Article
Chemistry, Physical
Dongmei Zhang, Chao Wang, Yinghui Yang, Rongzhang Guan, Dujiang Lu, Li Gao, Chenyi Sun, Xiufang Bian
Summary: CuO anode modified with intermetallic compounds, denoted as ZnSn/CuO, exhibits high reversible capacity and excellent cycling stability in lithium-ion batteries, thanks to the improved conductivity and buffered volume expansion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Katja Lahtinen, Eeva-Leena Rautama, Hua Jiang, Samuli Rasanen, Tanja Kallio
Summary: The study found that the structure and capacity of aged LiCoO2 can be restored through re-lithiation, providing a new method for the recycling of used batteries.
Article
Chemistry, Multidisciplinary
Nurbol Ibadulla, Ayaulym Belgibayeva, Arailym Nurpeissova, Zhumabay Bakenov, Gulnur Kalimuldina
Summary: A novel Ni3Sn2@CNF material was successfully prepared and applied as an anode for lithium-ion batteries. Compared to pure carbon nanofiber, Ni3Sn2@CNF showed higher discharge capacity and better cycling stability, attributed to its electrochemically active components and reduced charge-transfer resistance through alloy encapsulation.
Article
Materials Science, Multidisciplinary
Y. Cui, J. W. Xian, A. Zois, K. Marquardt, H. Yasuda, C. M. Gourlay
Summary: The factors affecting the nucleation and morphology of large Ag3Sn plates in solder joints are not well understood. This study investigates the faceted solidification of Ag3Sn and reveals transitions from single crystal plates to cyclic twinned plates and highly branched structures. Real-time X-ray imaging confirms that Ag3Sn cyclic twins originate from a common point during nucleation or the early stages of growth. Soldering to copper substrates catalyzes Ag3Sn nucleation through constitutional supercooling and geometrical catalysis.
Article
Nanoscience & Nanotechnology
Chen-Jui Huang, Ya-Ching Hsu, Kassie Nigus Shitaw, Yu-Jhen Siao, She-Huang Wu, Chia-Hsin Wang, Wei-Nien Su, Bing Joe Hwang
Summary: Researchers have extended the lifespan of anode-free lithium metal batteries (AFLMBs) by introducing lithium oxalate as an electrode additive in the cathode. AFLMBs with a composite cathode containing 20% lithium oxalate and LiNi0.3Co0.3Mn0.3O2 exhibited >80% and 40% capacity retention after 50 and 100 cycles, respectively, outperforming AFLMBs using a pure LiNi0.3Co0.3Mn0.3O2 cathode. Surprisingly, the Coulombic efficiency of AFLMBs improved with an increased amount of lithium oxalate in the composite cathode.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yu Xin, Haoyi Mou, Chang Miao, Shuqing Nie, Minyue Wen, Guowen He, Wei Xiao
Summary: The SnCu-SiO2 @ CNFs composite nanofibers were successfully fabricated, resulting in improved structural integrity and electrochemical performance of the composite electrodes. The encapsulation of Sn-Cu alloy particles in CNFs and the incorporation of SiO2 mitigated phase separation and increased Li+ diffusion coefficient. The facile strategy offers prospective guidance for alloy anodes in energy storage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Renato Goncalves, Poonam Sharma, Pura Ram, Stanislav Ferdov, M. Manuela Silva, Carlos M. Costa, Rahul Singhal, Rakesh K. Sharma, Senentxu Lanceros-Mendez
Summary: LiMn2O4 and LiMn1.5M0.5O4 (M: Ni, Cu, Co) doped particles were synthesized by sol-gel, resulting in improved cycling behavior and thermal stability. Doping elements reduced pore size and enhanced thermal stability of LiMn2O4. Different active materials for cathodes showed varied electrochemical performances, with Ni, Cu, and Co doped LiMn2O4 demonstrating improved performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yan-Rong Huang, Dinh-Phuc Tran, Po-Ning Hsu, Shih-Chi Yang, A. M. Gusak, K. N. Tu, Chih Chen
Summary: This study presents an approach to inhibit Cu-Sn intermetallic compounds (IMCs) in flip chip solder joints by thermal-gradient annealing. Reflowing two types of solder joints, Cu/SnAg/Cu and Cu/SnAg/Ni, demonstrated that the IMC growth rates were significantly influenced by the thermal gradient. The inclusion of a Ni film at the cold end effectively retarded the thermomigration of IMCs. A kinetic model was proposed to explain the competitive reactions of Cu-molten solder joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yang Chen, Wenjie Dai, Yingxia Liu, Chih Chen, K. N. Tu, Guang Chen
Summary: With the downward scaling of micro-bumps in three-dimensional integrated circuits, surface inter-diffusion becomes dominant, affecting the formation mechanism of intermetallic compounds and causing reliability issues.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Chong Dong, Jinye Yao, Min Shang, Haoran Ma, Jun Chen, Haitao Ma, Yunpeng Wang
Summary: In this study, the growth behavior of Cu6Sn5 grains during the isothermal stage in solder joints was investigated. A new phenomenon, the formation of Cu6Sn5 with cellular boundary, was found. The role of Ag3Sn in the formation of the cellular boundary was identified. The study provides important insights into the growth of Cu6Sn5 and the improvement of solder joint reliability.
Article
Chemistry, Physical
Ikcheon Na, Hwiho Kim, Sebastian Kunze, Chihyun Nam, Sugeun Jo, Hanbi Choi, Sumin Oh, Eugene Choi, Yong Bae Song, Yoon Seok Jung, Yun Seog Lee, Jongwoo Lim
Summary: Surface-treated thin silicon wafers can function as monolithic, additive-free, electrolyte-free, and void-free electrodes to achieve high areal capacity at room temperature. Grooved silicon wafer electrodes showed reversible (de)lithiation and stable interfacial resistance, enabling homogeneous alloying/dealloying processes during cycling.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Liangdong Lin, Kun Qin, Qinghua Zhang, Lin Gu, Liumin Suo, Yong-sheng Hu, Hong Li, Xuejie Huang, Liquan Chen
Summary: The lifespan of anode-free lithium metal batteries can be extended by introducing Li-rich Li-2[Ni0.8Co0.1Mn0.1]O-2 into the cathode, resulting in high energy density and capacity retention after 100 cycles under limited electrolyte addition conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Analytical
Zhiying Chen, Kongqiang Ye, Minglin Li, Shuai Zhao, Jing Luo, Bo Wu
Summary: Tungsten-based materials show promise as anode materials for lithium-ion batteries, with the transformation between intercalation and conversion reactions depending on the number of inserted lithium atoms. Excellent stability of battery capacity was found in shallow charge-discharge, but not in deep charge-discharge.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Yueying Su, Rui Zhu, Tianqing Zheng, Yanping Shen, Yanyi Xu, Liugang Chen, Yunhu Zhang, Changjiang Song, Hongxing Zheng, Qijie Zhai
Summary: The study found that electric currents have a significant impact on the formation of Sn/Cu intermetallic compounds, with DC promoting the formation of Cu6Sn5 and ECP triggering its detachment.
JOURNAL OF MATERIALS SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Huibo Wang, De Ning, Litong Wang, Heng Li, Qingyuan Li, Mingzheng Ge, Junyan Zou, Shi Chen, Huaiyu Shao, Yuekun Lai, Yanyan Zhang, Guichuan Xing, Wei Kong Pang, Yuxin Tang
Summary: This review highlights the recent advances in the real-time investigation of lithium-ion batteries using neutron techniques. Neutron scattering, with its unique advantages, provides valuable insights into the battery mechanisms. Various neutron-based techniques have been applied in different scales and battery components.
Article
Materials Science, Multidisciplinary
Dae Yang Oh, Kyu Tae Kim, Sung Hoo Jung, Dong Hyeon Kim, Seunggoo Jun, Sungeun Jeoung, Hoi Ri Moon, Yoon Seok Jung
Summary: A new tactic of hybridizing sulfide solid electrolytes with thermally stable and slurry-fabricable dry polymer electrolytes for the fabrication of sheet-type electrodes in all-solid-state Li batteries is reported in this study. Experimental results demonstrate that this approach significantly improves the electrochemical performance of electrodes and has broad applicability.
Editorial Material
Chemistry, Physical
Yoon Seok Jung, Jiangfeng Qian
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Physical
Tae Young Kwon, Kyu Tae Kim, Dae Yang Oh, Yong Bae Song, Seunggoo Jun, Yoon Seok Jung
Summary: A new scalable in situ protocol to reinforce binders for ASLBs operating under low or no external pressures is reported in this study. Vulcanization of BR helps suppress electrochemo-mechanical degradation of electrodes, enhancing their performance.
ENERGY STORAGE MATERIALS
(2022)
Review
Chemistry, Physical
Kyu Tae Kim, Tae Young Kwon, Yoon Seok Jung
Summary: This article discusses recent studies on scalable fabrication strategies for flexible solid-state lithium batteries. The key factors for wet-slurry and dry-film fabrication methods are reviewed, and the latest developments in slurry-processing solvents, polymeric binders, and fabrication protocols are summarized.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Physical
Juhyoun Park, Jun Pyo Son, Wonseok Ko, Jae-Seung Kim, Yeji Choi, Hyungsub Kim, Hiram Kwak, Dong-Hwa Seo, Jongsoon Kim, Yoon Seok Jung
Summary: The newly prepared NaAlCl4 exhibits high Na+ conductivity and shows potential to be a good candidate material for all-solid-state sodium-ion batteries. The research demonstrates its outstanding electrochemical performance at high temperatures, shedding light on the potential of cost-effective and safe energy storage systems.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Physical
Haechannara Lim, Seunggoo Jun, Yong Bae Song, Hongyeul Bae, Jin Hong Kim, Yoon Seok Jung
Summary: In this study, the interfacial evolution of thin Li metal anodes with protective coatings is investigated. The positive effects of the protective coatings on the evolution of the Li/solid electrolyte interface are confirmed, and a new indicator for predicting Li dendritic growth is proposed.
ENERGY STORAGE MATERIALS
(2022)
Article
Engineering, Environmental
Kyu Tae Kim, Tae Young Kwon, Yong Bae Song, Sang-Mo Kim, Soon Chul Byun, Hong-Seok Min, Sa Heum Kim, Yoon Seok Jung
Summary: This study improves the compatibility of sulfide solid electrolytes and polymeric binders using a synergistic cosolvent approach, leading to the successful fabrication of high-performance electrodes and full cells.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Soon-Young Na, Ki-Sun Kim, Yoon Seok Jung, Don-Kyu Kim, Jina Kim, Sung Jin Cho, In-Kyu Lee, Jongkyeong Chung, Jeong-Sun Kim, Hueng-Sik Choi
Summary: In this study, we found that GSK5182 stabilizes the ERR gamma protein by inhibiting its ubiquitination and recruiting a corepressor through the AF-2 domain. These findings suggest that GSK5182 regulates ERR gamma by a unique molecular mechanism, increasing the inactive form of ERR gamma via inhibition of ubiquitination.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Young-Kook Kim, Yoon Seok Jung, Juhyun Song
Summary: Hepatic encephalopathy (HE) is a chronic metabolic disease with neurological and psychiatric symptoms, and recent studies suggest a positive correlation with Alzheimer's disease (AD). Our study compares the gene expression in an HE mouse model and an AD mouse model, revealing a potential link between HE-associated genes and neuronal dysfunction in AD mice.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Jong Seok Kim, Seungwon Jung, Hiram Kwak, Yoonjae Han, Suhwan Kim, Jongwoo Lim, Yong Min Lee, Yoon Seok Jung
Summary: A novel halide-sulfide hybrid catholyte design is reported for Ni-rich layered oxide cathodes in all-solid-state Li batteries. The hybrid catholyte consists of Li3YCl6 coatings for protection and Li6PS5Cl as a Li+conductor, which significantly improves the performance of the Li[Ni0.88Co0.11Al0.01]O2 cathodes.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Ikcheon Na, Hwiho Kim, Sebastian Kunze, Chihyun Nam, Sugeun Jo, Hanbi Choi, Sumin Oh, Eugene Choi, Yong Bae Song, Yoon Seok Jung, Yun Seog Lee, Jongwoo Lim
Summary: Surface-treated thin silicon wafers can function as monolithic, additive-free, electrolyte-free, and void-free electrodes to achieve high areal capacity at room temperature. Grooved silicon wafer electrodes showed reversible (de)lithiation and stable interfacial resistance, enabling homogeneous alloying/dealloying processes during cycling.
ACS ENERGY LETTERS
(2023)
Review
Chemistry, Physical
Yong Bae Song, Ki Heon Baeck, Hiram Kwak, Haechannara Lim, Yoon Seok Jung
Summary: This review discusses the design strategies and significance of solid-state electrolyte (SSE) films in all-solid-state batteries (ASSBs) based on sulfide solid electrolytes (SSEs). The study examines the essential components of SSE films, including SSEs, binders, and scaffold or substrate materials, and addresses key characteristics related to ASSB assembly and operation. Various SSE films fabricated using different binders and scaffold or substrate materials are explored, and the importance of establishing test protocols for assessing SSE film performance metrics is highlighted.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Kyu Tae Kim, Jehoon Woo, Young-Soo Kim, Sihyeon Sung, Changhyun Park, Chanhee Lee, Young Joon Park, Hyun-Wook Lee, Kyusung Park, Yoon Seok Jung
Summary: This study demonstrates that ultrathin superhydrophobic protective layers can enhance the stability of air-sensitive electrolytes in all-solid-state batteries and facilitate the recovery of ion conductivity. These findings suggest that superhydrophobic coatings are a promising solution for practical all-solid-state technologies.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Noh-Uk Seo, Kyungmi Kim, Jeongmin Yeo, Seung Jae Kwak, YongJoo Kim, Hyemi Kim, Mi Song Kim, Jeongi Choi, Yoon Seok Jung, Junghyun Chae, Jinho Chang, Jung Hoon Yang
Summary: We demonstrate that covalently attaching a 'hydroxide-philic' functional group to a TEMPO moiety effectively prevents chemical degradation and improves stability in a TEMPO-based aqueous organic redox flow battery. The strong interaction between the oxidized form of TEMPO and OH- was identified as the main cause of molecular decomposition. By designing and synthesizing a TEMPO derivative with a hydroxide-philic functional group, the interaction between OH- and the TEMPO moiety was hindered, resulting in improved stability and cycling performance. The derived MIMAcO-TEMPO showed a significantly reduced capacity decay rate and achieved a record-breaking discharge capacity in a high-concentration aqueous organic redox flow battery.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Green & Sustainable Science & Technology
Mahander P. P. Singh, Se-Ho Kim, Xuyang Zhou, Hiram Kwak, Alisson Kwiatkowski da Silva, Stoichko Antonov, Leonardo Shoji Aota, Chanwon Jung, Yoon Seok Jung, Baptiste Gault
Summary: This study uses cryogenic atom probe tomography to investigate the surface chemistry changes of cathode materials for Li-ion batteries. The formation of Li2CO3 species on the surface of a LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode material when exposed to air is observed. These findings are crucial for improving cathode synthesis and cell assembly protocols, as well as understanding cathode degradation processes.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
