Article
Engineering, Environmental
Liu Yang, Shao-hua Luo, Yafeng Wang, Yang Zhan, Qing Wang, Yahui Zhang, Xin Liu, Wenning Mu, Fei Teng
Summary: Cu-doped layered P2-type Na0.67Ni0.33-xCuxMn0.67O2 materials were prepared and investigated for sodium-ion batteries. The introduction of Cu2+ ions improved the capacity retention, cycling stability, and rate performance by stabilizing the P2-phase structure and facilitating reversible capacity based on Cu2+/Cu3+ redox reaction.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Junghoon Yang, Jin-Myoung Lim, Mihui Park, Gi-Hyeok Lee, Suwon Lee, Maenghyo Cho, Yong-Mook Kang
Summary: Layer-structured oxide cathodes have various phases depending on Na ion contents, with off-stoichiometry impacting properties like capacity and cyclic stability. Thermal activation process helps maintain stoichiometry, reduce Na ion loss, and improve electrochemical performance of materials.
ADVANCED ENERGY MATERIALS
(2021)
Article
Energy & Fuels
Saban Patat, Ayse Sahin, Yusuf Tas, Ferhat Sanli, Yakup Yilmaz, Tayfur Ozturk
Summary: A novel O3-NaMn0.42Fe0.42Ni0.17O2 cathode material for sodium-ion batteries was successfully synthesized using a co-precipitation method followed by solid-state reaction. The substitution of Ni2+, Cu2+, and Ca2+ for Fe3+ and Mn4+ improved the structural stability and electrochemical performance of the O3-NaMn0.33Fe0.33Ni0.21Cu0.08Ca0.04O2 cathode material. When combined with a hard carbon anode, the full cell exhibited an energy density of 220 Wh kg(-1) and 100% capacity retention after 56 charge/discharge cycles.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Gaoqin Su, Lijiang Li, Zhe Shi, Xiaobo Ma, Ling Ma, Zhijie Cao
Summary: In this study, a new Li-doped P2-Na0.8Li0.15-Cu0.1Mn0.75O2 cathode material was designed, and the electrochemical performances of both materials were systematically investigated. The doped sample showed higher reversible capacity, better rate capability, and stronger cycling stability compared to the undoped sample. These improvements are believed to result from the positive effect of Li on triggering anionic redox and facilitating ion and electron diffusion during the sodiation/desodiation process.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Zhengbo Liu, Chaojin Zhou, Jun Liu, Lichun Yang, Jiangwen Liu, Min Zhu
Summary: Element doping is a common method for improving the performance of cathode materials in batteries. This study successfully transformed an O3-type cathode into a P2-type cathode using a simple Li/F co-doping route. The modified P2-type cathode showed higher Na content, solid solution reaction in a high-voltage range, and a stronger TM-F bond. This research provides a new idea and reference for synthesizing high-performance P2-type layered oxide cathode materials for sodium-ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Lijiang Li, Gaoqin Su, Chu Lu, Xiaobo Ma, Ling Ma, Hailong Wang, Zhijie Cao
Summary: Li doping plays a crucial role in enhancing the performance of layered oxide cathodes by activating the anionic redox reaction, leading to increased reversible capacity, improved rate capability, and enhanced cycling stability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Xiaoli Chen, Zebi Zhao, Kai Huang, Haolin Tang
Summary: The study developed a stable P2-Na0.6Li0.15Al0.15Mn0.7O2 sodium cathode, which exhibited good rate performance and initial reversible capacity. Investigations into multiple characteristics revealed that this new cathode does not undergo phase transition during cycling processes.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Energy & Fuels
Longjiao Chang, Ruifen Yang, Xiaolong Bi, Wei Yang, Kedi Cai, Anlu Wei, Jianan Liu
Summary: P2 layered oxide cathode materials, particularly P2-NaNMO, are highly favored for sodium ion batteries due to their advantages such as high energy density, various types, simple synthesis, and low environmental pollution. However, issues such as diffusion barrier, structural stability, and phase transition at high voltages affect the practical use of P2-NaNMO. Thus, research on modification methods to enhance the stability and performance of P2-NaNMO under high operating voltage is crucial.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Dohyeong Kwon, Sung-Joon Park, Jaewoon Lee, Sangeon Park, Seung-Ho Yu, Duho Kim
Summary: An intriguing mechanism for enabling fast Na kinetics during oxygen redox (OR) is proposed to produce high-power-density cathodes for sodium-ion batteries based on the P2-type oxide models Na-2/3[Mn6/9Ni3/9]O-2 (NMNO) and Na-2/3[Ti1/9Mn5/9Ni3/9]O-2 (NTMNO) using the potential pillar effect. The NTMNO interlayer distance moderately decreases upon charging with oxygen oxidation, whereas that of NMNO decreases at a much faster rate. Fundamental electrochemical experiments clearly indicate that the Ti doping of the bare material significantly improves its rate capability during OR, and detailed electrochemical and structural analyses show much faster Na kinetics for NTMNO than for NMNO. A systematic comparison of the two cathode oxides based on experiments and first-principles calculations establishes the potential pillar concept of not only improving the sluggish Na kinetics upon OR reaction but also harnessing the full potential of the anionic redox for high-power-density SIBs.
Article
Materials Science, Ceramics
Shengxue Yan, Shaohua Luo, Liu Yang, Jian Feng, Pengwei Li, Qing Wang, Yahui Zhang, Xin Liu
Summary: This study introduced the concept of applying medium-entropy oxides (MEOs) in sodium-ion batteries, emphasizing the importance of entropy stabilization in material performance and battery cycling. The research also revealed that configurational entropy is the main factor affecting the structural and cycle stability of the electrode material. These findings suggest that the rational design of MEOs with novel structures and different electrochemically active elements may lead to high-performance SIB cathode materials in next-generation energy storage devices.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Chemistry, Physical
Jinsen Jiang, Hung-Chieh He, Chen Cheng, Tianran Yan, Xiao Xia, Manling Ding, Le He, Ting-Shan Chan, Liang Zhang
Summary: Cu-substituted P2-type cathode materials were fabricated and investigated for their improved electrochemical performances. It was found that Cu dopants stabilized the crystal structure, improved cycling stability, and facilitated charge transfer kinetics. Cu substitution also enhanced the moisture stability of the cathode materials. This work provides promising guidance for the design of low-cost, high-performance, and air-stable cathode materials for SIBs.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Jun Xiao, Hong Gao, Kaikai Tang, Mengqi Long, Jun Chen, Hao Liu, Guoxiu Wang
Summary: This study reports the synthesis of a layered P2-type Mn-based Na0.7Li0.06Zn0.06Ni0.21Mn0.67O2 material by partially substituting Ni with Li and Zn. The resulting material exhibits a stable crystal structure and shows excellent cycle life and electrochemical kinetics during the electrochemical process. It is a promising cathode material for sodium ion batteries.
Review
Engineering, Environmental
Zhi-Xiong Huang, Zhen-Yi Gu, Yong-Li Heng, Edison Huixiang Ang, Hong-Bo Geng, Xing-Long Wu
Summary: This article reviews the research progress of layered oxide cathodes in sodium-ion batteries and potassium-ion batteries, discusses their performances, challenges, and prospects, and proposes solutions to overcome these challenges for the design of layer oxides with exceptional performances.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Claude Delmas, Dany Carlier, Marie Guignard
Summary: This paper provides an overview of research on lithium and sodium layered materials as positive electrodes in lithium (sodium)-ion batteries, focusing on the solid-state chemistry's role in discovering new materials and optimizing properties for different applications. Layered structures, especially lithium-based ones, are considered as the best candidates for high energy density batteries for mobile applications. Through high-temperature solid-state chemistry, many substituted phases have been obtained to stabilize the layered structure and increase the specific capacity.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Guohua Zhang, Jiayi Li, Yuxin Fan, Yukun Liu, Ping Zhang, Xinyue Shi, Jiwei Ma, Renyuan Zhang, Yunhui Huang
Summary: P2-type Fe/Mn-based layered oxide cathode has attracted significant attention for its low cost, low toxicity, earth abundance, and high theoretical capacity in sodium-ion battery applications. However, the harmful P2-P2' phase transition associated with the Jahn-Teller effect of Mn3+ during the discharge process limits its cycling stability. In this study, Al-doping is proposed as an effective strategy to suppress the phase transition and improve the cycling stability and rate capability of the electrode.
ENERGY STORAGE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yanfei Li, Shuyang Ye, Jian Lin, Yihan Song, Xinglong Wu, Jingping Zhang, Changlu Shao, Zhongmin Su, Haizhu Sun, Dwight S. Seferos
Summary: In this study, a pore-forming strategy based on the redox chemistry of metallic oxide nanodots was developed to prepare porous carbon substrates for lithium metal batteries. The substrates effectively prevent dendrite formation and volume change, and have uniform ion flux and electric field distribution.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xinxin Zhao, Zhenyi Gu, Jinzhi Guo, Xiaotong Wang, Haojie Liang, Dan Xie, Wenhao Li, Wanqing Jia, Xinglong Wu
Summary: By redistributing solvents and inducing electrochemical reactions, a bidirectional fluorine-rich electrode/electrolyte interphase (EEI) is constructed to promote the long-term cycle stability of batteries. The fluorinated organics in the epitaxy and the hemi-carbonate content contribute to the ample Na+ transport ability of the obtained cathode electrolyte interphase (CEI), significantly enhancing the electrochemical long cycling performance of the batteries.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dan Xie, Yuan Sang, Dan-Hong Wang, Wan-Yue Diao, Fang-Yu Tao, Chang Liu, Jia-Wei Wang, Hai-Zhu Sun, Jing-Ping Zhang, Xing-Long Wu
Summary: A high-quality and ZnF2-riched inorganic/organic hybrid solid electrolyte interface (SEI) layer was constructed on the surface of Zn metal anode (ZMA) by introducing multifunctional fluoroethylene carbonate (FEC) into aqueous electrolyte. The addition of FEC effectively regulated the solvated structure of Zn2+ and hindered the formation of dendrites, thus suppressing dendrites growth and parasitic reactions. The ZMA in FEC-included ZnSO4 electrolyte exhibited a long cycle life and stable coulombic efficiency.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Jia-Lin Yang, Xin-Xin Zhao, Wei Zhang, Kai Ren, Xiao-Xi Luo, Jun-Ming Cao, Shuo-Hang Zheng, Wen-Liang Li, Xing-Long Wu
Summary: A cellulose-based composite separator (CP@PPC) was successfully prepared by incorporating poly(propylene carbonate) (PPC) into cellulose-based separators (CP). The CP@PPC separator exhibited stable operation at high voltages, high Na+ transference number and excellent cyclic performance. This study highlights the importance of electrolyte analogs in separator modification for designing durable devices in advanced energy storage systems.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Yang Su, Yan-Fei Li, Shen-Gen Gong, Yi-Han Song, Bing Li, Xing-Long Wu, Jing-Ping Zhang, Dong-Tao Liu, Chang-Lu Shao, Hai-Zhu Sun
Summary: According to the study, the design and synthesis of a heteroatom co-doped composite TiO2@MoSe2/RGO can improve the electrochemical performance and cycling stability of sodium-ion storage devices.
APPLIED SURFACE SCIENCE
(2023)
Review
Engineering, Environmental
Zhi-Xiong Huang, Zhen-Yi Gu, Yong-Li Heng, Edison Huixiang Ang, Hong-Bo Geng, Xing-Long Wu
Summary: This article reviews the research progress of layered oxide cathodes in sodium-ion batteries and potassium-ion batteries, discusses their performances, challenges, and prospects, and proposes solutions to overcome these challenges for the design of layer oxides with exceptional performances.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Materials Science, Multidisciplinary
Jun-Ming Cao, Igor Zatovsky, Zhen-Yi Gu, Jia-Lin Yang, Xin-Xin Zhao, Jin-Zhi Guo, Haiyang Xu, Xing-Long Wu
Summary: Synergistic integration between carbon matrix and 2D MXene enables versatile serving scenarios for MXene-based hybrid materials in various fields. The combination of multidimensional carbonaceous matrix with 2D MXene can enhance the intrinsic strength of MXene and create different structures for different purposes. This review provides a comprehensive discussion on the structural integration of carbon matrix and MXene, including design principles, synthetic routes, and the relationship between the two components. It also analyzes the texture features and structure-property relationships of 2D MXene-based composites with different dimensional carbon matrix. Challenges and future research perspectives for MXene-based materials and hybridization with carbonaceous matrix of different dimensionalities are also discussed.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Miao Du, Kai-Di Du, Jin-Zhi Guo, Yan Liu, Vanchiappan Aravindan, Jia-Lin Yang, Kai-Yang Zhang, Zhen-Yi Gu, Xiao-Tong Wang, Xing-Long Wu
Summary: The direct reuse of retired LIBs cathode materials is an optimal choice for waste-to-wealth due to its sustainability and high economic efficiency. In this study, the spent oxide cathode materials are directly applied to SIBs, showing promising application possibilities. The spent oxide cathode exhibits appropriate initial discharge capacity, decent cycle performance, and relatively good electrode kinetics performance. This waste-to-wealth concept provides an economical and sustainable strategy for reusing retired LIBs and supplying raw material for large-scale application of SIBs.
Article
Chemistry, Physical
Yue-Ming Li, Zhi-Wei Wang, Wen-Hao Li, Xiao-Ying Zhang, Cong Yin, Kai Li, Wei Guo, Jing-Ping Zhang, Xing-Long Wu
Summary: By constructing a nanopore structure on a copper foam framework, a 3D electrode with trinary nanogradients was prepared, including conductivity-dielectric, zincophilicity, and electrolyte concentration. This structure enables reversible plating/stripping with an average Coulombic Efficiency (CE) of 99.5% over 3000 cycles. A full battery with a 3D lean-zinc anode and NH4V4O10 as the cathode was assembled, which can be cycled stably for 500 cycles (2 A g-1).
ENERGY STORAGE MATERIALS
(2023)
Review
Engineering, Chemical
Mingyang Ma, Miao Du, Yan Liu, Hongyan Lue, Jialin Yang, Zelin Hao, Jinzhi Guo, Xinglong Wu
Summary: The demand for large-scale energy storage is increasing due to the decreasing non-renewable resources and deteriorating environmental pollution. Developing rechargeable batteries with high energy density and long cycle performance is an ideal choice to meet the demand of energy storage system.
Article
Chemistry, Inorganic & Nuclear
Fang-Yu Tao, Dan Xie, Xin-Fang Liu, Hong-Yan Lue, Wan-Yue Diao, Jia-Lin Yang, Wen-Liang Li, Xing-Long Wu
Summary: A lithiophilic Li-B alloy layer is constructed on the lithiophobic Ni foam to promote the growth of Li metal and inhibit dendrite formation. This modification also reduces concentration polarization near the electrode. The resulting electrode shows improved stability and low overpotential.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Physics, Multidisciplinary
Kai-Yang Zhang, Yan-Qiu Fu, Han-Hao Liu, Jia-Lin Yang, Meng-Yuan Su, Yinglin Wang, Xing-Long Wu
Summary: This study demonstrates the synthesis of N-doped hard carbon material using peptone as a precursor through one-step annealing method. The prepared material exhibits excellent electrochemical performance, making it a promising candidate for sodium ion batteries.
Article
Chemistry, Physical
Shuo-Hang Zheng, Xiao-Tong Wang, Zhen-Yi Gu, Hong-Yan Lu, Xin-Yi Zhang, Jun-Ming Cao, Jin-Zhi Guo, Xiao-Tong Deng, Ze-Tao Wu, Rong-Hua Zeng, Xing-Long Wu
Summary: Due to the rapid development of electric vehicles and new energy storage, there has been a sharp increase in the demand for lithium-ion batteries. However, this increase in battery production has also led to a significant number of spent batteries, which poses a potential risk of environmental pollution and resource waste. Therefore, it is crucial to recover these spent lithium-ion batteries. This study presents an efficient, low-cost, and ultrafast regeneration strategy for the rapid regeneration of spent LiFePO4 in just 20 seconds.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Multidisciplinary
Fang-yu Tao, Dan Xie, Wan-Yue Diao, Chang Liu, Hai-Zhu Sun, Wen-Liang Li, Jing-Ping Zhang, Xing-Long Wu
Summary: We report the fabrication of a highly-stable lithium metal battery using a Ti3C2Tx MXene-modified carbon foam. The modified carbon foam reduces local current density and absorbs volume expansion during cycling. The lithiophilicity of Ti3C2Tx MXene reduces Li nucleation overpotential and guides uniform Li deposition. Experimental results demonstrate excellent cycling stability and capacity of the fabricated lithium metal battery.
NEW CARBON MATERIALS
(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)