Article
Chemistry, Physical
Francisco J. A. Loureiro, Devaraj Ramasamy, Sergey M. Mikhalev, Aliaksandr L. Shaula, Daniel A. Macedo, Duncan P. Fagg
Summary: Protonic ceramic fuel cells show promise for energy conversion at intermediate temperatures. High order nickelates could be attractive cathode materials due to their high electrical conductivities. Composite cathodes in this study show improved performance, especially in wet O-2 conditions, with the correction of potential measurement biases.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
In -Ho Kim, Dae-Kwang Lim, Yeon Namgung, Hohan Bae, Jun-Young Park, Sun-Ju Song
Summary: In this study, the electrochemical and transport properties of a perovskite-type proton conductor BZCYYb5311 were evaluated. The material showed high proton conductivity and exceptional chemical stability. It exhibited a proton conductivity of 98% compared to ionic conductivity at 600°C. The maximum power density in fuel cell mode and current density in electrolysis mode were calculated, indicating the potential of BZCYYb5311 as a fuel cell material.
Article
Chemistry, Physical
Chanho Kim, Hyungjun Lee, Inyoung Jang, Sungmin Kim, Hoyeon Jung, Myeungwoo Ryu, Jeongheon Kim, Dongsoo Lee, Heesung Yoon, Ungyu Paik, Taeseup Song
Summary: This study dramatically improved the power generation performance of proton conducting fuel cells (PCFCs) by forming a triple conducting material, BCFZY, on the electrodes. The use of BCFZY nanoparticles provided a charge passage and effectively expanded the reaction site, resulting in an enhanced power density of PCFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Min Fu, Kailin Li, Yang Yang, Qiaoling Zeng, Long Zeng, Zetian Tao
Summary: The new composite cathode material consisting of LaNi0.6Fe0.4O3-δ (LNF) and Sm0.5Sr0.5CoO3-δ (SSC), namely LNF-SSC73, shows promising electrochemical performance in proton-conducting solid oxide fuel cells, indicating its potential for improving fuel cell performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Francisco J. A. Loureiro, Devaraj Ramasamy, Vanessa C. D. Graca, Laura I. V. Holz, Sergey M. Mikhalev, Duncan P. Fagg
Summary: This study introduces a composite cathode of La4Ni3O10 +/-delta and BaCe0.9Y0.1O3-delta, and analyzes its performance through electrochemical impedance spectroscopy. The research demonstrates the behavior of the composite electrode under various conditions, and offers a robust analysis methodology for researchers in the fuel cell field.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Ceramics
Mingyang Zhou, Zhijun Liu, Meilong Chen, Ziyi Zhu, Dan Cao, Jiang Liu
Summary: Protonic ceramic fuel cells (PCFCs) using BaZr0.8-xCexY0.2O3-delta (BZCY) as electrolyte materials were studied for their electrochemical performance and chemical stability. The results showed that increasing Ce4+ content reduced electronic hole conductivity, especially at high temperature. H-2 atmosphere decreased the conductive activation energy of BZCY, while air atmosphere caused electronic leakage. The operation of PCFCs demonstrated that higher Ce4+ content resulted in higher open-circuit voltage and output power density. However, lower Ce4+ content stabilized the materials in CO2 atmosphere.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Xuan Yang, Yanru Yin, Shoufu Yu, Lei Bi
Summary: The BSCF+Co3O4 composite material is found to be a promising cathode for H-SOFCs, offering a solution to the thermal mismatch problem between the cathode and electrolyte. The addition of Co3O4 enhances the contact between the BSCF cathode and the electrolyte and also improves the catalytic activity of the cathode, resulting in significantly improved performance for H-SOFCs.
SCIENCE CHINA-MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Xiuqing Lv, Huili Chen, Wei Zhou, Si-Dian Li, Fangqin Cheng, Zongping Shao
Summary: In this study, the issue of CO2 poisoning in SrCoO3-delta 5-based materials was addressed by co-doping iron, zirconium, and yttrium. The newly formed material, SCFZY, exhibited significant CO2-tolerance as a cathode for solid oxide fuel cells (SOFCs), along with high power density and good durability.
Article
Materials Science, Multidisciplinary
Akihiro Ishii, Hua Huang, Yuqing Meng, Shenglong Mu, Jun Gao, Jincheng Lei, Fei Peng, Hai Xiao, Jianhua Tong, Kyle S. Brinkman
Summary: This study successfully addressed the issue of cracks in proton-conducting ceramic electrolytes during wet processing by utilizing saturated-hydrocarbon-based slurries. By optimizing the slurry composition and laser sintering conditions, a high-quality membrane with proton conductivity was prepared rapidly.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Multidisciplinary
Inna A. Starostina, George N. Starostin, Mariam T. Akopian, Gennady K. Vdovin, Denis A. Osinkin, Baptiste Py, Adeleke Maradesa, Francesco Ciucci, Dmitry A. Medvedev
Summary: The low-temperature transport properties of BaSn0.8Y0.2O3-delta, a representative of proton-conducting materials, were investigated. The study focused on the grain and grain boundary conductivity of this ceramic material under various experimental conditions. Electrochemical impedance spectroscopy was used to analyze the electrolytic processes and evaluate the resistance, capacitance, and frequency. The results showed that the BSY ceramic prepared with CuO as a sintering additive exhibited three distinct processes related to grain response and the responses of pure and CuO-covered grain boundaries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Mingzhuang Liang, Fan He, Chuan Zhou, Yubo Chen, Ran Ran, Guangming Yang, Wei Zhou, Zongping Shao
Summary: By systematically investigating partial doping of different metal elements in BaCo0.4Fe0.4Zr0.1Y0.1O3-delta (BCFZY), Ba(Co0.4Fe0.4Zr0.1Y0.1)0.95Ni0.05O3-delta (BCFZYN) was found to exhibit the lowest polarization impedance and achieve high ORR activity. Nickel doping in BCFZYN improves oxygen mobility, surface exchange kinetics, and bulk oxygen ion and proton conductivity, leading to outstanding operational stability in SOFCs.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Ceramics
Dongyoung Kim, Seung Jae Son, Minseok Kim, Hee Jung Park, Jong Hoon Joo
Summary: The study reveals that PBF exhibits proton conductivity at intermediate temperatures and excellent performance and stability in symmetrical PCFCs, making it a promising alternative material.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Yufeng Li, Yangsen Xu, Yanru Yin, Hailu Dai, Yueyuan Gu, Lei Bi
Summary: A new medium entropy material LCFMN is proposed as a cathode for H-SOFCs, which solves the issues of traditional lithiated oxide cathodes and achieves high fuel cell performance and stability.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Materials Science, Ceramics
Rui Guo, Lei Yang, Yaowen Wang, Youcheng Xiao, Rui Guan, Mengjiao Wang, Tianmin He
Summary: In this study, a Cu-doped B-site BaZrO3-based electrolyte material was designed and synthesized, and the effects of Cu doping on its crystal structure, sintering and electrical properties were investigated. Results showed that the BZCYCu(0.05) sample exhibited the highest sintering density and total conductivity. The increased conductivity in BZCYCu(0.05) was attributed to its high apparent specific grain-boundary conductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Zheyu Luo, Yucun Zhou, Xueyu Hu, Nichloas Kane, Tongtong Li, Weilin Zhang, Zhijun Liu, Yong Ding, Ying Liu, Meilin Liu
Summary: Proton-conducting electrolytes have high ionic conductivity at intermediate temperatures and are receiving increasing attention. The effect of B-site dopants on the properties of doped barium hafnate-cerate electrolyte materials has not been systematically studied. The results show that electrical conductivity, ionic transference number, chemical stability, and compatibility with NiO are closely correlated with the dopant size.
ENERGY & ENVIRONMENTAL SCIENCE
(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)