Article
Chemistry, Physical
Jinglian Zhu, Xu Zhang, Haiguang Gao, Yuting Shao, Yana Liu, Yunfeng Zhu, Jiguang Zhang, Liquan Li
Summary: Rechargeable magnesium batteries face challenges due to strong coulombic effects, but this study presents a high-performance system using hierarchical nano-micro hybrids to improve accessibility and reduce charge transfer resistance, achieving high discharge capacity, outstanding rate performance, and excellent cycling performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Multidisciplinary
Yingying Yang, Jian Chen, Qiqian Gao, Yu Feng, Fei Xing, Man Yao
Summary: In this study, the catalytic activity of Ti3C2 MXene in Li-O-2 batteries was investigated using theoretical calculations. It was found that Ti3C2 MXene with O-terminated groups showed better performance and potential in catalyzing ORR and OER. This research provides guidance for accelerating ORR and OER reactions in Li-O-2 batteries.
CURRENT APPLIED PHYSICS
(2022)
Article
Chemistry, Analytical
Deyu Mao, Shenglong Yi, Zirui He, Qiancheng Zhu
Summary: In this study, Fe3C/N-doped carbon tubes gas diffusion layer was synthesized using non-woven fabrics as the basis material, resulting in a carbon cloth that can be directly used as a cathode for lithium-oxygen batteries, achieving stable cycles and providing a new strategy for future flexible battery applications and non-woven fabric recycling.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Jiajun Wang, Jing Xu, Bingyu Li, Meixin Lin, Tao Wang, Yuchao Zhen, Zhenyu Huang, Wei Xing, Lianming Zhao
Summary: First-principles calculations were performed to investigate WN MXenes as potential cathode catalysts for Li-O-2 batteries. The results show that the oxygen functionalized surfaces of WN MXenes can lower the overpotentials of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) due to their ability to bind with Li and promote electron transfer. Reducing the atomic layers of WN MXenes can further lower the overpotentials.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jiachen Qiu, Yuran Lin, Shuting Zhang, Jie Ma, Yu Zhang, Mengwei Yuan, Genban Sun, Caiyun Nan
Summary: A series of hollow catalysts were synthesized based on the structure of cubic zeolitic imidazolate framework-67 (ZIF-67) through different chemical etching treatments. The TA-ZIF catalyst with a more stable hollow structure and more oxygen vacancies was found to significantly improve the performance of Li-O-2 batteries.
Article
Chemistry, Physical
Mengting Xu, Shengqi Ding, Xuebin Yu, Zi-Feng Ma, Xianxia Yuan
Summary: The yolk-shell-structured NiCo2S4 spheres were synthesized as cathode catalysts for Li-O2 batteries, and the optimal sulfidation time was found to be 18 hours. The battery with YS-NCS-18 as the catalyst exhibited the highest specific capacity, best rate capability, and most stable cycling performance, due to the largest gap between the yolk and shell and the highest catalytic activity of the (531) surface.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yanan Jiao, Jian Qin, Hirbod Maleki Kheimeh Sari, Dejun Li, Xifei Li, Xueliang Sun
Summary: Combining balanced CO2 emissions with energy storage technologies is an effective way to alleviate global warming, and the Li-CO2 electrochemical system, with its promising energy storage and CO2 capture strategy, is attracting attention. However, the system is still in early stages of development and faces challenges due to slow kinetics of the CO2 electrochemical reaction.
ENERGY STORAGE MATERIALS
(2021)
Article
Materials Science, Ceramics
Xiao Meixia, Li Miaomiao, Song Erhong, Song Haiyang, Li Zhao, Bi Haying
Summary: This study investigates the effects of surface functionalization on the properties of Ti3C2 MXenes as electrode materials for LIBs. The results show that surface chlorination improves the structural stability and mechanical strength of Ti3C2, while also increasing the diffusion barrier and storage capacity. Moreover, surface chlorination expands the interlayer spacing, enhancing the accessibility of Li-ions and the charge-discharge rate.
JOURNAL OF INORGANIC MATERIALS
(2022)
Article
Chemistry, Physical
Yixuan Wen, Shuaijun Ding, Chongchong Ma, Peng Jia, Wei Tu, Yunna Guo, Shuang Guo, Wei Zhou, Xiaoqian Zhang, Jianyu Huang, Liqiang Zhang, Tongde Shen, Yuqing Qia
Summary: A nanoscale Li-O-2 nanobattery was assembled in an aberration-corrected environmental transmission electron microscope (ETEM) to track the catalytic mechanism of silver (Ag) catalyst during the charge/discharge process. It was found that numerous Ag nanoparticles were observed on the surface of Ag nanowire, which acted as catalysts for subsequent reactions. By synthesizing Ag nanoparticles decorated on porous carbon, the cycling stability and maximum specific capacity of Li-O-2 battery were improved. This study suggests that nanoscale Ag may be a promising catalyst for Li-O-2 battery.
Article
Chemistry, Multidisciplinary
Yongxiang Jiang, Meng Tian, Haibo Wang, Chaohui Wei, Zhihui Sun, Mark H. Rummeli, Peter Strasser, Jingyu Sun, Ruizhi Yang
Summary: This study presents a universal synthesis approach to fabricate mildly oxidized MXenes as cathode catalysts for Lithium-oxygen batteries (LOBs), achieving high specific capacity and long lifespan. The mo-V2CTx shows excellent electrocatalytic performance and stability, operating continuously for 90 cycles under a high current density.
Article
Nanoscience & Nanotechnology
Mufeng Liu, Yuling Zhuo, Asia Sarycheva, Yury Gogotsi, Mark A. Bissett, Robert J. Young, Ian A. Kinloch
Summary: Research findings demonstrate that Ti3C2Tx MXene is an effective mechanical reinforcement material in polymer matrices, with mechanical properties less dependent on flake thickness compared to graphene. MXene's active surface chemistry enables possible functionalization for stronger interface with polymers, making it suitable for applications in strain engineering, mechanical enhancement, and materials such as membranes, coatings, and textiles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Chenkun Li, Yao Xiao, Xiaosong Zhang, Hongwei Cheng, Ya-Jun Cheng, Yonggao Xia
Summary: This study presents a practical method to address the irreversible capacity loss of lithium-ion batteries during initial cycling by utilizing a Li2CO3/carbon nanocomposite as a lithium replenishment material. The nanocomposite, synthesized through high-speed ball-milling, exhibits high specific capacity and capacity retention in the initial charging cycle. By incorporating the nanocomposite in full-cells, the capacity and cycling life of the batteries are significantly improved.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Chaohui Wei, Meng Tian, Zhaodi Fan, Lianghao Yu, Yingze Song, Xianzhong Yang, Zixiong Shi, Menglei Wang, Ruizhi Yang, Jingyu Sun
Summary: A multifunctional 3D printed framework comprising nitrogen-doped porous Ti3C2MXene is proposed to regulate both electrodes of Li-S batteries. The framework possesses high conductivity and ample nitrogen sites for synergizing lithiophilic-sulfiphilic feature.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Kechen Li, Pengju Hao, Qian Zhang, Jianbo Zhang, Sydorov Dmytro, Yang Zhou
Summary: Experimental studies have shown that multiple surface functional groups exist on MXene, but current theoretical calculations only consider one group. This study constructed a model of MXene with multiple groups and explored its electrochemical performance as a lithium-ion battery anode material.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Fanbo Meng, Jiayao Qin, Haolin Zhang, Xingyu Xiong, Renzong Hu
Summary: This article discusses the catalytic properties of low-cost 2D atomic thin SnS2 catalysts for Li-O2 batteries through systematic experiments and theoretical calculations. The generation of Sn4+/Sn2+ redox couple in the SnS2 catalyst is found to act as active catalytic sites for promoting the formation/decomposition of intermediate LiO2 and discharge product Li2O2. Moreover, it is calculated that the (001) plane of SnS2 cathode can reduce the adsorption energy barrier and catalytic reaction energy gaps in Li-O2 batteries.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Zemin Sun, Di Wang, Liu Lin, Yuhui Liu, Mengwei Yuan, Caiyun Nan, Huifeng Li, Genban Sun, Xiaojing Yang
Summary: Reasonably regulating electronic coupling can enhance the catalytic activity. Constructing van der Waals heterojunction based on 2D materials is a potential way to optimize material properties. Introducing inert h-boron nitride in non-metal reduced graphene oxide catalysts can significantly improve the performance of Li-CO2 batteries.
Article
Chemistry, Multidisciplinary
Xingzi Zheng, Mengwei Yuan, Donghua Guo, Caiying Wen, Xingyu Li, Xianqiang Huang, Huifeng Li, Genban Sun
Summary: A surface-functionalized nitrogen-doped two-dimensional N-TiO2/Ti3C2Tx heterojunction with high conductivity and optimized electrocatalytic active sites was fabricated. It exhibited high specific capacity and superior cyclability in Li-oxygen batteries, along with reduced overpotential. Through experiments and tests, its high stability and reduced side reaction were verified.
Article
Chemistry, Multidisciplinary
Xingzi Zheng, Mengwei Yuan, Xianqiang Huang, Huifeng Li, Genban Sun
Summary: This paper introduces a novel Li-O2 battery electrocatalyst, a surface-functionalized CoP/Ti3C2Tx composite. The composite exhibits optimized electronic structure and active electrons, which enhance the efficiency of electrochemical reactions. The accordion shaped Ti3C2Tx with large specific surface area and excellent electronic conductivity enables sufficient exposure of active sites and Li2O2 deposition. Transition metal phosphides provide more active catalytic sites and exhibit good electrocatalytic performance. As an electrocatalyst in Li-O2 battery, the CoP/Ti3C2Tx composite achieves high specific discharge capacity and low overpotential, outperforming CoP and Ti3C2Tx individually. The application of transition metal phosphides and MXene in Li-O2 battery not only demonstrates higher cycling stability of the prepared composite, but also points out the direction for improving their electrochemical performance.
CHINESE CHEMICAL LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Mengwei Yuan, Zemin Sun, Han Yang, Di Wang, Qiming Liu, Caiyun Nan, Huifeng Li, Genban Sun, Shaowei Chen
Summary: The insulating nature of Li2O2 and the limited activity of solid-solid/-liquid interfaces hinder the performance of lithium-air battery, but in-situ doping of Li2O2 with select metal ions can greatly enhance the battery performance.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Zemin Sun, Liu Lin, Mengwei Yuan, Huiying Yao, Yingjia Deng, Binbin Huang, Huifeng Li, Genban Sun, Jia Zhu
Summary: This study successfully optimized the electronic structure of sulfur sites and enhanced proton adsorption properties under various pH conditions by constructing a pH-universal adaptability Mo-MoS2 MSH structure.
Article
Chemistry, Physical
Jingshen Xu, Na Lu, Mengwei Yuan, Genban Sun
Summary: In this study, Fe2O3/CNFs composites were prepared by the in-situ transformation method, combining carbon nanofibers (CNFs) with hollow rice-grained alpha-Fe2O3 nanoparticles. The rational microstructure design reduced the filling ratio, optimized impedance matching, and improved electromagnetic wave absorption performance. The Fe2O3/CNFs composites achieved strong reflection loss (-38.1 dB) and broad effective absorption bandwidth (4.6 GHz) at a low filling ratio (20 wt.%), and analysis of electromagnetic parameters confirmed the crucial role of the microstructure in the performance improvement. With optimized impedance matching and a simple preparation method, Fe2O3/CNFs have broad application prospects in electromagnetic wave absorption.
Article
Chemistry, Physical
Liu Lin, Ruiyun Xin, Mengwei Yuan, Tongyue Wang, Jie Li, Yunming Xu, Xuhui Xu, Mingxuan Li, Yu Du, Jianing Wang, Shuyi Wang, Fubin Jiang, Wenxin Wu, Caicai Lu, Binbin Huang, Zemin Sun, Jian Liu, Jinlu He, Genban Sun
Summary: Based on experimental and theoretical studies, the spin-magnetic effect of iron group layered double hydroxides (LDHs) was found to enhance the oxygen evolution reaction (OER) process. The saturation magnetization of iron group LDHs positively correlates with their OER performance under different magnetic fields. Among the tested LDHs, NiCoFe-LDHs show the strongest OER activity and saturation magnetization.
Review
Electrochemistry
Mengwei Yuan, Xingzi Zheng, Jingshen Xu, Qiao Ni, Luoqi Luo, Zejun Cai, Zemin Sun, Liu Lin, Genban Sun
Summary: MXenes, as typical two-dimensional layered structure materials, have been widely used in energy conversion and storage due to their high conductivity, ion transport ability, and rich surface structures. Recently, MXenes and their composites have been widely employed in secondary batteries, especially sodium-ion batteries (SIBs), with obvious performance improvement. By utilizing the advantages of MXenes, the construction of surface-functionalized MXenes and MXene-based composites effectively improves the conductivity and mass-transport properties of composites, alleviates volume expansion, and enhances the capacity properties, rate performances, and cycle stability of SIBs.
Article
Chemistry, Physical
Yayin Li, Mengwei Yuan, Han Yang, Kefan Shi, Zemin Sun, Huifeng Li, Caiyun Nan, Genban Sun
Summary: Oxygen evolution reaction (OER) is the rate-limiting step in water-splitting. By regulating the electronic structure and spin state density of Ni-sites, Ni-MOF with transition metals showed high catalytic activities for OER. This work provides a new reference for understanding the catalytic mechanism and designing spin electrocatalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Jiachen Qiu, Yuran Lin, Shuting Zhang, Jie Ma, Yu Zhang, Mengwei Yuan, Genban Sun, Caiyun Nan
Summary: A series of hollow catalysts were synthesized based on the structure of cubic zeolitic imidazolate framework-67 (ZIF-67) through different chemical etching treatments. The TA-ZIF catalyst with a more stable hollow structure and more oxygen vacancies was found to significantly improve the performance of Li-O-2 batteries.
Article
Chemistry, Physical
Yu Zhang, Shuting Zhang, Mengwei Yuan, Yufeng Li, Rong Liu, Caiyun Nan, Chen Chen
Summary: Through regulating the synthesis process, ZnCo2O4 with a unique Co site was obtained by replacing Co2+ and Co3+ sites in Co3O4 with Zn and Al atoms. The Li-O-2 batteries based on ZnCo2O4 showed longer cycle life than that of CoAl2O4, suggesting that Co-Oh(3+) site is a relatively better geometric configuration than Co-Td(2+) site for Li-O-2 batteries.
Review
Chemistry, Physical
Xingzi Zheng, Mengwei Yuan, Yuelin Zhao, Zihan Li, Kefan Shi, Huifeng Li, Genban Sun
Summary: This paper summarizes the latest research progress in MXene-based materials in LOBs, highlighting the significance of high conductivity and surface functionalization strategies in the theoretical design and experimental modulation, which promote electrode reaction kinetics and cyclability of LOBs. It also outlines the prospects and challenges of MXene-based LOBs and proposes novel strategies to enhance battery performance, inspiring future progress in designing high-performance LOBs using MXene materials.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Jiachen Qiu, Yuran Lin, Shuting Zhang, Jie Ma, Yu Zhang, Mengwei Yuan, Genban Sun, Caiyun Nan
Summary: In this study, a series of hollow catalysts were synthesized based on the structure of cubic zeolitic imidazolate framework-67 (ZIF-67) through various chemical etching treatments. These hollow structures have larger surface areas and can expose more active sites, leading to improved performance of Li-O-2 batteries.
Article
Chemistry, Applied
Donghua Guo, Mengwei Yuan, Xingzi Zheng, Miaomiao Li, Caiyun Nan, Genban Sun, Xianqiang Huang, Huifeng Li
Summary: By introducing metal molybdenum and designing a porous tubular structure of CoMo1-xP/Mo sulfur host, the conductivity and cycling stability of lithium-sulfur batteries can be improved, and the shuttle effect can be effectively inhibited, providing a new approach for the further design of high-performance cathode materials for lithium-sulfur batteries.
JOURNAL OF ENERGY CHEMISTRY
(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)