Article
Chemistry, Multidisciplinary
Kai Guo, Yuting Zhang, Song Yuan, Qinghang Tang, Chen Lin, Pengfei Luo, Jiong Yang, Shusheng Pan, Li-Dong Zhao, Guofeng Cheng, Jiye Zhang, Jun Luo
Summary: This study demonstrates a new Zintl phase material, NaCdSb, with exceptional thermoelectric performance. NaCdSb exhibits semiconductor behavior and shows high power factor and low thermal conductivity. It has great potential for performance improvement as a thermoelectric compound.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Justin Mark, Takao Mori
Summary: A facile bulk ball milling synthesis for ZnCu2P8 was developed and the thermoelectric properties of Zn1-xCu2+xP8 were studied, showing promising performance with low thermal conductivities and enhanced zT values. Further research on controlling the phosphorus stoichiometry is needed to realize the full thermoelectric potential.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Leah Borgsmiller, Qingyuan Li, Michael Y. Toriyama, G. Jeffrey Snyder
Summary: Yb10MgSb9 is a new Zintl compound that shows promise as a thermoelectric material. Undoped Yb10MgSb9 has a low thermal conductivity and high Seebeck coefficient and electrical resistivity. Doping with Na improves the electrical conductivity and thermoelectric performance, elevating the figure of merit, zT, from 0.23 to 1.06 at 873K. This makes Na-doped Yb10MgSb9 a leading p-type Zintl thermoelectric material for high-temperature applications.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Ashlee K. Hauble, Caitlin M. Crawford, Jesse M. Adamczyk, Maxwell Wood, James C. Fettinger, Eric S. Toberer, Susan M. Kauzlarich
Summary: Layered Zintl phases with A2MPn2 stoichiometry are potential thermoelectric materials with complex chemistry. This study focuses on Yb2-xEuxCdSb2 solid solution and investigates the impact of defects on thermal and electronic properties. The research reveals that tuning the defect structure can significantly improve the thermoelectric performance.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Ceramics
Lin Siqi, Li Airan, Fu Chenguang, Li Rongbing, Jin Min
Summary: This paper systematically summarizes the recent progress of growth and thermoelectric properties of Zintl phase Mg3X2 (X=Sb, Bi)-based crystals. The flux Bridgman method is found to be the most effective method for producing large-sized Mg3X2-based crystals. Tuning the chemical composition of Mg3X2-based crystal by doping and forming solid solution is expected to further improve its thermoelectric performance. The aforementioned growth method and research strategies provide significant guidance for the future study of Mg3X2-based crystals.
JOURNAL OF INORGANIC MATERIALS
(2023)
Article
Chemistry, Physical
Kasper Tolborg, Bo B. Iversen
Summary: In intermetallic semiconductors with the cubic Half-Heusler structure, strong covalent bonding between the formal cation and anion was identified, invalidating the traditional Zintl chemistry distinction. This covalence significantly affects the band structure, thermoelectric properties, and response properties of the materials, leading to improved thermoelectric properties in materials that deviate least from the Zintl concept.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zongwei Zhang, Honghao Yao, Qi Wang, Wenhua Xue, Yumei Wang, Li Yin, Xinyu Wang, Xiaofang Li, Chen Chen, Jiehe Sui, Xi Lin, Yue Chen, Xingjun Liu, Jun Mao, Guoqiang Xie, Qian Zhang
Summary: Alloying scattering is effective in reducing thermal conductivity, but the lattice distortion in the alloy also contributes significantly to phonon scattering. Direct observation of lattice distortion in the alloy crystal using scanning transmission electron microscopy shows that tuning the lattice distortion can enhance thermoelectric performance.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Crystallography
Wanyue Peng, Sviatoslav Baranets, Svilen Bobev
Summary: Crystals of a new ternary compound, Ca3InAs3, have been successfully synthesized in the Ca-In-As family. The compound crystallizes in the orthorhombic space group and has InAs4 tetrahedra as the smallest building motifs. Electronic structure calculations confirm the opening of a bandgap and show intermediate covalent/ionic interactions between Ca and As, as well as strong covalent features of the In-As interactions.
Article
Physics, Applied
Jiaxi Wang, Jia Li, Yafan Wang, Fuli He, Qian Zhang, Guang Wang, Yuming Jin, Fuxing Yin
Summary: Two strategies were proposed to optimize the thermoelectric performance of BaMg2(Bi,Sb) through a solid solution method, resulting in decreased weight carrier mobility with an increase in Sb content. BaMg2SbBi exhibited a lower lattice thermal conductivity of 0.45 W m(-1)K(-1) and achieved a ZT value of around 0.88 at 750 K under n-type doping conditions, indicating a significant contribution to the ZT maximization. Tensile strain was found to significantly improve the ZT values of BaMg2Bi2, BaMg2SbBi, and BaMg2Sb2 when applied. Adjusting the crystal field splitting energy also plays a role in optimizing the ZT value.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Kasey P. Devlin, Shunda Chen, Davide Donadio, Susan M. Kauzlarich
Summary: Solid solutions of Yb(2-x)A(x)CdSb(2) (A = Ca, Sr, Eu; x <= 1) exhibit different crystal structures, with structural transitions occurring with increased Ca content, impacting thermoelectric properties.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Takahiro Yamada, Masato Yoshiya, Masahiro Kanno, Hiroshi Takatsu, Takuji Ikeda, Hideaki Nagai, Hisanori Yamane, Hiroshi Kageyama
Summary: Tin-based intermetallics with tunnel frameworks containing zigzag Na chains that excite correlated rattling impinging on the framework phonons are attractive as thermoelectric materials due to their low lattice thermal conductivity. The correlated rattling of Na atoms in the zigzag chains and the origin of the low thermal conductivity is uncovered through experimental and computational analyses. These findings reveal that phonon scattering by the correlated rattling Na chains is enhanced when there is a shorter inter-rattler distance, suggesting potential strategies for the development of thermoelectric materials with low thermal conductivity.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yifang Huang, Chen Chen, Weiming Zhang, Xiaofang Li, Wenhua Xue, Xinyu Wang, Yijie Liu, Honghao Yao, Zongwei Zhang, Yue Chen, Feng Cao, Xingjun Liu, Yumei Wang, Qian Zhang
Summary: This paper reports a new Zintl-phase thermoelectric material BaAgSb, which achieved a high ZT value through doping and defect engineering to improve its thermoelectric performance.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Aixian She, Yinchang Zhao, Jun Ni, Sheng Meng, Zhenhong Dai
Summary: In this study, the thermal, electronic transport, and thermoelectric properties of anisotropic orthorhombic KMgBi crystal were systematically investigated. The layered structure of KMgBi leads to strong anisotropy, with better electron transport along the a(b)-axis compared to the c-axis. The high power factor obtained along the a(b)-axis makes KMgBi a promising candidate for high-temperature thermoelectric applications.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Physical
Wenkai Le, Wenwen Sheng, Runtao Liu, Minhui Yuan, Wenwei Yang, Jingyi Lv, Li Yin, Chen Chen, Xinyu Wang, Zongwei Zhang, Kejia Liu, Tianchi Wang, Qian Zhang, Jing Shuai
Summary: In this study, Eu0.5Ca0.5Zn2-xMgxSb2 compounds were prepared using ball milling and spark plasma sintering methods. The results show that the thermoelectric performance of Eu0.5Ca0.5Zn2Sb2 was significantly improved through the ball milling and hot-pressing preparation process, and Mg substitution further increased its thermoelectric performance by regulating the thermal conductivity. The obtained high thermoelectric performance in this work provides a reference for improving the properties of other CaAl2Si2 structure Zintl thermoelectric materials.
MATERIALS TODAY ENERGY
(2022)
Article
Chemistry, Physical
Katarzyna Posmyk, Natalia Zawadzka, Mateusz Dyksik, Alessandro Surrente, Duncan K. Maude, Tomasz Kazimierczuk, Adam Babinski, Maciej R. Molas, Watcharaphol Paritmongkol, Miroslaw Maczka, William A. Tisdale, Paulina Plochocka, Michal Baranowski
Summary: This study reveals the exciton fine structure of (PEA)2PbI4 single crystals using low temperature magneto-optical spectroscopy and provides valuable quantification of the fine structure splitting in (PEA)2PbI4. The results support the standard multiband, effective-mass theories for the exciton fine structure in 2D perovskites.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Yao Lu, Xiang Li, Kefeng Cai, Mingyuan Gao, Wenyu Zhao, Jiaqing He, Ping Wei
Summary: In this study, a flexible PEDOT:PSS/Cu2Se-based nanocomposite film was prepared on a nylon membrane using vacuum filtration and hot pressing, demonstrating significantly improved thermoelectric properties. The optimized film showed a high power factor at 400K and excellent flexibility, retaining 85% of the power factor after 1000 bending cycles. Additionally, when paired with n-type PEDOT/Ag2Se/CuAgSe films, a flexible TE generator produced a maximum voltage and power output at a temperature difference of 44K.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Qi Gao, Wu Wang, Yao Lu, Kefeng Cai, Yating Li, Zixing Wang, Miaomiao Wu, Changjun Huang, Jiaqing He
Summary: A high power factor and excellent flexibility Ag/Ag2Se composite film was fabricated on a flexible nylon membrane using wet chemical synthesis and vacuum-assisted filtration techniques. The optimized composite film showed high power factor and electrical conductivity at room temperature, and retained conductivity after repeated bending cycles. This work provides a new strategy for synthesizing flexible thermoelectric films with high power factor and electrical conductivity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Miaomiao Wu, Kefeng Cai, Xiang Li, Yating Li, Ying Liu, Yiming Lu, Zixing Wang, Wenyu Zhao, Ping Wei
Summary: We developed a facile method to fabricate a low-cost, flexible, and high-thermoelectric-performance composite film on a nylon membrane. The film exhibited a porous network-like microstructure and showed good power factor and flexibility at room temperature.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yating Li, Qing Lou, Jianmin Yang, Kefeng Cai, Ying Liu, Yiming Lu, Yang Qiu, Yao Lu, Zixing Wang, Miaomiao Wu, Jiaqing He, Shirley Shen
Summary: This study successfully prepared flexible Ag2Se/Se/polypyrrole (PPy) composite films with high power factor and exceptional flexibility. The composite film showed promising thermoelectric properties, indicating great potential for practical applications in wearable devices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zixing Wang, Qi Gao, Wu Wang, Yao Lu, Kefeng Cai, Yating Li, Miaomiao Wu, Jiaqing He
Summary: This study introduces a high-performance Ag2Se/Ag/PEDOT composite film with high electrical conductivity and flexibility. By utilizing PEDOT coated Se nanowires as templates, PEDOT coated Ag2Se/Ag composite powders were prepared and then fabricated into composite films. The flexibility of the composite film is attributed to the synergistic effect of the nylon membrane and PEDOT, which also contribute to its excellent electrical conductivity and thermoelectric performance.
MATERIALS TODAY PHYSICS
(2021)
Article
Materials Science, Composites
Yiming Lu, Ying Liu, Yating Li, Kefeng Cai
Summary: Ga-doped Ag2Se flexible films were successfully prepared on porous nylon membrane by wet chemical synthesis of Se nanowires as templates, exhibiting excellent mechanical and electrical properties, with a remarkable ability to maintain high electrical conductivity even after a large number of bending cycles.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yuexin Liu, Xiaoyu Li, Mingyuan Gao, Xuxia Hao, Jiajia Li, Ying Liu, Yanxia Li, Kefeng Cai
Summary: Graphene fibers, with their high electrical conductivity, mechanical strength, and multidimensional flexibility, are ideal for wearable devices. However, their energy density needs improvement. In this study, a fibrous supercapacitor loaded with battery-type active material was developed to increase the energy density of graphene fibers.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Miaomiao Wu, Jiajia Li, Ying Liu, Zixing Wang, Ping Wei, Wenyu Zhao, Kefeng Cai
Summary: Flexible thermoelectric (TE) generators have potential to power wearable devices using temperature difference between human body and environment. In this study, Ag2S films with different amounts of Se substitution were prepared to improve TE performance, and the film with Se/Ag2S molar ratio of 0.6 showed the best power factor. The film also possessed excellent flexibility and the TE generator assembled with it exhibited a power density of 6.6 W/m2. This work provides a new route to low-cost, high-performance Ag2S-based TE films with ultrahigh flexibility.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Zixing Wang, Ying Liu, Jiajia Li, Changjun Huang, Kefeng Cai
Summary: This study presents a facile method to prepare a high-performance Ag2Se thermoelectric film, which exhibits a high power factor and good flexibility. Additionally, a flexible TE generator assembled from the optimized film legs demonstrates significant power output under a temperature gradient.
MATERIALS TODAY PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Ying Liu, Yating Li, Miaomiao Wu, Yiming Lu, Zixing Wang, Ping Wei, Wenyu Zhao, Kefeng Cai
Summary: In this study, a flexible Ag2Se/Se composite film with a high power factor was fabricated on a nylon membrane. The film, which has a high density and contains well-crystallized Ag2Se grains and embedded Se nanoinclusions, exhibits excellent flexibility and a comparatively large room-temperature power factor and Seebeck coefficient of up to 2023 μW m(-1) K-2 and -155 μV K-1, respectively. The high Seebeck coefficient is attributed to the energy-filtering effect caused by the Se/Ag2Se heterointerface. The assembled flexible thermoelectric generator (4-leg) demonstrates a maximum output power of 1135 nW and a power density of up to 16.4 W m(-2) when the applied temperature difference is 30 K. This work offers a feasible method to design high-performance and low-cost flexible thermoelectric generators for wearable electronics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Mingyuan Gao, Jian Huang, Yuexin Liu, Xiaoyu Li, Ping Wei, Jinhu Yang, Shirley Shen, Kefeng Cai
Summary: In this study, NiCo-layered double hydroxide (NiCo-LDH)/NiCoOOH composite films with both ultrahigh mass loading and high areal capacity were successfully prepared by a two-step cyclic voltammetry method. The films possess a hierarchical microstructure with highly ordered pore distribution and abundant defect active sites, which promote electrolyte ion transport and enhance active material utilization. The optimized film exhibits not only a state-of-the-art high areal capacity and energy density, but also remarkable mechanical stability and capacity retention.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Jiajia Li, Ying Liu, Zixing Wang, Lidong Chen, Kefeng Cai
Summary: Flexible thermoelectric generators (f-TEGs) have attracted much attention for their practicality in smart wearable devices. In this study, ultra-flexible self-supporting Ag2Se/nylon composite films were prepared by a rapid method, which demonstrated excellent TE properties and flexibility. The optimized composite film achieved a maximum power factor of 73.7 μW m-1 K-2 at room temperature and maintained its performance even after being bent 4000 times. Furthermore, a 3-leg f-TEG assembled with the composite film showed good TE performance and can be used as a self-powered temperature sensor.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Zixing Wang, Ying Liu, Jiajia Li, Changjun Huang, Kefeng Cai
Summary: Flexible Ag2Se thermoelectric films with high performance have been successfully fabricated on a nylon membrane using a simple method. The optimized Ag2Se film exhibits good flexibility and a high power factor, which enables its potential application in flexible thermoelectric generators near room temperature.
Article
Materials Science, Composites
Xiaowen Han, Xinru Zuo, Ying Liu, Zixing Wang, Kefeng Cai
Summary: A facile method for preparing flexible p-type CuI/PVP nanocomposite thermoelectric film is developed. The film shows a large Seebeck coefficient and power factor, as well as excellent flexibility.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Chemistry, Physical
Ying Liu, Yiming Lu, Zixing Wang, Jiajia Li, Ping Wei, Wenyu Zhao, Lidong Chen, Kefeng Cai
Summary: This study develops a novel and facile method to fabricate a flexible Ag2Se thermoelectric film on a nylon substrate, which exhibits excellent thermoelectric properties and good flexibility due to its high density, good crystallinity, and semi-coherent and coherent grain boundaries.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
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)
