Article
Metallurgy & Metallurgical Engineering
Fuyong Cao, Bo Xiao, Ziming Wang, Tao Ying, Dajiang Zheng, Andrej Atrens, Guang-Ling Song
Summary: This study investigated the corrosion behavior of different alloys in a salt solution and found that Mg 64 Zn 36 alloy has an amorphous microstructure, lower corrosion rate, and no hydrogen evolution during corrosion. This is a new approach to prevent hydrogen evolution during Mg alloy corrosion.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Electrochemistry
Tongyao Bao, Lifeng Hou, Junli Sun, Xiaoda Liu, Huayun Du, Huan Wei, Yinghui Wei
Summary: Adding indium element can reduce the negative difference effect of magnesium alloy, decreasing the exchange current density for hydrogen evolution reaction.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Junjun Jin, Wei Lu, Zhenghong Fu, Zhongyin Zhu, Wenjing Chen, Guoqing Gou
Summary: This study investigates the corrosion fatigue crack growth (CFCG) in the local zones of A7N01S-T5 aluminum alloy metal inert gas (MIG) welded joints from high-speed train underframes. The results indicate that the base metal (BM) region has the highest rate of CFCG compared to the heat-affected zone (HAZ) and the weld metal (WM) zone. The failure mode of the BM is hydrogen-assisted propagation, while the HAZ and WM exhibit anodic dissolution. The study provides insights into the specific CFCG mechanisms in each zone of aluminum alloy welded joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Gualter Silva Pereira, Thiago Roberto Felisardo Cavalcante, Matheus Castaldi Cid, Marcelo Falcao de Oliveira, Marcos Hideki Miyazaki, Julian Arnaldo Avila Diaz, Waldek Wladimir Bose Filho
Summary: This study focuses on the fatigue crack propagation of the WE43 magnesium alloy, and finds that the crack rates are higher in the sodium chloride environment compared to laboratory air, possibly due to hydrogen embrittlement and anodic dissolution.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Electrochemistry
A. Ortiz-Ozuna, F. A. Godinez, J. Genesca, R. Montoya
Summary: To better understand the anodic polarization of Mg, a gel electrolyte doped with phenolphthalein was used to avoid convective effects and reveal alkaline zones. This article provides new insights on Mg dissolution when galvanically coupled to AA7075. It has shown that OH- ions generated during Mg dissolution are locally neutralized in the electrolyte and accurately identified the location of Mg(OH)2 compound formation during anodic dissolution.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Chemical
Kaixuan Wang, Xin Qin, Peike Cao, Shuo Chen, Hongtao Yu, Xie Quan
Summary: An integrated electrocatalytic process combining electrochemical anodic oxidation (AO) with cathodic electro-Fenton (EF) was proposed to boost refractory pollutant removal over a broad pH range. The process showed high efficiency and stability in actual wastewater treatment, meeting the discharge standard for sewage treatment plants in China.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Li Lei, Zhongyu Cui, Hui Pan, Kun Pang, Xin Wang, Hongzhi Cui
Summary: The microstructure, corrosion behavior, and cytocompatibility of as-cast and extruded Mg-Zn-Mn-(0, 1.5)Sr alloys in Hank's solution were investigated. Extrusion resulted in grain refinement and preferred texture, while distinct features of Sr-free and Sr-containing alloys included an increase in dislocation density and fragmentation of Mg17Sr2, respectively. Extrusion significantly accelerated the corrosion rate of Sr-free alloy, while alloyed Sr eliminated this deterioration process. Sr alloying decreased the corrosion rate and enhanced the cytocompatibility of the extruded Mg-Zn-Mn alloy without affecting the corrosion penetration depth, demonstrating the superiority of Sr alloying for extruded magnesium alloys as implant materials.
Article
Chemistry, Physical
Jinlong Li, Weiqi Zhang, Qiang Ma, Qian Xu, Olivia Barron, Khadijeh Hooshyari, Huaneng Su
Summary: A facile and universal strategy of in-situ growing Pt nanowires on a dual microporous layer (MPL) as a novel catalyst layer (CL) for proton exchange membrane fuel cells (PEMFCs) is proposed in this study. The effect of dual MPL structure on PEMFCs performance is investigated, showing significantly improved power output and durability.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Multidisciplinary
Pedro Atz Dick, Robert G. Kelly
Summary: The influence of non-aqueous solvents on the corrosion behavior of passive alloys is still largely unknown. The corrosion of alloy C-22 was studied in organic aprotic solvents containing various water concentrations of HCl. It was found that C-22 is passive in nearly anhydrous solvents, but passivity breaks down when 0.1M HCl is present, leading to either uniform corrosion or pitting. Residual water can either stimulate or inhibit active dissolution depending on its concentration.
Article
Engineering, Chemical
Qing Ju, Hongying Tang, Hao Dong, Kang Geng, Huidong Qian, Xiaohua Ma, Nanwen Li
Summary: A novel triptycene-based polybenzimidazole (Trip-PBI) material was obtained for the first time and used as a PEM or binder in high-temperature proton exchange membrane fuel cells (HT-PEMFC). By using Trip-PBI as a binder, the issues of gas transfer restriction and excessive PA diffusion in the PEM to the catalysis layer have been successfully addressed. As a result, the MEA with Trip-PBI as the binder exhibits a maximum power density of 700 mW/cm2 at 160 degrees C, which is 1.84 times that of m-PBI and 1.36 times that of PTFE. Moreover, the H2/O2 cell using Trip-PBI binder also shows good stability for 100 h at 160 degrees C with a current density of 0.3 A/cm2.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Christos Kousis, Patrick Keil, Neil McMurray Hamilton, Geraint Williams
Summary: In-situ scanning Kelvin probe and time-lapse photography were used to investigate filiform corrosion (FFC) of organic coated magnesium alloys. The propagation rates of FFC were found to increase logarithmically with chloride ion concentration and were strongly influenced by relative humidity. Surface analysis after corrosion revealed chloride abundance near the filament leading edge and evidence of sequestration within corroded regions behind. The FFC mechanism involves chloride-induced anodic dissolution at the front coupling with water reduction on a cathodically-activated corroded surface behind.
Article
Materials Science, Multidisciplinary
Michiaki Yamasaki, Zhiminig Shi, Andrej Atrens, Akito Furukawa, Yoshihito Kawamura
Summary: A highly corrosion resistant Mg-Zn-Y-Al alloy with a multimodal microstructure has been developed, showing orientation dependent corrosion behavior. The addition of aluminum facilitates the formation of a protective surface film.
Review
Chemistry, Physical
Zhenyou Li, Joachim Haecker, Maximilian Fichtner, Zhirong Zhao-Karger
Summary: This review summarizes recent findings related to Mg cathode chemistry, focusing on strategies that promote Mg2+ diffusion and the critical role of cathode-electrolyte interfaces. The article also discusses conversion chemistries and coordination chemistries that bypass Mg2+ diffusion and revisits hybrid systems combining monovalent cathode chemistries with high-capacity Mg anodes. Overall, the aim is to provide fundamental insights into cathode chemistry for practical high-performance Mg batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rubi Resendiz-Ramirez, Aaron Rodriguez-Lopez, Jesus A. Diaz-Real, Humberto F. Delgado-Arenas, Azucena Osornio-Villa, Rosalba Hernandez-Leos, Vincent Vivier, Rene Antano-Lopez
Summary: This study investigates the electrochemical synthesis of magnetite nanoparticles through analysis of electrochemical impedance spectroscopy (EIS). Three models are proposed and their EIS spectra predicted, with a new model involving up to three adsorbed intermediate species providing the best fit to experimental data. However, the existing mechanisms do not fully explain all experimental results, highlighting the need for further refinement in understanding the reaction mechanism.
Article
Chemistry, Physical
Ruinan Li, Qingsong Liu, Rupeng Zhang, Yaqi Li, Yulin Ma, Hua Huo, Yunzhi Gao, Pengjian Zuo, Jiajun Wang, Geping Yin
Summary: This study presents a novel design of passivation-free magnesium alloy anode for high-energy-density magnesium/sulfur batteries. By utilizing an alloy with lithium that undergoes a substitution reaction with magnesium ions in the electrolyte, the passivation reaction on the anode is hindered, resulting in improved interfacial reaction kinetics and reduced impedance. The magnesium/sulfur battery with this passivation-free Mg-Li alloy anode achieves an enhanced discharge voltage platform and higher energy density.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Robert Hahn, Andreas Gabler, Axel Thoma, Fabian Glaw, K. -D. Lang
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2015)
Article
Chemistry, Physical
Andreas Gabler, Christian I. Mueller, Thomas Rauscher, Thomas Gimpel, Robert Hahn, Michael Koehring, Bernd Kieback, Lars Roentzsch, Wolfgang Schade
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Engineering, Electrical & Electronic
Robert Hahn, Marc Ferch, Neil Amponsah Kyeremateng, Katrin Hoeppner, Krystan Marquardt, Giuseppe Antonio Elia
Summary: A cost-effective and reliable technology has been developed to miniaturize batteries into glass chips and electronic packages. Lithium-ion micro-batteries were fabricated using a dispense-print process and compared to traditional stacked electrodes. The use of interdigitated electrodes allowed for easier fabrication and similar performance to conventional configurations.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Robert Hahn, Marc Ferch, Kevin Tribowski, Neil Amponsah Kyeremateng, Katrin Hoeppner, Krystan Marquardt, Klaus-Dieter Lang, Wolfgang Bock
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2019)
Article
Chemistry, Multidisciplinary
Giuseppe Antonio Elia, Giorgia Greco, Paul Hans Kamm, Francisco Garcia-Moreno, Simone Raoux, Robert Hahn
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Energy & Fuels
Giuseppe Antonio Elia, Carlos Islas Acevedo, Reyhaneh Kazemi, Sebastien Fantini, Rongying Lin, Robert Hahn
Summary: In this study, the use of a gel polymer electrolyte comprising polyacrylonitrile and 1-ethyl-3-methylimidazolium chloride:aluminum trichloride ionic liquid in aluminum batteries was investigated. The research demonstrated that the electrolyte has suitable conduction properties for battery applications, can sustain efficient aluminum stripping deposition process, and mitigates chloroaluminate corrosivity.
Article
Chemistry, Physical
Giorgia Greco, Giuseppe Antonio Elia, Daniel Hermida-Merino, Robert Hahn, Simone Raoux
Summary: The reaction mechanism of aluminum graphite dual ion cell during anion intercalation process is investigated using operando X-ray scattering. The research directly measures the repeated intercalation distance and microporosity of the cathode graphite, and observes the staging behavior, phase transitions, and reversibility of graphite intercalation compound formation. The study demonstrates complete reversibility of electrochemical intercalation process and nano- and micro-structural reorganization of natural graphite induced by intercalation. This work provides new thermodynamic insights into the intermediate phase transitions in graphite intercalation compound formation.
Article
Electrochemistry
N. Amponsah Kyeremateng, Giuseppe A. A. Elia, Robert Hahn, Peter R. R. Slater
Summary: Although lithium-ion batteries are widely used, there is no international organization governing their development, leading to a lack of consensus on nomenclature for certain aspects, such as interphases. This absence of proper nomenclature is a long-standing issue, causing confusion for emerging scientists and hindering progress in emerging technologies like solid-state batteries. Therefore, this article critically addresses the nomenclature problem of interphases in lithium-ion batteries.
BATTERIES & SUPERCAPS
(2023)
Article
Electrochemistry
Giuseppe Antonio Elia, Katrin Hoeppner, Robert Hahn
Summary: This study compared the electrochemical characteristics of aluminum graphite dual-ion cells (AGDICs) using different electrolytes, finding that EMIMCl:AlCl3 demonstrated superior Al-stripping deposition and rate capability, while urea:AlCl3 showed higher columbic efficiency due to better electrochemical window stability.
BATTERIES & SUPERCAPS
(2021)
Article
Electrochemistry
Neil Amponsah Kyeremateng, Dion Gukte, Marc Ferch, Jan Buk, Tomas Hrebicek, Robert Hahn
BATTERIES & SUPERCAPS
(2020)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)