Article
Chemistry, Multidisciplinary
Gengchen Yu, Qi Zhang, Jiayi Jing, Xu Wang, Yifan Li, Xue Bai, Tao Li
Summary: By using a simple solvothermal method followed by calcination treatment, Cu+ doping in porous TiNb2O7 microspheres is successfully achieved. The introduction of Cu+ improves the electronic conductivity and lithium-ion diffusion in TiNb2O7 due to the reduced band gap and increased interplanar spacing. The Cu0.06Ti0.94Nb2O7 sample exhibits high reversible capacity, superior rate capability, and long-term cycling stability at both ambient and low temperatures, demonstrating its great potential in energy-storage applications.
Article
Materials Science, Ceramics
Caiyun Gao, Zhicheng Li, Lin Yang, Dicheng Peng, Hong Zhang
Summary: Bi-modified (Zn0.4Ni0.6)(1-x)NaxO ceramics with a rock-salt type structure exhibit negative temperature coefficient (NTC) characteristics, with NTC material constants (B values) higher than 4000 K. The resistivity and B values can be adjusted by altering the content of Na-ions and Bi-ions, and the addition of Bi2O3 enhances sintering ability and aging stability significantly.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Electrochemistry
Fitri Nur Indah Sari, Ngoc Thanh Thuy Tran, Yi-Xin Lin, Siang-Yun Li, Yun-Hwei Shen, Jyh-Ming Ting
Summary: This paper presents an experimental and theoretical study on multi-metal hydroxide modified with electronic structure doping, which exhibits enhanced electrochemical performance for supercapacitor and oxygen evolution reaction (OER) applications. The study shows that increasing the metal content improves the electrochemical performance, with the hydroxide containing 5 cations (high entropy hydroxide, HEOH) showing the best performance. The HEOH demonstrates excellent specific capacity, rate retention, and cycle stability, and also shows superior performance in OER compared to the benchmark catalyst.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
S. Wang, H. B. Huang, F. Yin, X. S. Hou, Z. Zhang, L. M. Luo, C. Chen
Summary: Multilayer composites have the potential to enhance the mechanical properties of conventional metals. In this study, Ti/Ta multilayer composites with different thickness ratios were prepared and their microstructure and mechanical properties were investigated. The results showed that the volume fraction of different layers in the composites can be adjusted by changing the bonding temperature and thickness ratio, leading to variations in mechanical properties.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Chemistry, Applied
Fan Peng, Youqi Chu, Yu Li, Qichang Pan, Guangchang Yang, Lixuan Zhang, Sijiang Hu, Fenghua Zheng, Hongqiang Wang, Qingyu Li
Summary: The simultaneous construction of a Mg, Ti-based surface integrated layer and bulk doping through Mg, Ti surface treatment can suppress the lattice oxygen evolution and improve the stability and capacity retention of nickel-rich layered cathode materials during high-voltage cycling.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Juan Wu, Yali Wen, Qun Zhou, Jie Wang, Lina Shen, Junwei Zheng
Summary: In this study, a strategy for fabricating Co-free, nickel-rich materials by Sn modification of LiNiO2 was reported. Both bulk doping of Sn4+ ions and surface coating of Li2SnO3 were achieved under high temperature conditions. The Sn-modified materials exhibited improved structure reversibility, integrity of secondary particles, and interfacial stability during charge/discharge cycling. The optimized material, LiNi0.97Sn0.03O2, showed an impressive discharge capacity of 216.76 mAh g-1 at 0.1 C with a capacity retention of 80.61% after 250 cycles at 0.5 C. The Sn doping also contributed to the rate capability of the materials, delivering a discharge capacity of 148.06 mAh g-1 at 5 C. Overall, the simultaneous dual functionalization of Sn in LiNiO2 appears to be a promising approach for obtaining Co-free, nickel-rich materials.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yawen Yan, Qiu Fang, Xiaoxiao Kuai, Shiyuan Zhou, Jianken Chen, Haitang Zhang, Xiaohong Wu, Guifan Zeng, Zixin Wu, Baodan Zhang, Yonglin Tang, Qizheng Zheng, Hong-Gang Liao, Kang Dong, Ingo Manke, Xuefeng Wang, Yu Qiao, Shi-Gang Sun
Summary: By utilizing the unique characteristics of high-valence Nb5+ element, the researchers successfully achieved one-step modification of LiCoO2 cathode material with surface coating and desired concentration gradient structure, improving its battery performance and providing new insights for the research of high-energy density and long-life lithium-ion cathode materials.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Danyang Li, Chuanrui Wu, Xiaoxu Wen, Bo Gao, Ziyi Liu, Haihua Huang, Shujuan Yao, Xipeng Pu
Summary: This study introduces oxygen vacancies, doped titanium, and plasmonic bismuth metal into BiOCl using a simple solvothermal method, allowing for tunable photocatalytic efficiency by controlling the content of doped titanium. The enhanced photocatalysis mechanism is discussed in detail, showing potential for application in other catalysts to address environmental issues.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Ki-Yong Yoon, Juhyung Park, Hosik Lee, Ji Hui Seo, Myung-Jun Kwak, Jun Hee Lee, Ji-Hyun Jang
Summary: Doping engineering plays a crucial role in controlling the electrical, optical, and structural properties of semiconductors. Understanding interactions between impurities can lead to the efficient fabrication of photoelectrodes.
Article
Chemistry, Physical
Lina Yv, Jing Wang, Xuetan Li, Lijing Dai, Zhongcai Shao
Summary: The research shows that doping Ti can significantly affect the structure, morphology, and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 material. The material with Ti4+ doping has smaller particle size, regular shape, and high crystallinity, and it helps improve the cycle and rate performance of the material.
Article
Chemistry, Physical
Xu Cheng, Gaolei Zhao, Wenjiang Qiang, Bingxin Huang
Summary: In this study, the Ni-rich cathode was modified with Ti and La to improve the cycling and rate performance. The modified cathode showed enhanced cycling stability and maintained the mechanical integrity of the cathode particles. The modification also increased the Li+ diffusion coefficient, leading to improved rate performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Zhicheng Xie, Yingying Zhang, Xiuqin Min, Anbao Yuan, Jiaqiang Xu
Summary: A sulfur-modified NCA cathode material was prepared with the addition of lithium sulfide as the sulfur-containing additive. The doping of sulfur anion reduced Ni2+ content and improved structural stability, resulting in excellent cycling stability and storage stability of the co-modified material. The enhanced electrode/electrolyte interfacial stability also contributed to the significantly improved cyclability of the material.
ELECTROCHIMICA ACTA
(2021)
Article
Engineering, Environmental
Shumin Huang, Peiyu Li, Jing Wang, Jacob Chih-Ching Huang, Qifan Xue, Nianqing Fu
Summary: Organic-inorganic hybrid perovskite solar cells (PSCs) are a promising photovoltaic technology, and the electron transport layer (ETL) plays a critical role in their performance. SnO2, as an alternative material to TiO2, has been improved in recent years to enhance the performance of PSCs.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
B. L. Zhu, C. H. Yi, K. Lv, J. Wu, X. W. Shi
Summary: The effects of GZO layer thickness and annealing treatment on the properties of GZO/HGZO bi-layer films were investigated. Increasing GZO layer thickness weakens the (002) preferred orientation and affects the electrical and optical properties of the films. The best conductive properties are obtained at GZO layer thickness of 20 nm. The annealing temperature has an impact on the stress and properties of the films.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Muhd Firdaus Kasim, Wan Aida Hazwani Wan Azizan, Kelimah Anak Elong, Norashikin Kamarudin, Muhamad Kamil Yaakob, Nurhanna Badar
Summary: Ti-doped Ni-rich cathode material LiNi0.7Co0.3O2 showed expanded lattice structure, lower cation mixing, and enhanced lithium-ion kinetics, leading to improved specific discharge capacity and capacity retention compared to pristine samples. Experimental and first principles studies indicated that Ti species can stabilize crystal structure and facilitate Li-ion movement, making Ti-doped materials promising candidates for rechargeable Li-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Electrochemistry
Zhi-Wei Li, Yun-Shan Jiang, Yang Xia, Liang Deng, Mei-Yan Sun, Guang-Jie Shao, Lei Zhao, Fu-Da Yu, Zhen-Bo Wang
Summary: This study successfully achieved ultra-long cycling of lithium cobaltate at high voltage by using a surface modification layer. The strategy protects the electrode, reduces cobalt loss, and provides extra electrons for the lithium ion reactions.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Mi Guo, Liang Luo, Shulin Chen, Zhenzhen Wang, Pengjian Zuo, Zhenbo Wang
Summary: In this study, dual-modification of LiNi0.88Co0.09Al0.03O2 was achieved by LiBO2-coating and Mg-doping, aiming to stabilize its crystal structure and reduce its surface activity. The dual-modification effectively improved the discharge ability, rate capability, and cycling behavior of LiNi0.88Co0.09Al0.03O2. The co-modification cathode showed excellent prolonged cycling stability in cylindrical 18650 batteries at both room and high temperature.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Xin-Yu Li, Fu-Da Yu, Wang Ke, Yun-Shan Jiang, Lan-Fang Que, Lei Zhao, Su-E Hao, Zhen-Bo Wang
Summary: Li2MnO3 is the parent compound of Li-rich Mn-based cathode materials and has attracted considerable interest due to its high electrochemical activity caused by the existence of oxygen vacancies. The mechanism behind the oxygen vacancies in Li2MnO3 is still under debate. In this study, Li2MnO3 with different oxygen vacancy contents was synthesized using a mechanical thermal activation engineering strategy to investigate its electrochemical activity. It was found that the introduction of oxygen vacancies effectively modulates the electronic structure, inducing distortion of the interfacial structure and stimulating the electrochemical activity. The evolution of Mn and O in Li2MnO3 during cycling showed that the Mn-O hybridization is strongly correlated with the oxygen redox behaviors, and high electrochemical activity and cycling stability cannot coexist. This work provides valuable insights into the origin of electrochemical activity in Li2MnO3 for the design of high energy density cathode materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Review
Chemistry, Physical
Long-Ji Yuan, Xu-Lei Sui, Chang Liu, Yu-Ling Zhuo, Qi Li, Hui Pan, Zhen-Bo Wang
Summary: This review provides a systematic introduction to the research methods of M-N-C catalysts, reveals their electrocatalytic mechanism and structure-activity relationship, and points out future research directions.
Article
Nanoscience & Nanotechnology
Xiongzhi Yang, Jinzhu Jia, Linghao Sun, Guangsheng Huang, Junli Zhou, Ruanming Liao, Zhonghui Wu, Lin Yu, Zhenbo Wang
Summary: The regeneration of harmful activated sludge into an energy source is a valuable strategy for municipal sludge treatment and recycling. In this study, SiO2-modified N,S auto-doped porous carbon (NSC@SiO2) was successfully obtained through a simple calcination method. The introduction of P-doped NSC@SiO2 (NSPC@SiO2) further enhanced its surface area, pore volume, and carbon defects, making it an excellent sulfur host for lithium-sulfur batteries.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yun-shan Jiang, Fu-da Yu, Wang Ke, Liang Deng, Yang Xia, Xin-yu Li, Lan-fang Que, Nian Zhang, Lei Zhao, Zhen-bo Wang
Summary: Disordered rocksalt-like cathodes with initial Li-deficient nanostructures, cation vacancies, and partial spinel-type structures have been prepared, providing fast Li+ percolation channels under Li-deficient condition. The prepared sample exhibits high initial discharge capacity and energy density. Advanced spectroscopy and in situ measurements observe highly reversible charge compensation and assign coupled Mn- and O-related redox contribution. Theoretical calculations suggest a novel and chemical reversible trapped molecular O-2 model in the rocksalt structure with vacancies, demonstrating a dual role of Li-deficient structure in promoting cationic oxidation and extending reversible oxygen redox boundary. This work is expected to break through the existing ideas of oxygen oxidation and opens up a higher degree of freedom in the design of disordered rocksalt structures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yunkun Dai, Bo Liu, Ziyu Zhang, Pan Guo, Chang Liu, Yunlong Zhang, Lei Zhao, Zhenbo Wang
Summary: A strategy of Fe d-orbital splitting modulation by constructing axial coordination on Fe-N-4 sites is presented to regulate the electronic states of single atomic sites around the Fermi level. The axial tractions induce the distortion of Fe-N-4 SP and up to the quasi-octahedral coordination (Fe-N4O1 OCquasi), leading to electron rearrangement and diluted spin polarization. This work provides a novel understanding for improving electrocatalytic performance through orbital-scale manipulation.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yaru Yang, Qingjun Zhu, Jiayi Yang, Han Liu, Yang Ren, Xulei Sui, Panpan Wang, Gang Sun, Zhenbo Wang
Summary: A dual gaseous surface treatment strategy with ammonium bicarbonate is designed to reconstruct the surface characteristics of Li-rich manganese base oxides, achieving an enriched oxygen vacancies mixed-phase surface layer. This modified cathode exhibits excellent high-temperature performance, including improved coulombic efficiency, cycling stability, and rate capability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jianxi Lu, Songbo Chen, Yuling Zhuo, Xinya Mao, Dong Liu, Zhenbo Wang
Summary: The study demonstrates the design of a novel electrocatalyst with high catalytic performance for hydrogen production through seawater electrolysis. Surface amorphization and morphology engineering are combined to improve catalytic performance. The synergistic effect between surface amorphization and unique microcolumn morphology contributes to the remarkable performance of the electrocatalyst.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Long-Ji Yuan, Bo Liu, Li-Xiao Shen, Yun-Kun Dai, Qi Li, Chang Liu, Wei Gong, Xu-Lei Sui, Zhen-Bo Wang
Summary: A Cyan-Fe-N-C catalyst was constructed with the help of axial Fe4C atomic clusters, which exhibited high catalytic performance in acid environment. The Fe-pyrrolic N-4 structure was stabilized and optimized for OH* adsorption, resulting in excellent half-wave potential and power density in fuel cells.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Yaxuan Wang, Junfu Li, Shilong Guo, Ming Zhao, Weiwei Cui, Lianfeng Li, Lei Zhao, Zhenbo Wang
Summary: In this study, a new method of battery failure diagnosis in terms of capacity fading is proposed based on the heterogeneous multi-physics aging model of lithium-ion batteries. The key parameters are obtained by using a parameter identification method, and the parameter boundaries when the battery is on the verge of failure are obtained through a model-driven method. Monitoring the key parameters allows for online diagnosis of battery failure and provides an early warning signal when the battery reaches the end of its life, ensuring battery performance and safety.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Lixiao Shen, Miao Ma, Zigang Zhao, Fengdi Tu, Jing Liu, Bin Xu, Yunlong Zhang, Lei Zhao, Guangjie Shao, Zhenbo Wang
Summary: The impact of carbon structure on the performance of carbon-supported catalysts has been studied under different relative humidity conditions. Low-loading solid carbon catalysts perform well at low humidity, while high-loading porous carbon catalysts excel at high humidity. Furthermore, porous carbon catalysts show high mass activity at low current density due to their reduced susceptibility to sulfonate poisoning. On the other hand, solid carbon catalysts facilitate a more uniform ionomer thin-film and create a more active three-phase interface area, resulting in satisfactory performance at high current density and low local-O2 transport resistance.
JOURNAL OF POWER SOURCES
(2023)
Article
Electrochemistry
Zhaowei Zhang, Junya Shao, Junfu Li, Yaxuan Wang, Zhenbo Wang
Summary: This study developed an electrochemical model for lithium batteries and used three methods for current and SOC estimation. The results showed that the extended Kalman filter algorithm (EKF) performed the best in terms of estimation accuracy and convergence speed.
Article
Electrochemistry
Shujian Zhang, Hongmo Zhu, Lanfang Que, Xuning Leng, Lei Zhao, Zhenbo Wang
Summary: This study investigates the effect of carrier film phase conversion time on the properties of polymer electrolytes in all-solid-state lithium-ion batteries. By optimizing the preparation process, the best carrier film phase conversion time was determined to be 40 hours. The optimized polymer electrolyte exhibits high ionic conductivity, excellent cyclic performance, and thermal stability.
Article
Chemistry, Physical
Min Liu, Qiang Zhang, Xueliang Wang, Jianxin Gao, Qianfeng Liu, Erdong Wang, Zhenbo Wang
Summary: Acetic acid-sodium alginate (SA)/NaCl solid anolyte biphasic electrolytes were designed to expand the voltage window and alleviate anode corrosion in the magnesium-air (Mg-air) battery. The prepared SA/NaCl solid electrolyte has a high ionic conductivity and the anode utilization efficiency significantly increased from 9.6% to 61.5%. The assembled Mg-air battery achieved a high open circuit potential (OCP) of 2.59 V, an average discharge voltage of 2.01 V, and a high anode energy density of 2984.5 W h kg(-1) at 0.5 mA cm(-2).
SUSTAINABLE ENERGY & FUELS
(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)
