERIALS
(2021)
Article
Engineering, Environmental
Guiyin Xu, Haibin Jiang, Myles Stapelberg, Jiawei Zhou, Mengyang Liu, Qing-Jie Li, Yunteng Cao, Rui Gao, Minggang Cai, Jinliang Qiao, Mitchell S. Galanek, Weiwei Fan, Weijiang Xue, Benedetto Marelli, Meifang Zhu, Ju Li
Summary: The study developed a carbon foam microwave plasma process to convert unsorted white wastes into gases and solid carbon, which can be buried as artificial coal. The process is self-perpetuating and does not require pre-sorting or washing, making it highly promising and feasible.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Sa Li, Xin Sun, Yang Liu, Guang Liu, Weijiang Xue, Iradwikanari Waluyo, Zhi Zhu, Yunguang Zhu, Yanhao Dong, Yunhui Huang, Ju Li
Summary: This study focuses on a nanocomposite material prepared by a two-step heat treatment to improve the performance of lithium-ion batteries, including high discharge capacity and energy density, as well as 80% cycling stability retention.
Article
Energy & Fuels
Weijiang Xue, Mingjun Huang, Yutao Li, Yun Guang Zhu, Rui Gao, Xianghui Xiao, Wenxu Zhang, Sipei Li, Guiyin Xu, Yang Yu, Peng Li, Jeffrey Lopez, Daiwei Yu, Yanhao Dong, Weiwei Fan, Zhe Shi, Rui Xiong, Cheng-Jun Sun, Inhui Hwang, Wah-Keat Lee, Yang Shao-Horn, Jeremiah A. Johnson, Ju Li
Summary: The authors have developed a sulfonamide-based electrolyte that allows for stable cycling of LiNi0.8Co0.1Mn0.1O2 in lithium metal batteries at a cutoff voltage of 4.7 V, achieving a specific capacity >230 mA h g(-1) and an average Coulombic efficiency >99.65% over 100 cycles. The 4.7 V lithium-metal battery can retain >88% capacity for 90 cycles even under harsh testing conditions, advancing practical lithium-metal batteries.
Article
Chemistry, Multidisciplinary
Tao Liu, Zhe Shi, Huajun Li, Weijiang Xue, Shanshan Liu, Jinming Yue, Minglei Mao, Yong-sheng Hu, Hong Li, Xuejie Huang, Liquan Chen, Liumin Suo
Summary: The research introduces a bifunctional fluorinated silane-based electrolyte with a density of 1.0 g mL(-1), which reduces lithium metal loss rate and extends the cycle life of lithium-sulfur batteries. Compared with conventional electrolytes, this electrolyte not only lowers the electrolyte/cell capacity ratio, but also enhances stability under limited lithium amounts.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Weijiang Xue, Rui Gao, Zhe Shi, Xianghui Xiao, Wenxu Zhang, Yirui Zhang, Yun Guang Zhu, Iradwikanari Waluyo, Yao Li, Megan R. Hill, Zhi Zhu, Sa Li, Oleg Kuznetsov, Yiman Zhang, Wah-Keat Lee, Adrian Hunt, Avetik Harutyunyan, Yang Shao-Horn, Jeremiah A. Johnson, Ju Li
Summary: This study demonstrates the improved cycling stability of high-voltage lithium-metal batteries by using a rationally designed sulfonamide-based electrolyte, which stabilizes the electrode-electrolyte interfaces on both the Li-metal anode and high-voltage LCO cathode. Commercial LCO cathodes show significantly better capacity retention after cycling under high charging voltages of 4.55 V-Li and 4.6 V-Li with the sulfonamide-based electrolyte, outperforming traditional carbonate-based electrolytes. This work provides a promising strategy for designing new electrolytes to achieve high-energy Li||LCO batteries.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Zhi Zhu, Daiwei Yu, Zhe Shi, Rui Gao, Xianghui Xiao, Iradwikanari Waluyo, Mingyuan Ge, Yanhao Dong, Weijiang Xue, Guiyin Xu, Wah-Keat Lee, Adrian Hunt, Ju Li
ENERGY & ENVIRONMENTAL SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Weijiang Xue, Daiwei Yu, Liumin Suo, Chao Wang, Ziqiang Wang, Guiyin Xu, Xianghui Xiao, Mingyuan Ge, Minseong Ko, Yuming Chen, Long Qie, Zhi Zhu, Ahmed S. Helal, Wah-Keat Lee, Ju Li
Article
Chemistry, Multidisciplinary
Weijiang Xue, Zhe Shi, Mingjun Huang, Shuting Feng, Chao Wang, Fei Wang, Jeffrey Lopez, Bo Qiao, Guiyin Xu, Wenxu Zhang, Yanhao Dong, Rui Gao, Yang Shao-Horn, Jeremiah A. Johnson, Ju Li
ENERGY & ENVIRONMENTAL SCIENCE
(2020)
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)
