Article
Chemistry, Physical
Wenhan Xu, Yanwei Li, Jinhuan Yao, Shunhua Xiao, Botian Liu
Summary: A LiFePO4/rGO composite is synthesized using the leaching liquor of jarosite residue as the Fe source. The composite shows excellent cycling stability, rate capability, and kinetics as a cathode material for lithium-ion batteries. This work realizes the high-value utilization of Fe resources in jarosite residue and the low-cost preparation of LiFePO4 cathode material for LIBs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
M. A. A. Mohamed, L. Singer, H. Hahn, D. Djendjur, A. Oezkara, E. Thauer, I. G. Gonzalez-Martinez, M. Hantusch, B. Buechner, S. Hampel, R. Klingeler, N. Graessler
Summary: In this study, an antiperovskite (Li2Fe)SeO material was synthesized using a one-step solid-state method. The material showed excellent thermal stability and high cycling performance, making it a promising cathode material for lithium-ion batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Yin Li, Li Wang, Feng Liang, Yaochun Yao, Keyu Zhang
Summary: This study successfully improved the electronic conductivity and lithium ion mobility of LiFePO4 through boron doping at the P-site, enhancing its electrochemical performance. The LiFeP0.98B0.02O4-delta/C exhibited the best performance, delivering a first discharge capacity of 138 mAh g(-1) at 2C with no evident capacity fading after 300 cycles. However, excessive doping of boron could lead to oxygen defects in the material, resulting in unfavorable electrochemical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Maral Ghahramani, Susan Hamidi, Mahsa Mohammad, Mehran Javanbakht, Pooya Gorji
Summary: In this study, sulfonated copolymer was used as an effective binder to improve the efficiency of lithium-ion batteries. The investigation showed that the use of sulfonated PVDF binder resulted in decreased concentration polarization and improved lithiation and delithiation kinetics for LiFePO4 electrodes. After 300 cycles, the discharge capacity remained 90 mAh g-1 with a capacity retention of 100% at 1C.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Chenkun Li, Yao Xiao, Xiaosong Zhang, Hongwei Cheng, Ya-Jun Cheng, Yonggao Xia
Summary: This study presents a practical method to address the irreversible capacity loss of lithium-ion batteries during initial cycling by utilizing a Li2CO3/carbon nanocomposite as a lithium replenishment material. The nanocomposite, synthesized through high-speed ball-milling, exhibits high specific capacity and capacity retention in the initial charging cycle. By incorporating the nanocomposite in full-cells, the capacity and cycling life of the batteries are significantly improved.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Daniel Uxa, Helen J. Holmes, Kevin Meyer, Lars Doerrer, Harald Schmidt
Summary: The LiNi0.33Mn0.33Co0.33O2 compound is an important cathode material for Li-ion batteries, and this study found that lithium diffusion can be analyzed using stable Li-6 tracers combined with SIMS analysis. The research results indicate that lithium diffuses via structural vacancies, with the concentration of which is fixed by Li deficiency.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Energy & Fuels
Sina Karimzadeh, Babak Safaei, Wei Huang, Tien-Chien Jen
Summary: In this study, first principle calculations were performed to investigate the properties of LiFePO4 (LFP) cathode material for Li-ion batteries and the effects of Nb doping on its crystalline structure. The results revealed that Nb doping at the Fe site significantly improved the conductivity of LFP, reduced the band gap, and enhanced the stability of the system. Geometrical analysis showed that Nb doping widened the Li passage channel, increased bond length, and reduced covalent strength, leading to a lower energy barrier for Li ion diffusion. Moreover, Nb doping had no adverse effect on the theoretical voltage of LFP. The findings also demonstrated that Nb doping decreased the energy barriers for Li migration and significantly improved the diffusion coefficient of Li-ion in LFP.
JOURNAL OF ENERGY STORAGE
(2023)
Review
Chemistry, Physical
Jing Geng, Shuchao Zhang, Xixi Hu, Wenqin Ling, Xiaoxiao Peng, Shenglin Zhong, Fangan Liang, Zhengguang Zou
Summary: This review introduces the LiFePO4 material and the modification methods of graphene and its derivatives on LiFePO4, discusses the problems that arise, and introduces the corresponding solutions. Finally, the future development of this composite material is discussed.
Article
Engineering, Environmental
Xiangping Chen, Shuzhen Li, Yi Wang, Youzhou Jiang, Xiao Tan, Weijiang Han, Shubin Wang
Summary: This study successfully applied ultrasound-assisted Fenton reaction to selectively remove PVDF binders from spent LIBs, recovering LiFePO4 cathode materials. Experimental results showed that under optimized conditions, about 97% of the cathode materials can be scrubbed from the aluminum foils, and the cleaned materials are free from contamination.
Article
Chemistry, Physical
Yukang Liu, Hao Zhang, Zheng Huang, Qian Wang, Mingyi Guo, Mingqing Zhao, Dingyue Zhang, Jiagui Wang, Ping He, Xiangyang Liu, Mauricio Terrones, Yanqing Wang
Summary: Our study introduces an efficient and practical conducting mode built by ternary conductive networks to enhance the rate performance of LiFePO4 cathodes in lithium-ion batteries. We investigate the influence of electrical conductivity, rate capability, and continuous ion channels on the resulting electrode. By individually dispersing carbon nanotubes (CNTs) with long-range electronic conduction into an electrode slurry, we create more open channels for electron and ion transportation, enhancing the fast electron/ion open channels of the composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Dimitra Vernardou
Summary: In this review, the hydrothermal growth method of lithium iron phosphate and its effect on the electrochemical performance of cathodes are discussed. The advantages of the hydrothermal process, as well as the ability to tune growth parameters and modify material characteristics, are highlighted. Recent strategies involving carbon-based materials, N-doped graphene oxide, multi-wall carbon nanotubes, and metallic nanoparticles are explored for improving cathode performance and stability. Future directions include simultaneous growth of solid-state electrodes and powders, as well as improving morphology and orientation for standardized growth of energy storage materials.
Article
Materials Science, Ceramics
M. G. Moustafa, F. Elmasry
Summary: In this study, a developed In2O3-coated LiFePO4 cathode was successfully fabricated by the sol-gel technique. The electrochemical performance of the synthesized cathode was remarkably improved under the In2O3 coating layer, showing high discharge and charge capacities as well as enhanced coulombic efficiency. Furthermore, the cathode exhibited a high-capacity retention rate after multiple cycles.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yang Liu, Cai Qi, Dandan Cai, Xiao Tang, Ying Li, Wenxian Li, Qinsi Shao, Jiujun Zhang
Summary: The development of electrode materials with high capacity and rate capability is necessary for improving the energy density and cycle life of lithium-ion batteries (LIBs). In this study, a cathode material, LiFePO4/C, modified with high electrical conductivity compound tantalum carbide (TaC), was successfully synthesized via hydrothermal method. The co-coating of nano-sized TaC and amorphous carbon layer on the surface of LiFePO4 particles allows for efficient electron and Li ion transfer, resulting in improved electrochemical kinetics. As a cathode material for LIBs, this composite demonstrates excellent electrochemical performances with high reversible capacity (159.0 mAh g(-1), 0.1C) and improved rate capacity. This methodology provides a new prospect for the application of transition metal carbides (TMCs) in modifying battery electrode materials.
Article
Materials Science, Multidisciplinary
Chunmao Huang, Shenghong Liu, Yang Wang, Jingjie Feng, Yanming Zhao
Summary: NaVMoO6 with brannerite-type structure was successfully synthesized using a sol-gel method, and utilized as a cathode material for lithium ion batteries for the first time. The material showed stable reversible specific capacity, indicating its potential as a cathode material for LIBs and enriching the possibilities of molybdenum-based materials for this application.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Elena V. V. Shchurik, Olga A. A. Kraevaya, Sergey G. G. Vasil'ev, Ivan S. S. Zhidkov, Ernst Z. Z. Kurmaev, Alexander F. F. Shestakov, Pavel A. A. Troshin
Summary: The development of organic electrode materials is crucial due to the increasing demand for affordable, safe, recyclable, and environmentally friendly batteries. In this study, a novel redox-active polymer consisting of a polyaniline-type conjugated backbone and quinizarin and anthraquinone units was synthesized. The polymer exhibited promising performance characteristics as a cathode material in both lithium and potassium cells, with high discharge capacity and excellent stability. The synthetic availability and low projected cost of the designed material make it suitable for practical implementation in scalable and inexpensive organic batteries, which are emerging as a sustainable energy storage technology.
Review
Chemistry, Multidisciplinary
Anirudha Jena, Behrouz Bazri, Zizheng Tong, Kevin Iputera, Jheng-Yi Huang, Da-Hua Wei, Shu-Fen Hu, Ru-Shi Liu
Summary: This review focuses on the use of high-voltage cathode materials in all-solid-state batteries, where the redox peak of the cathode components extends beyond 4.7 V. Li-Ni-Mn-O systems are currently being investigated as cathodes for high-voltage cells. Additionally, the compatibility between electrodes and electrolytes at such high potentials is discussed, as well as the importance of controlling anode thickness to reduce solid-electrolyte interphase formation and dendrite growth. The review also discusses strategies for optimizing cell components to minimize electrode-electrolyte impedance and facilitate ion transportation during battery cycling.
Review
Materials Science, Multidisciplinary
Wen-Tse Huang, Veeramani Rajendran, Ming-Hsien Chan, Michael Hsiao, Ho Chang, Ru-Shi Liu
Summary: With the development of technology, the importance and practicality of near-infrared (NIR) light in the biomedical field have gained attention from academia and industry. Luminescent materials with different doping strategies show promise in covering the near-infrared biological windows. The relationship between NIR light, nanophosphors, and biological tissue has been explored, allowing for diagnostic and therapeutic applications in different NIR windows.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yu-Kai Liao, Zizheng Tong, Shin-An Liu, Jui-Hsiung Huang, Ru-Shi Liu, Shu-Fen Hu
Summary: This study used a high-conductivity garnet-type solid electrolyte (LLZTO) and Li-Ga-N composite anode to reduce interfacial resistance and enhance the performance of all-solid-state batteries. The research demonstrated a stable cycling performance and high discharge capacity retention.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Natalia Majewska, Alfonso Munoz, Ru-Shi Liu, Sebastian Mahlik
Summary: This study compares the changes in the luminescence properties of Ga2O3:Cr3+ modified by Al or Sc ion substitution (chemical pressure) and hydrostatic pressure. Ga2-x Al x O3:Cr3+ exhibits the same behavior under chemical and mechanical pressure, while Ga2-x Sc x O3:Cr3+ shows different behavior. Al substitution affects the crystal volume but not the chemical bond angles in the Cr3+ local environment, whereas Sc ions cause lattice distortion and influence the chemical bond lengths and angles. The energy structure diagrams of the d(3) configuration of Cr3+ ion as a function of pressure are calculated by considering the pressure dependence of the Racah parameters. It is suggested that the method and diagrams presented in this paper should be used for interpreting high-pressure experiments involving Cr3+ and other transition metals.
CHEMISTRY OF MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Aishwarya Satpathy, Ting-Yi Su, Wen-Tse Huang, Ru-Shi Liu
Summary: The design of nanoprobes in the NIR-II region has attracted significant attention due to their flexible emission and reduced photon scattering for in vivo fluorescence imaging. Quantum dots, AIEgens, carbon nanotubes, and polymers are constantly being improved for better NIR-II emission. Lanthanides and nanophosphors are extensively explored for NIR-II imaging applications, with nanophosphors showing promising luminescence properties and energy transfer processes. Our review aims to provide insights into nanophosphors for biological imaging applications and compare them with lanthanides in order to understand their mechanism and importance in the future bio-imaging field.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2023)
Review
Crystallography
Kashyap Dave, Wen-Tse Huang, Ru-Shi Liu
Summary: This review focuses on the recent development of zero-dimensional inorganic halide luminescent materials with tetrahedral and octahedral coordination, discussing their synthesis methods, crystal structures, and applications. These materials are categorized based on the valence of central metal cations (monovalent, divalent, and trivalent). The review article provides an overview of recent progress on these materials and their potential for further development in various applications.
Article
Nanoscience & Nanotechnology
Jheng-Yi Huang, Ching-Yun Cheng, Yan-Ming Lai, Kevin Iputera, Ren-Jei Chung, Ru-Shi Liu
Summary: In this study, Li3InCl6-coated LNMO (LIC@LNMO) was prepared using the sol-gel method to address the issues of LNMO. By introducing a halide-type solid-state electrolyte protective layer, direct contact between LNMO and electrolyte was prevented while maintaining good ionic conductivity. The results showed that 5 wt% LIC@LNMO exhibited a good cycle performance, with a Coulombic efficiency of 99% and a capacity retention of 80% after the 230th cycle at 1C at room temperature.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Editorial Material
Chemistry, Physical
Ru-Shi Liu
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Pavitra Srivastava, Yu-Kai Liao, Kevin Iputera, Shu-Fen Hu, Ru-Shi Liu
Summary: The use of β-SiC as an additive can improve the physical contact between Garnet-type solid-state electrolytes and Li metal, resulting in improved intimacy and robustness by forming lithiophilic Li4SiO4 and hard SiC phases. The optimized Li-SiC|LLZTO|Li-SiC symmetric cell exhibits low interfacial impedance and superior cycling stability.
Article
Chemistry, Multidisciplinary
Loan Thi Ngo, Wen-Tse Huang, Ming-Hsien Chan, Ting-Yi Su, Chien-Hsiu Li, Michael Hsiao, Ru-Shi Liu
Summary: This study investigates the neurotoxicity of all-inorganic lead halide perovskite quantum dots (PeQDs) using Caenorhabditis elegans as a model organism. The results show that PeQDs accumulate mainly in the alimentary system and head region, causing a decrease in locomotor behaviors, pharyngeal pumping, brood decline, short lifespan, and abnormal issues in reproduction. Excessive reactive oxygen species formation is also observed. The neurotoxicity of PeQDs is explained by gene expression. This study provides an insight into the neurotoxicity of PeQDs and inspires the development of nontoxic PeQDs.
Review
Materials Science, Multidisciplinary
Wen-Tse Huang, Kuan-Chun Chen, Ming-Hsuan Huang, Ru-Shi Liu
Summary: Applications in the near-infrared (NIR) have been extensively researched in various fields, such as bioimaging, night vision, plant growth, and chemical analysis. Different emission profiles are required in the same industry. Developing luminescent materials with different tuning methods is reliable for controlling the NIR regions. Spinel phosphors are promising candidates due to their ability to modulate the crystal field. Understanding the parameters that influence the degree of inversion in spinel compounds is crucial for harnessing the variability of the spinel structure.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ching Liu, Wen-Tse Huang, Juqing Li, Yu-Chun Lee, Tzong-Liang Tsai, Fang-Chun Shen, Wen-Wei Wu, Ru-Shi Liu, Xuejie Zhang
Summary: Perovskite quantum dots with good optical properties are hindered in practical applications due to their low stability against heat, water, oxygen, and light. In this study, CsPbBr3@glass was fabricated using melt-quenching and heat treatment. The encapsulation of CsPbBr3@glass with dense SiO2 and hydrophobic SiO2 layers improved its water resistance, thermal reversibility, and photostability. CsPbBr3@glass@ASG showed a preserved initial PL intensity of 100% after water resistance testing for seven weeks and continuous heating-cooling cycles. With a balance between optical properties and stability, CsPbBr3@glass@ASG has great potential for practical applications in optoelectronic devices in the future.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Vasantan Rasupillai Dharmaraj, Ayan Sarkar, Chia-Hui Yi, Kevin Iputera, Shang-Yang Huang, Ren-Jei Chung, Shu-Fen Hu, Ru-Shi Liu
Summary: This study introduces Ru metallic nanoparticles on carbon nanotubes (CNTs) as a cathode for Mg-O2 batteries, optimizing the reaction kinetics and cyclic stability. By using a new type of mixed electrolyte, the corrosion behavior of Mg anodes can be reduced. This CME-based Ru/CNT Mg-O2 battery design shows improved cyclic stability and lower overpotential.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Mikolaj Kaminski, Agata Lazarowska, Tadeusz Lesniewski, Ru-Shi Liu, Sebastian Mahlik
Summary: This paper analyzes the influence of pressure on electron-lattice interactions in the 5d excited states of Ce3+ and Eu2+ in the AlN host. The results show that pressure has different effects on the optical properties of Eu2+ and Ce3+. The experimental data demonstrate that the displacement effect of pressure on Eu2+ is minimal, while Ce3+ shows a significant pressure-induced redshift. These findings highlight the importance of specific central ions in the lattice relaxation process.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Ming-Hsien Chan, Bo-Gu Chen, Chien-Hsiu Li, Wen-Tse Huang, Ting-Yi Su, Lichang Yin, Michael Hsiao, Ru-Shi Liu
Summary: Single-atom nanozymes are a new trend in biomaterials research, enabling the application of single atoms in biological fields and catalysis of proteins with inorganic nanoparticles. This study developed a lipid-coated nanozyme with carbon quantum dots and single-atomic gold for effective treatment and diagnosis of oral squamous cell carcinoma.
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)
