Article
Chemistry, Physical
Wenjuan Yang, Haytham Eraky, Chunyang Zhang, Adam P. Hitchcock, Igor Zhitomirsky
Summary: This study investigates the activation and charge storage mechanisms of Mn3O4 electrodes in supercapacitors, motivated by their promising pseudocapacitive properties. Activation protocols lead to significant capacitance increase during cycling. Scanning transmission X-ray microscopy (STXM) is used to analyze Mn3O4 activation for the first time, providing chemical mapping of different oxidation states with high spatial resolution. Mn3O4-carbon nanotube composite electrodes with high active mass loadings are prepared using quercetin dispersant. The capacitance variations during electrode activation are linked to STXM observations, revealing oxidation of Mn3O4 to MnO2 on the particle surface and in the bulk. The pseudocapacitive charge storage mechanism involves in situ oxidation of Mn3O4 and redox reactions of Mn4+/Mn3+ species.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Energy & Fuels
Alfonso J. Carrillo, Patricia Pizarro, Juan M. Coronado
Summary: Incorporating Cr cations in the redox couple Mn2O3/Mn3O4 can stabilize its multi-cyclic activity at high temperatures, leading to increased efficiency of energy storage systems.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Sergio Tosoni
Summary: Mn3O4 Hausmannite thin films supported on (Cu, Ag, Au) coinage metals were investigated using DFT calculations. The interface between the films and metal support exhibited different lattice and ionic match, leading to different interactions. The films on Cu (111) and Au (111) weakly adhered due to unfavorable structural match, while strong adhesion was observed on Ag(100) with commensurate lattice and epitaxial growth. A negative charge flow from the support to the film was reported, resulting in the reduction of the film and an increase in magnetic moments of metal ions in the octahedral sublattice. The ferrimagnetic ordering varied in supported films exposing different crystal faces.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Qicheng Qiao, Praveen Kumar, Ajay Singh, Shang-Lien Lo
Summary: This study synthesized low-toxicity and eco-friendly spherically shaped manganese oxides (alpha-MnO2, Mn2O3, and Mn3O4) using the chemical precipitation method. The variable oxidation states and diverse structures of manganese-based materials have a strong impact on electron transfer reactions. The as-prepared manganese oxides (MnOx) exhibited excellent catalytic activity for the degradation of rhodamine B (RhB) organic pollutant in the presence of peroxymonosulfate (PMS) under acidic conditions. The different oxidation states of MnOx promote oxidative-reductive reactions and the higher surface area provides ample absorption sites for pollutant interactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Zhongbing Wang, Jingyuan Fang, Yonghao Hao, Chunnian Chen, Dawei Zhang
Summary: In this study, Mn3O4 supercapacitor electrode material with specific morphology was synthesized using a two-step hydrothermal method. The combination of nanoparticles and nanorods enhanced the electrochemical performance, demonstrating good cyclic stability and energy storage capability.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
Yuling He, Yi Pu, Bin Zhu, Haijiang Zhu, Chao Wang, Wu Tang, Hui Tang
Summary: In this study, oxygen-defect Mn3O4 nanosheets were synthesized by controlling the concentration of oxygen vacancies, resulting in high specific capacity and long-cycle stability in aqueous zinc-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Po-An Chen, Shou-Heng Liu, H. Paul Wang
Summary: Capacitive deionization (CDI), a method with low energy consumption and environmental friendliness, has been widely used in saltwater desalination. This work demonstrates the feasibility of high-efficiency CDI of saltwater for water recycling and reuse using the low-cost and easily fabricated pseudocapacitive Mn3O4@C/AC electrodes.
Article
Energy & Fuels
Yan Huang, Peiwang Zhu, Changdong Gu, Haoran Xu, Jinsong Zhou, Gang Xiao
Summary: This study investigates the utilization of Si to improve the reaction characteristics of pure Mn2O3 and synthesizes (Mn1_xSix)2O3 materials. The results show that the best performance is achieved at x = 3% and 5%, with reduction conversion rates of 96.18% and 94.71% respectively. Moreover, the doped (Mn0.95Si0.05)2O3 sample exhibits reduction conversion rates of 90.92% and 63.64% after cycling, indicating the promotion of the oxidation reaction by Si. This research provides guidance for large-scale, cheap, and eco-friendly energy storage applications.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Shengsheng Liu, Linhan Liu, Zhiying Cheng, Jing Zhu, Rong Yu
Summary: The atomic structures of the (101) and (001) surfaces of Mn3O4 have been determined, showing that the (101) surface undergoes subsurface reconstruction while the (001) surface has Mn(III) ions in the outermost layer. These findings provide a microscopic understanding of the higher catalytic activity of the (001) surface compared to the (101) surface and could lead to the development of novel catalysts based on Mn3O4.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Engineering, Electrical & Electronic
P. Immanuel, G. Senguttuvan, J. H. Chang, K. Mohanraj, N. Senthil Kumar
Summary: Pure and Cr-doped Mn3O4 thin films were successfully prepared using the SILAR method. The films' microstructural, morphological, and electrochemical behaviors were analyzed by various techniques. The 3 wt% Cr-doped Mn3O4 electrode exhibited a specific capacitance of 181 F g(-1) at a current density of 1 A g(-1) in 1 M Na2SO4 aqueous solution.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Shiyu Wang, Rui Zhao, Shuyun Yao, Xiaoxuan Wang, Jinrui Wang, Xueying Gao, Zishan Hou, Xia Liu, Zhenzhen Fu, Dewei Wang, Jiangzhou Xie, Zhiyu Yang, Yi-Ming Yan
Summary: This study demonstrates the importance of modulating the thickness and intensity of built-in electric field (BIEF) to enhance charge transfer and improve the performance of electrochemical energy storage.
Article
Multidisciplinary Sciences
Zhengran Ji, Mike Hu, Huolin L. Xin
Summary: Accurate decomposition of the mixed Mn oxidation states is highly important for characterizing the electronic structures, charge transfer and redox centers for electronic, and electrocatalytic and energy storage materials that contain Mn. In this study, a deep learning approach was adopted to develop a calibration-free and reference-free method for decomposing the oxidation state of Mn L2,3 edges for both EELS and XAS. The convolutional neural network achieved 85% accuracy on the validation dataset.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Yu Xie, Jiandian Wang, Zihao Zhou, Ying Wu, Gao Cheng, Yongfeng Li, Changyong Sun, Ming Sun, Lin Yu
Summary: The study utilized morphology engineering and metal doping to prepare Mn3O4 with excellent catalytic performance, with the Ag-doped Mn3O4@Ag composite showing the best catalytic activity for O-3 decomposition. The results demonstrate that the Ag-doped Mn3O4@Ag exhibits a removal efficiency of up to 88.5% for O-3 within 24 hours, highlighting promising applications in air purification.
DALTON TRANSACTIONS
(2022)
Article
Food Science & Technology
Ke Zhang, Hui Zeng, Jingyu Feng, Zhengkun Liu, Zhenyu Chu, Wanqin Jin
Summary: Allura red (AR) is commonly used as a food and soft drink additive, but due to the special harm of the azo structure to the human body, dosage control is necessary. To address the issues of time-consuming, expensive, and complicated detection methods, a core-shell nanocube sensor has been developed for ultrawide detection range and selective recognition of AR. This sensor exhibits excellent selectivity with an ultra-wide linear range and remarkable anti-interference and reusability over 30 days.
FOOD AND CHEMICAL TOXICOLOGY
(2022)
Article
Electrochemistry
Wen Yin Ko, Andre Lammiduk Lubis, Ho Ya Wang, Tung Ching Wu, Shin Ting Lin, Kuan Jiuh Lin
Summary: A binder-free manganese oxide material was developed as a cathode material for aqueous zinc-ion batteries. This material exhibits good electrochemical performances, high capacity, good rate performance, and cycling stability. Additionally, the green synthesis of this material reduces costs, minimizes the use of toxic solvents, saves energy, and enables easy recycling.
Article
Chemistry, Applied
Pierre Gibot, Virginie Goetz
JOURNAL OF ENERGETIC MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Lydia Laffont, Alessandro Pugliara, Teresa Hungria, Jacques Lacaze
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2020)
Article
Materials Science, Ceramics
Pierre Gibot, Loic Vidal, Lydia Laffont, Julien Mory
CERAMICS INTERNATIONAL
(2020)
Article
Chemistry, Inorganic & Nuclear
P. Gibot, F. Quesnay, C. Nicollet, L. Laffont, F. Schnell, J. Mory, D. Spitzer
SOLID STATE SCIENCES
(2020)
Article
Materials Science, Multidisciplinary
Julie Flambard, Florence Carrette, Carole Monchy-Leroy, Eric Andrieu, Lydia Laffont
Summary: In order to reduce the radioactivity of PWRs, it is necessary to understand the release mechanisms, with research showing the critical temperature range during restart as the key phase for the release phenomenon. Tests and characterizations on SG tube materials provided insights into oxidation and release mechanisms during a PWR restart after SG replacement.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Chemistry, Physical
Adrien Barroux, Thomas Duguet, Nadege Ducommun, Eric Nivet, Julien Delgado, Lydia Laffont, Christine Blanc
Summary: The study found that the passive film formed on 17-4PH martensitic stainless steel manufactured by powder bed laser beam melting was structurally similar to that of conventionally manufactured 17-4PH, but significant differences were observed in thickness and chromium distribution.
SURFACES AND INTERFACES
(2021)
Article
Polymer Science
Pierre Gibot, Virginie Goetz
Summary: This study investigated the use of doped-polypyrrole conducting polymer in Al/SnO2 nanothermite to reduce its electrostatic discharge sensitivity, showing a gradual desensitization of ESD with increasing polypyrrole content. The reactive properties of polypyrrole-enriched nanothermite were verified, indicating an acceptable reactive behavior. This is the first report of successful addition of doped-polypyrrole conducting polymer in energetic nanocomposites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Baptiste Martin, Eric Dantras, Antoine Lonjon, Lydia Laffont, Colette Lacabanne
Summary: Polymer-based magnetoelectric composites with high-performance magnetoelectric effect were prepared by decorating nickel-coated silver nanowires onto a P(VDF-TrFE) matrix, showing significant coupling coefficient. Superior magnetic properties, enhanced coercive field, and strong magnetic anisotropy were observed.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
N. Guennouni, A. Barroux, C. Grosjean, D. Maisonnette, E. Nivet, E. Andrieu, D. Poquillon, L. Laffont, C. Blanc
Summary: The study compared the microstructures of 17-4PH martensitic stainless steels produced through conventional manufacturing and additive manufacturing with laser beam melting. It was found that there were significant differences in microstructure between the two methods, with the additive manufacturing sample containing a higher amount of reversed austenite.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Composites
Pierre Gibot, Estelle Puel
Summary: The study focused on the use of indium (III) oxide nanoparticles as oxidizer in the preparation of nanothermites and evaluated their performance characteristics and combustion velocity, as well as spark sensitivity. Experimental results showed that the Al/In2O3 nanothermite was insensitive to impact and friction stimuli, but extremely sensitive to spark.
JOURNAL OF COMPOSITES SCIENCE
(2021)
Article
Engineering, Environmental
Virginie Goetz, Pierre Gibot, Denis Spitzer
Summary: The study focused on incorporating a conductive polymer polyaniline (PAni) into Al/SnO2 energetic nanocomposites through two different methods to enhance performance and reduce sensitivity. Results showed that intimate integration of the polymer with the oxide can effectively decrease the sensitivity of the energetic composition, making it safer while improving reaction speed and combustion properties.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
A. Barroux, J. Delgado, M. E. Orazem, B. Tribollet, L. Laffont, C. Blanc
Summary: The passive films formed on laser-beam-melted and conventional 17-4PH martensitic stainless steels were studied using electrochemical impedance measurements. Differences in the passive films were observed, with the latter exhibiting better pitting corrosion resistance.
Article
Materials Science, Ceramics
Pierre Gibot
Summary: The detonation process based on TNT as an energetic reagent was successfully implemented for synthesizing a series of metal oxide ceramics, providing better physicochemical and mechanical properties and safer handling and transport conditions.
CERAMICS-SWITZERLAND
(2021)
Article
Materials Science, Multidisciplinary
S. Vernier, E. Andrieu, L. Laffont
Summary: The study found that after high temperature flash oxidation tests on Inconel 718 samples containing boron, the oxide film exhibited unevenly distributed spots, indicating a specific influence of boron during oxidation, especially near grain boundaries. The non-equilibrium segregation of boron near grain boundaries was found to be the cause of the uneven distribution of boron in the oxide film.
Article
Materials Science, Ceramics
Pierrey Gibot
CERAMICS-SWITZERLAND
(2020)
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)
