Article
Chemistry, Applied
Cunyuan Pei, Yameng Yin, Xiaobin Liao, Fangyu Xiong, Qinyou An, Mengda Jin, Yan Zhao, Liqiang Mai
Summary: The most suitable crystal structure for ions storage and the corresponding reaction mechanism for Mg-based batteries remain a challenge. High flexible graphene network supporting different crystal structures of Nb2O5 have been synthesized by a spray-drying-assisted approach. The investigations reveal the different capacities and diffusion kinetics of Nb2O5 crystal structures for Mg-storage and Li-storage.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Materials Science, Ceramics
H. Zhou, Z. Ding, Y. A. Chen, Z. Q. Lan, S. F. Guo, F. Spieckermann, V. Zadorozhnyy, J. Tan, F. S. Pan, J. Eckert
Summary: The hydrogen storage properties of amorphous and crystalline Mg85Ni5Y10 alloys were compared, and the melt-spun alloy showed higher storage capacity and faster kinetics than the induction-melted alloy. The reversible storage capacity of the melt-spun alloy was 4.2 wt% H2, while the induction-melted sample had 3.8 wt% at 200 degrees C. Furthermore, the melt-spun alloy could release 4.1 wt% H2 within 30 min at temperatures above 275 degrees C, close to its theoretical hydrogen storage capacity of 4.2 wt%.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Pengcheng Li, Jutao Hu, Gang Huang, Jianwei Zhang, Weidu Wang, Chengxiang Tian, Haiyan Xiao, Xiaosong Zhou, Huahai Shen, Xinggui Long, Shuming Peng, Xiaotao Zu
Summary: This study investigates the electronic structure, activation, and kinetic properties of TiZrHfMoNb high-entropy alloy doped with active metals. The results demonstrate that electron transfer occurs between active metal atoms and other metal atoms, leading to the destabilization of the surface oxide and improved activation performance. It is believed that this electron transfer process optimizes the electron density of interstitial sites, allowing for increased hydrogen storage capacity. This research provides new insights into the hydrogen storage properties of high-entropy alloys and highlights the potential for further increasing the storage capacity through doping.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
HongXin Li, ChuBin Wan, XiangCao Li, Xin Ju
Summary: The LaMgNi4 alloy shows promising potential as an active material for the negative electrode in Ni/MH batteries, exhibiting high hydrogen storage capacity and good cycling stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Zhiwen Zheng, Cong Peng, Qingan Zhang
Summary: In this work, the hydrogen storage properties of the Mg85Zn6Y9 alloy with 94 wt.% of 18R-type LPSO phase were investigated. The 18R phase easily decomposes into various phases during ball milling under a hydrogen atmosphere. The Mg85Zn6Y9 alloy exhibits better hydrogen storage kinetics and cycle durability compared to pure Mg due to the catalytic effect of YH2/YH3 and the inhibition role of the Laves phase.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Hongsheng Jia, Siqi Li, Yubo Wang, E. Yuanlong, Miao Han, Zhimeng Zhang
Summary: Ti49Zr26Ni25 quasicrystal alloy was synthesized through mechanical alloying and annealing, and the electrocatalytic activity and conductivity were enhanced by doping with porous graphene (PoRGO) synthesized from reduced graphene oxide (RGO) through CO2 activation treatment. The Ti49Zr26Ni25 composites with different amount of PoRGO were prepared by ball milling. The porous Ti49Zr26Ni25 + PoRGO exhibited higher discharge capacity compared to Ti49Zr26Ni25 + CRGO and conventional Ti49Zr26Ni25 alloy in electrochemical hydrogen storage test. The amount of PoRGO dopant had significant influence on the electrochemical properties of Ti49Zr26Ni25. The Ti49Zr26Ni25 alloy electrode modified with 5 wt% PoRGO achieved the highest discharge capacity of 270 mAh/g. The large specific surface area and distinctive porous structure of porous graphene provided more electrochemical active sites and facilitated hydrogen diffusion. Furthermore, PoRGO loading improved the cycling stability, high-rate dischargeability (HRD) and kinetic properties of Ti49Zr26Ni25. Porous graphene has potential as a dopant for the modification of hydrogen storage alloys.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Physical
Jingjing Liu, Jie Xu, Salma Sleiman, Francia Ravalison, Wei Zhu, Hongfei Liu, Honghui Cheng, Jacques Huot
Summary: This paper presents the synthesis, first hydrogenation kinetics, thermodynamics, and cycling effect on the hydrogen storage properties of a V0.3Ti0.3Cr0.25Mn0.1Nb0.05 high entropy alloy. The results show that the alloy has a high hydrogen storage capacity and reversible hydrogen desorption performance, but experiences capacity loss and changes in hydrogen absorption kinetics during cycling.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Abhishek Kumar Patel, Alexandre Duguay, Bernard Tougas, Bettina Neumann, Chris Schade, Pratibha Sharma, Jacques Huot
Summary: Adding Zr + V or Zr + V + Mn to TiFe alloy can improve its microstructure and hydrogen storage properties, promoting the occurrence of the first hydrogenation. The presence of secondary phases similar to Ti2Fe acts as a gateway for hydrogen, resulting in fast hydrogenation and high capacity in the alloy. The rate-limiting step in the hydrogenation process is found to be 3D growth, diffusion controlled with decreasing interface velocity.
Article
Chemistry, Physical
Yan Sun, Dayong Liu, Wanqiang Liu, Heng Liu, Peng Chen, Jianxun Zhao, Yong Cheng, Qingshuang Wang, Xinwei Wang
Summary: The study focused on the preparation of porous polyaniline (PPANI) and reduced graphene oxide (RGO) composites to enhance the electrochemical performance of Co9S8 alloy. Results showed that the PPANI/RGO composite material exhibited superior discharge capacity and kinetic properties, which could be potentially applied in Ni-MH batteries.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Yin Zhang, Hui Yong, Xia Li, Zeming Yuan, Zhonggang Han, Dianchene Feng, Hao Sun
Summary: The addition of Ni element and longer ball-milling time have beneficial effects on the high-rate discharging capabilities and hydrogenation dynamics of Nd-Mg-Ni-based alloys, leading to improved reversible kinetics and electrochemical performance.
Article
Metallurgy & Metallurgical Engineering
Xin Ding, Ruirun Chen, Xiaoyu Chen, Hongze Fang, Qi Wang, Yanqing Su, Jingjie Guo
Summary: Ultrasonic treatment is used to enhance the de-/hydriding properties of Mg-2Ni alloy, resulting in significant refinement and homogenization of the as-cast alloy microstructure. The hydrogen uptake capacities and de-/hydriding rates improve effectively, especially at lower temperature. The refined primary Mg allows for a larger amount of hydrogen absorption, leading to enhanced hydrogenation rates and capacities.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Shujuan Zhou, Li Wang, Wei Xiong, Baoquan Li, Jin Li, Xu Zhang, Jin Xu, Yuyuan Zhao, Huizhong Yan
Summary: A new-type La1.9Y4.1Ni20.8Mn0.2Al H-2-storage alloy was prepared and annealed at 1148 K, showing improved electrochemical kinetics and high discharge performance in cold operating conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Mingxing Wei, Yijin Liu, Xiaofei Xing, Zhao Zhang, Tong Liu
Summary: By introducing a specially designed and synthesized high-entropy alloy catalyst, the hydrogen storage properties of MgH2 have been significantly improved, resulting in faster absorption and desorption rates, lower activation energy, and high capacity retention.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
ChuBin Wan, Weikang Hu, R. Denys, C. C. Nwakwuo, J. K. Solberg, V. A. Yartys
Summary: The study focused on the impact of magnesium content in La3-xMgxNi9 alloys on their structural, hydrogen storage, and electrochemical properties, showing promising performance as active materials for negative electrodes in Nickel-Metal Hydride batteries. The X-ray diffraction results indicated that magnesium substitution for lanthanum promoted the formation of more homogeneous materials with a predominant intermetallic structure. The electrodes exhibited high discharge capacities and cycling stability, making them suitable for high-rate discharge applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Ki Beom Park, Jae-Young Park, Young Do Kim, Julien O. Fadonougbo, Seongtak Kim, Hyo-Kyu Kim, Jang-Won Kang, Hyun-Su Kang, Hyung-Ki Park
Summary: This study investigated the microstructures, hydrogen absorption kinetics, and surface oxides of a Ti0.2Zr0.2Nb0.2V0.2Cr0.17Fe0.03 high entropy alloy (HEA). The presence of high chromium concentration in the oxide layer on the FCC phase ingot significantly increased its reactivity with hydrogen, while the BCC phase ingot did not react with hydrogen, possibly due to the absence of chromium in its oxide layer.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Lvye Fang, Zefan Cai, Zhengqing Ding, Tianyi Chen, Jiacheng Zhang, Fubin Chen, Jiayan Shen, Fan Chen, Rui Li, Xuechang Zhou, Zhuang Xie
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Chemistry, Multidisciplinary
Man Zhang, Weijian Wang, Xianhui Liang, Chang Li, Wenjun Deng, Haibiao Chen, Rui Li
Summary: The newly developed water in salt electrolyte shows great potential in supercapacitors, with a wide electrochemical stability window that allows carbon-based supercapacitors to operate safely and stably at higher voltages, with ultra-long cycle life and excellent energy density.
CHINESE CHEMICAL LETTERS
(2021)
Article
Electrochemistry
Yibo Li, Zhuqing Zhou, Wenjun Deng, Chang Li, Xinran Yuan, Jun Hu, Man Zhang, Haibiao Chen, Rui Li
Summary: In this study, a high-voltage aqueous full potassium-ion battery (AFKIB) with superconcentrated water-in-salt hydrogel electrolyte (WISHE) was developed. The WISHE demonstrated an expanded electrochemical stability window (ESW) and high ionic conductivity, contributing to the superior performance and stability of the assembled AFKIB. This work offers a meaningful approach for designing high-voltage aqueous energy storage devices.
Article
Nanoscience & Nanotechnology
Xinran Yuan, Yibo Li, Yanan Zhu, Wenjun Deng, Chang Li, Zhuqing Zhou, Jun Hu, Man Zhang, Haibiao Chen, Rui Li
Summary: Superconcentrated water-in-salt electrolytes have widened the electrochemical stable window, but come with new challenges such as high cost, high viscosity, and low conductivity. The 2 m low concentration electrolyte using a DMF/H2O hybrid solvent provides a wider stable window, nonflammability, high conductivity, and low viscosity. The addition of DMF promotes stable solid electrolyte interphase formation, enhancing the electrochemical reversibility and cyclability of electrode materials in aqueous electrolytes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Chao Huang, Wenjun Deng, Xinran Yuan, Yi Zhou, Chang Li, Jun Hu, Man Zhang, Jinlin Zhu, Rui Li
Summary: A direct interfacial modification of a Zn anode was achieved by using an acrylic-bonded stationary layer, which led to uniform deposition of zinc ions, balanced local electric field, and improved cycle performance compared to conventional physical coatings.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Chang Li, Yushuang Xu, Wenjun Deng, Na Shen, Yan Chen, Chao Huang, Jinlin Zhu, Runduo Zhu, Wenxia Zou, Rui Li
Summary: In this study, an aqueous iron-organic battery was constructed using polyaniline as the cathode, Fe plate as the anode, and Fe(CF3SO3)2 as the electrolyte. The battery demonstrated a hybrid storage mechanism of iron plating/stripping in the anode and transmission of CF3SO3- in the cathode. The polyaniline-Fe battery exhibited high specific capacity and stable cycle performance, providing a new direction for the development of aqueous iron-ion batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Chang Li, Yushuang Xu, Wenjun Deng, Yi Zhou, Xinyu Guo, Yan Chen, Rui Li
Summary: Researchers successfully synthesized phenylamine-intercalated VOPO4 materials and applied them in aqueous iron-ion batteries. The expanded interlayer spacing provides enough diffusion space, resulting in high specific capacity, excellent rate performance, and cycle stability.
Article
Chemistry, Multidisciplinary
YuShuang Xu, Chang Li, WenJun Deng, JinLin Zhu, Yi Zhou, RunDuo Zhu, Chao Huang, WenXia Zou, Rui Li
Summary: The research on aqueous iron-ion batteries (AIIBs) is limited by the lack of suitable cathode materials. In this study, tunnel-like VO2 is proposed as a cathode material, delivering a high capacity of 198 mA h g(-1) at 0.2 A g(-1). The AIIB shows good cycling performance, retaining 78.9% of its initial capacity after 200 cycles. The unique structure of VO2 and the multiple valence states of vanadium enable the reversible storage of Fe2+ during cycling. This work presents a new choice for the cathode and has considerable development prospects in AIIBs.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Chang Li, Wenjun Deng, Yibo Li, Zhuqing Zhou, Jun Hu, Man Zhang, Xinran Yuan, Rui Li
Summary: The study introduces and synthesizes a novel anode material for aqueous potassium-ion batteries, which demonstrates significant reversible capacity and shows good capacity retention in cyclic tests when assembled with a specific cathode material.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Yibo Li, Wenjun Deng, Zhuqing Zhou, Chang Li, Man Zhang, Xinran Yuan, Jun Hu, Haibiao Chen, Rui Li
Summary: This study presents a rocking-chair type aqueous full K-ion system with high capacity retention, excellent rate performance, and high energy density, demonstrating fast reaction kinetics and high structural stability of the materials used. The system represents the future of advanced energy storage technologies, utilizing KTi2(PO4)(3)/C as the anode material, iron hexacyanoferrate as the cathode, and 21 m KCF3SO3 as the water-in-salt electrolyte.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Wenjun Deng, Zhuqing Zhou, Yibo Li, Man Zhang, Xinran Yuan, Jun Hu, Zhengang Li, Chang Li, Rui Li
Article
Chemistry, Multidisciplinary
Weijian Wang, Wenjun Deng, Xusheng Wang, Yibo Li, Zhuqing Zhou, Zongxiang Hu, Mianqi Xue, Rui Li
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Physical
Wenjun Deng, Xusheng Wang, Chunyi Liu, Chang Li, Jitao Chen, Nan Zhu, Rui Li, Mianqi Xue
ENERGY STORAGE MATERIALS
(2019)
Article
Chemistry, Physical
Tielei Shao, Chang Li, Chunyi Liu, Wenjun Deng, Weijian Wang, Mianqi Xue, Rui Li
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
Article
Chemistry, Physical
Wenjun Deng, Xusheng Wang, Chunyi Liu, Chang Li, Mianqi Xue, Rui Li, Feng Pan
ACS APPLIED ENERGY MATERIALS
(2018)
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)