Article
Electrochemistry
K. Siwek, S. Eugenio, I Aldama, J. M. Rojo, J. M. Amarilla, A. P. C. Ribeiro, T. M. Silva, M. F. Montemor
Summary: Tailored 3D metallic foam architectures were decorated with manganese oxide via electrochemical routes to serve as positive electrodes for supercapacitors. These tailored foam electrodes exhibited higher specific capacitance, better capacitance retention at high current load, and enhanced cycling stability compared to commercial foam electrodes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Mengzhao Ding, Xuelong Miao, Lijie Cao, Chaomin Zhang, Yunxia Ping
Summary: By synthesizing the SiO2@a-TiO2@Ag composite, with a core-shell structure, where the a-TiO2 layer exhibits elastic behavior and Ag nanoparticles serve as good conductors, excellent lithium storage properties were demonstrated.
Article
Materials Science, Ceramics
Ganesh Koyyada, Burragoni Sravanthi Goud, Mohamed Ouladsmane, Jae Hong Kim, Nam Hai Nguyen Thi, Nam Nguyen Dang
Summary: The demand for high-energy storage supercapacitors with appropriate designs has led to the development of g-C3N4/WO3(H2O)0.33 (GCN/WO) nanostructures, which have been prepared using a simple wet impregnation process. These nanostructures show improved electrochemical storage performance compared to their individual components, with increased specific capacitance and cyclic stability. The positive synergistic effect between GCN and WO in the nanostructures contributes to their enhanced electrochemical capacitor characteristics.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Physical
Shahzadi Noreen, Muhammad Bilal Tahir, Abid Hussain, T. Nawaz, Jalil Ur Rehman, A. Dahshan, Meshal Alzaid, Hussein Alrobei
Summary: The article introduces the unique properties and wide applications of 2D monoelemental materials Borophene and Bismuthene, discussing the attention they have attracted in various scientific fields and potential research directions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Materials Science, Multidisciplinary
Jiawei Zhang, Yu Li, Zhen Chen, Qian Liu, Qingguo Chen, Minghua Chen
Summary: Electrochemical batteries and supercapacitors are considered as ideal rechargeable technologies for next-generation energy storage systems. The key to further commercialize electrochemical energy storage devices lies in designing and investigating electrode materials with high energy density and cycling stability. Amorphous materials have recently attracted much attention due to their defects and structural flexibility, providing a new avenue for electrochemical energy storage. In this perspective, we summarize recent research on amorphous materials for electrochemical energy storage, covering their advantages, synthesis strategies, application, modification, as well as the challenges and future prospects for development.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Energy & Fuels
Mayuresh Khot, Amirkianoosh Kiani
Summary: In this study, a NiO thin layer was synthesized directly on a Ni sheet using ultra-short, pulsed laser irradiation in air. The layer had 3D nanostructures with high porosity and enhanced surface area, making it suitable for fabricating pseudo capacitive electrodes. The effects of laser parameters, such as scan speed and frequency, were analyzed. The results showed that a lower scan speed resulted in a larger surface area and a broccoli-like structure. The oxide layer was formed through a series of events, including energy transfer, heating, melting, evaporation, ionization, plasma formation, rapid quenching, and oxide layer formation, which occurred in ambient conditions within an ultra-short duration. The obtained oxide layer consisted of self-standing 3D nanostructures, with the active material directly growing on the substrate without the need for a binder.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Matteo Crisci, Felix Boll, Leonardo Merola, Jonas Johannes Pflug, Zheming Liu, Jaime Gallego, Francesco Lamberti, Teresa Gatti
Summary: 2D materials are interesting platforms for electrochemical processes due to their high surface area and tunable electronic properties. Combining TMDs with conducting polymers can provide better performance, as demonstrated by the 2D WS2@PANI hybrid materials exhibiting good capacitive behavior in neutral pH.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Shibo Shang, Xianyou Wang, Feng Jiang
Summary: The usage of Li2O2 can greatly improve the electrochemical performances of NCA cathode material, whether in poly-crystal or single crystal forms. Results show that single crystals of LiNi0.88Co0.09Al0.03O2 prepared using Li2O2 exhibit excellent initial discharge capacity and cycle retention rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
S. Ezhil Arasi, R. Ranjithkumar, P. Devendran, M. Krishnakumar, A. Arivarasan
Summary: The study reported the supercapacitive behavior of chemically synthesized cobalt vanadate nanostructures. Crystallographic information and optical response were investigated through various analytical techniques. The prepared Co3V2O8 showed specific capacitance value of about 790 F/g at 1 A/g current density and 90.1% capacitive retention after 10000 cycles, indicating its potential as an electrode material for future energy storage devices.
JOURNAL OF ENERGY STORAGE
(2021)
Review
Chemistry, Multidisciplinary
Soheila Sanati, Reza Abazari, Josep Albero, Ali Morsali, Hermenegildo Garcia, Zibin Liang, Ruqiang Zou
Summary: This review focuses on the use of MOF-derived bimetallic materials in supercapacitors, highlighting their advantages including tunable electrochemical activity, high charge capacity, and improved electrical conductivity. The challenges and perspectives in this research area are also discussed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Sunny Nandi, Shyamal K. Das
Summary: The improved performance of a rechargeable Al-graphite cell in aqueous electrolyte was achieved by modifying the graphite electrode and treating it at high temperature to obtain high surface area nanosized graphite flakes. The enhanced discharge capacity is attributed to reduced charge transfer resistance at the electrode-electrolyte interface. The influence of 'water-in-salt' electrolyte on electrochemical performance was also investigated.
Article
Chemistry, Physical
Chia-En Hsieh, Ching Chang, Shivam Gupta, Chung-Hsuan Hsiao, Chi-Young Lee, Nyan-Hwa Tai
Summary: This study demonstrates a novel fabrication method for supercapacitor electrodes composed of CoMn2O4 nanosheets coated onto carbon nanotubes grown on a stainless-steel mesh. By controlling the deposition time of the nanosheets, favorable morphology and excellent capacitance can be achieved. The material, which does not require binders or additives, exhibits high specific capacitance and is of significant importance for practical energy storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Dongyao Zhang, Chuanchang Li, Niangzhi Lin, Baoshan Xie, Jian Chen
Summary: Composite phase change materials were synthesized from KH-550-decorated mica and poly-ethylene glycol by vacuum impregnation method, with the addition of expanded graphite to improve thermal conductivity and storage capacity. The Md/EG/PEG composite showed enhanced thermal stability and potential for energy conservation in buildings.
JOURNAL OF ENERGY STORAGE
(2021)
Review
Chemistry, Physical
Liangxu Lin, Naihua Miao, Gordon G. Wallace, Jun Chen, Dan A. Allwood
Summary: The electrochemical oxygen reduction reaction is crucial in energy conversion technologies, and the use of low-cost and durable carbon materials as efficient catalysts shows promise for future applications. Research efforts are focusing on understanding catalytic mechanisms and engineering techniques to improve the performance and selectivity of these carbon catalysts. Future improvements in carbon catalysts are expected to lead to more efficient and reliable energy conversion technologies.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
M. Vijatovic Petrovic, F. Cordero, E. Mercadelli, E. Brunengo, N. Ilic, C. Galassi, Z. Despotovic, J. Bobic, A. Dzunuzovic, P. Stagnaro, G. Canu, F. Craciun
Summary: The flexible lead-free piezoelectric composite films prepared by hot pressing showed promising performance in efficiently and safely powering small-scale electronic devices using mechanical energy. With increasing active phase content, the permittivity and elastic modulus increased, demonstrating excellent properties for energy storage and energy harvesting applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Shuixin Xia, Xun Zhang, Lingli Luo, Yuepeng Pang, Junhe Yang, Yizhong Huang, Shiyou Zheng
Summary: The advanced energy storage technology of using metallic lithium instead of graphite anode can significantly increase the energy density of batteries. By constructing a stable SEI layer combined with a 3D host, the stability of lithium metal can be improved, promoting high Coulombic efficiency and stable cycling performance. This metal-free design is cost-effective and minimizes energy sacrifice, showcasing the potential for practical usage in high-performance lithium metal batteries.
Article
Chemistry, Multidisciplinary
Zumin Guo, Yuepeng Pang, Shuixin Xia, Fen Xu, Junhe Yang, Lixian Sun, Shiyou Zheng
Summary: Rational structure design leads to the development of a novel CSE membrane with high Li-ion conductivity and excellent dendrite suppression capability, attributed to the uniform LLZO dispersion in PEO-LiTFSI and the vertical/horizontal anisotropic Li-ion conduction in the CSE.
Article
Materials Science, Multidisciplinary
Kepan Bao, Yuepeng Pang, Junhe Yang, Dalin Sun, Fang Fang, Shiyou Zheng
Summary: Rational composite design is crucial for developing high-performance composite polymer electrolytes for solid-state lithium metal batteries. The introduction of Li closo-borohydride into the polymer electrolyte has shown to greatly enhance Li+ conduction properties, while density functional theory calculations have revealed the mechanism behind this improvement. In addition, the novel composite polymer electrolyte exhibits excellent electrochemical, thermal, and mechanical stability, making it highly compatible with various electrode materials.
SCIENCE CHINA-MATERIALS
(2022)
Article
Materials Science, Composites
Yuepeng Pang, Yufang Wang, Junhe Yang, Shiyou Zheng
Summary: Introducing amorphous VB2 nanoparticles into MgH2 through ball milling significantly reduces working temperatures, while providing both active V and hydrogen storage-capable MgB2. This dual-functional additive enhances hydrogen storage performances by lowering activation energy and serving as nucleation sites.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Hao Sun, Zhiqi Li, Shuixin Xia, Yuepeng Pang, Junhe Yang, Shiyou Zheng
Summary: This paper proposes a synergistic strategy for lithium-sulfur batteries that can improve the initial capacity, cycling stability, and sulfur loading of the battery, while addressing the existing issues.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Applied
Jiafeng Ruan, Yahui Zhao, Sainan Luo, Jiaming Hu, Yuepeng Pang, Fang Fang, Shiyou Zheng
Summary: Potassium-ion hybrid capacitors (PIHCs) show great potential for future energy storage devices, with unique structural carbon-based materials designed through heteroatom-doping and morphology-tuning strategies to enhance their performance. A novel "Killing Two Birds with One Stone" strategy is proposed to prepare a tri-elements doped hollow carbon sphere (TED-HCS) for PIHCs, offering high capacity and excellent rate performance. The multi-functional TED-HCS demonstrates outstanding energy/power density and high-capacity retention even after 12,000 cycles, providing new insights into the preparation of carbon-based materials with multi-elements doping and specific morphology structures.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Binbin Yang, Shuixin Xia, Hao Sun, Xun Zhang, Yuepeng Pang, Junhe Yang, Shiyou Zheng
Summary: By utilizing layered-double-hydroxide ultrathin nanosheet (LUN)-decorated Celgard separators, this research successfully addresses issues such as lithium polysulfide shuttle and dendritic Li growth, significantly improving the cycle life and stability of lithium-sulfur batteries.
ACS APPLIED ENERGY MATERIALS
(2021)
Review
Engineering, Chemical
Siqing Li, Yuanyuan Sun, Yuepeng Pang, Shuixin Xia, Taiqiang Chen, Hao Sun, Shiyou Zheng, Tao Yuan
Summary: This review summarizes the recent progress of layered transition metal oxide cathode materials for sodium-ion batteries, discusses their advantages and challenges, and provides insights for the development of high-performance sodium-ion batteries.
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2022)
Review
Nanoscience & Nanotechnology
Y. Pang, Y. Liu, J. Yang, S. Zheng, C. Wang
Summary: Solid-state batteries (SSBs) are promising candidates for next-generation energy storage devices due to their high safety and energy density. Hydrides have attracted attention as both electrolytes and electrodes for SSBs. This review provides an overview of borohydride-based solid electrolytes (SEs) and binary hydride- and alanate-based anode materials, as well as perspectives on the development of hydride-based key components.
MATERIALS TODAY NANO
(2022)
Article
Materials Science, Multidisciplinary
Yuepeng Pang, Zhengfang Nie, Fen Xu, Lixian Sun, Junhe Yang, Dalin Sun, Fang Fang, Shiyou Zheng
Summary: In this work, an amorphous Mg borohydride ammoniate (Mg(BH4)2·2NH3) is developed as a solid Mg electrolyte, which shows high Mg-ion conductivity and electrochemical stability, enabling stable cycling of all-solid-state Mg batteries.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Yuepeng Pang, Depei Zhang, Hao Sun, Xin Li, Shuixin Xia, Tao Yuan, Taiqiang Chen, Junhe Yang, John Wang, Shiyou Zheng
Summary: All-solid-state Na-ion batteries are a promising candidate due to their low-cost and large-scale potential. In this study, a novel and universal strategy is proposed to enhance the electrochemical stabilities of hydride electrolytes by utilizing in situ reactions between hydrides and NaHF2. The introduction of F-enriched interphases improves the stability of the electrolyte/electrode interfaces, resulting in stable cycling performance and high Coulombic efficiency of the all-solid-state Na-ion batteries. This study also provides insights into the development of hydride electrolytes for other applications.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xin Ye, Zhi - qi Li, Hao Sun, Ming-xia Wu, Zhong -xun An, Yue - peng Pang, Jun - he Yang, Shi - you Zheng
Summary: This study reports a method to stabilize sulfur compounds and produce high-performance room temperature sodium-sulfur (RT Na-S) batteries by incorporating TiO2 nanoparticles into the multichannels of electrospun carbon fibers. The addition of TiO2 nanoparticles increases the affinity of cathode materials for polysulfides and promotes the conversion of polysulfides to lower order products, resulting in improved cycling performance and electrochemical rate.
NEW CARBON MATERIALS
(2022)
Article
Chemistry, Physical
Zhen Hou, Shuixin Xia, Chaoqun Niu, Yuepeng Pang, Hao Sun, Zhiqi Li, Yuxi Xu, Shiyou Zheng
Summary: Solid polymer electrolyte is a promising method to construct next-generation energy storage systems. In this study, a highly crystalline covalent organic framework (V-COF) was designed and synthesized to improve the low ionic conductivity and poor high-voltage tolerance of solid polymer electrolytes. The V-COF-based solid-state electrolyte membranes exhibited superior ionic conductivity, wide electrochemical window, and high Young's modulus, enabling stable cycling and high capacity retention under high temperature and current density.
Article
Nanoscience & Nanotechnology
Ying Xu, Jiafeng Ruan, Yuepeng Pang, Hao Sun, Chu Liang, Haiwen Li, Junhe Yang, Shiyou Zheng
Summary: A homologous strategy was proposed to construct suitable anode and cathode materials for high-performance PIHC, resulting in unique multichannel carbon fiber (MCCF)-based anode and cathode materials with outstanding electrochemical performance. The fabricated S-MCCF anode and aMCCF cathode showed high capacity, super rate capability, and long cycle stability, leading to PIHCs with high energy and power densities and superior cycling stability.
NANO-MICRO LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Yuxin Zheng, Shuixin Xia, Fei Dong, Hao Sun, Yuepeng Pang, Junhe Yang, Yizhong Huang, Shiyou Zheng
Summary: This work demonstrates the rational coating of a flexible and conformal CTF-LiI coating on the Li metal surface to stabilize metallic Li, which leads to a uniform, dense, and dendrite-free electrodeposition process and effectively suppresses side reactions between metallic Li and electrolyte. This advancement shows a significant progress towards large-scalable and long-cycling stable Li metal batteries.
ADVANCED FUNCTIONAL MATERIALS
(2021)
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)
