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Surface carboxyl groups enhance the capacities of carbonaceous oxygen electrodes for aprotic lithiumoxygen batteries: A direct observation on binder-free electrodes

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Chinese Chemical Letters 2019年第12期30卷 2328-2332页

作者： Ming Li Liang Xiao Duo Wang Haoyang Dong Bohua Deng Jinping Liu School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

In order to achieve the high capacities of carbonaceous oxygen diffusion electrodes for aprotic lithiumoxygen batteries(Li-O2 batteries),most efforts currently focus on the design of rational porous *** few works study the surface chemistry effect that might be a critical factor influencing the capacities of carbonaceous *** addition,the surface chemistry effect is very difficult to be studied in composite electrodes due to the influences of binders and ***,we propose chemically activated carbon cloth(CACC) as an ideal model to investigate the effect of surface functional groups on the discharge capacities of carbonaceous oxygen electrodes for Li-O2 *** intrinsic surface chemistry effect on the performance of carbonaceous cathode is directly observed for the first time without the influences of binders and *** indicate that the surface carboxyl groups introduced by the chemical treatment not only function as the appropriate nucleation sites for Li2 O2 but also induce the formation of toroid-like Li2 ***,the surface carboxyl modification enhances the discharge capacities from 0.48 mAh/cm^2 of pristine carbon cloth to 1.23 mAh/cm^2 of *** work presents an effective way to further optimize the carbonaceous oxygen electrodes via surface functional group engineering.

关键词： Surface functional group Chemically activated carbon cloth Carbonaceous oxygen electrode Specific discharge capacity Lithium-oxygen battery

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PTCDA/CuS cathode enabling stable sulfide-based all-solid-state batteries

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Journal of Materiomics 2025年

作者： Zhixing Wan Shuo Wang Yahao Mu Ruihua Zhou Hang Liu Tingwu Jin Di Wu Jianlong Xia Ce-Wen Nan Center of Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan 430070 China School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan 430070 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China

Organic cathode materials have garnered significant attention for their potential application in lithium-ion batteries due to their lightweight nature, tunable structures, high energy density, and environmental friendliness. However, the dissolution of organic cathodes in liquid electrolytes often leads to poor cycling stability, which limits their practical application. In this study, a composite cathode was prepared by ball milling the PTCDA/CuS (perylene-3,4,9,10-tetracarboxylic dianhydride, PTCDA) with a sulfide-based electrolyte and carbon nanotubes. By optimizing the component ratios, the assembled all-solid-state batteries (ASSBs) show a high discharge capacity of 210 mA⸱h/g after 200 cycles without any capacity degradation at a current density of 33.0 mA/g. Through comprehensive characterization techniques including X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), the coordination of Cu 2+ and the formation of sulfur-linked polymers during the charge-discharge processes are elucidated, and the reversibility of the electrochemical reactions has been confirmed. This work highlights the excellent compatibility between organic cathodes and sulfide-based electrolytes, providing a new way for the development of high-performance ASSBs with high energy density and extended lifespan.

关键词： PTCDA/CuS lithium argyrodite organic cathode all-solid-state battery

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Influence of Showerhead with Baffle on Physical Field of Hcvd Reactor

SSRN

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SSRN 2022年

作者： Li, Qizhong Zhang, Yixuan Ji, Baifeng Zhang, Song Tu, Rong Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan430070 China School of Civil Engineering and Architecture Wuhan University of Technology 122 Luoshi Road Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Xiangxing Road 6 Guangdong Zhongshan528400 China

The physical field in halide chemical vapour deposition film growth is strongly affected by the structure of the reaction chamber. Notably, a highly uniform film thickness can be achieved by optimising this chamber. Therefore, after modelling a reactor, computational fluid dynamics was used in this study to measure temperatures and verify the accuracy of simulations. Based on changes in the substrate surface concentration and temperature, the feasibility of optimising the size and position of the baffle and the inclination angle of the spray holes was studied. The results revealed that on increasing the diameter of the baffle gradually, the uniformity of the substrate surface initially increased and then decreased. The most critical influence of the baffle position is the amount of gas on the substrate surface. As the inclination angle of the spray holes increased, the concentration at the centre of the substrate surface decreased, whereas that at the edge of the substrate increased. Meanwhile, the temperature field remained uniform after optimization. This study demonstrates that the showerhead and baffle can improve the physical field and that it is feasible to optimise the structure by analysing the physical field. © 2022, The Authors. All rights reserved.

关键词： Structural optimization

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Relationship of Electrical Properties and Partical Size of Piezoelectric Ceramics Fabricated by Digital Light processing 3D Printing

Research Square

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Research Square 2021年

作者： Liu, Kai Hu, Jiaming Shi, Yusheng Zhou, Chenyang Sun, Yunfei Zhang, Song Tu, Rong Zhang, Qingqing Zhang, Yuzhen Yin, Changxia Huang, Shangyu Sun, Huajun State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Hubei Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Hubei Wuhan430070 China State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Hubei Wuhan430074 China Advanced Ceramics Institute of Zibo New & High-Tech Industrial Development Zone Shandong Zibo255000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

To improve electrical properties of BaTiO3 piezoelectric ceramics fabricated by 3D printing, effects of particle sizes was investigated on rheological and curing properties of ceramic slurries, electrical properties of BaTiO3 fabricated by Digital Light processing 3D printing method. It was found that the curing ability of ceramic slurries decreased first and then increased with the increase of particle size from 136 nm to 1486 nm, while the viscosity of the slurries kept decreasing. When the particle size in a range of submicron, the grain size of sintered ceramics decreased from 13.27 μm to 6.84 μm as particle size increasing. Immediately, the relative density, piezoelectric constant, relative permittivity and remanent polarization of sintered ceramics were measured and it turns out to reach 95.32%, 161.4 pC/N, 1512 and 7.59 uC/cm2 respectively while using the BaTiO3 powder with particle sizes of 993 nm. Finally, a cellular structural BaTiO3 ceramics was fabricated by using optimized powder and process parameters and packaged as a piezoelectric sensor, showing a good function of force-electricity conversion. These results demonstrated the feasibility of fabricating high-quality functional ceramics with designed geometry by Digital Light processing. © 2021, CC BY.

关键词： Particle size

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Corrosion resistance and antimicrobial properties of ZnO-Ce2O3 coatings by magnetron sputtering

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Journal of Vacuum Science and technology A: Vacuum, Surfaces and Films 2025年第4期43卷

作者： Tu, Rong Qin, Zixiong Wu, Wei Zheng, Long Xu, Qingfang Gao, Tenghua Zhang, Song Dai, Honglian Goto, Takashi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China Hubei Technology Innovation Center for Advanced Composites Wuhan University of Technology Wuhan430070 China

The ZnO-Ce2O3 composite coating developed in this study significantly enhances the medical applicability of 316L stainless steel by synergistically improving corrosion resistance and antibacterial performance. Through magnetron sputtering, the ZnO-Ce2O3 composite coating reduces the corrosion current density of 316L stainless steel by an order of magnitude (from 2.935 × 10−7 to 1.278 × 10−8 A/cm2), outperforming individual ZnO or CeO2 coatings. Biological experiments demonstrated that the composite coating achieved over 98% antibacterial efficiency against Staphylococcus aureus while exhibiting low cytotoxicity toward mesenchymal stem cells, thereby addressing critical limitations of traditional stainless steel in medical devices. Additionally, the increased water contact angle (from 80° to 114°) correlated with inhibited bacterial adhesion, suggesting a dual antibacterial mechanism. This multifunctional coating strategy offers a promising solution for improving implant safety and patient outcomes. © 2025 Author(s).

关键词： Corrosion resistant coatings

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Hierarchy:from nature to artificial

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National Science Review 2020年第11期7卷 1623-1623页

作者： Bao-Lian Su Dongyuan Zhao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Laboratory of Inorganic Materials Chemistry CMI University of Namur Department of Chemistry State Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsLaboratory of Advanced Materials and iChEM Fudan University

Hierarchy is present everywhere in our planet, from family, society, urban construction, ecological systems to living organisms,although usually we neglect it. In the biosystem, to achieve transfer, exchange and transformation of substances and energy with extremely high efficiency and minimized energy consumption,evolution by natural selection has endowed many classes of organisms with hierarchically porous networks.

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Effect of Graphene Surface Functional Groups on the Mechanical Property of PMMA Microcellular Composite Foams

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Journal of Wuhan University of technology(materials Science) 2019年第3期34卷 717-722页

作者： LI Meijuan SHEN Qiang School of Chemistry Chemical Engineering and Life SciencesWuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

The functional groups on graphene sheets surface affect their dispersion and interfacial adhesion in polymer matrix. We compared the mechanical property of polymethymethacrylate（PMMA） microcellular foams reinforced with graphene oxide（GO） and reduced graphene oxide（RGO） to investigate this influence of functional groups. RGO sheets were fabricated by solvent thermal reduction in DMF medium. UV-Vis, FT-IR and XPS analyses indicate the difference of oxygen-containing groups on GO and RGO sheets surface. The observation of SEM illustrates that the addition of a smaller number of GO or RGO sheets causes a fine cellular structure of PMMA foams with a higher cell density(about 1011 cells/cm3) and smaller cell sizes（about 1-2 μm） owing to their remarkable heterogeneous nucleation effect. Compared to GO reinforced foams, the RGO/PMMA foams own lower cell density and bigger cell size in their microstructure, and their compressive strength is lower even when the reinforcement contents are the same and the foam bulk density is higher. These results indicate that the oxygen-containing groups on GO sheets’ surface are beneficial to adhere CO2 to realize a larger nucleation rate, and their strong interaction with PMMA matrix improves the mechanical property of PMMA foams.

关键词： graphene surface functional groups PMMA microcellular composite foams mechanical property

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Structural evolution and crystallization kinetics of Fe-based amorphous alloys under ultrasonic vibrations treatment

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Journal of Alloys and Compounds 2025年 1030卷

作者： Qin, Zhi You, Shiyue Zhang, Tong Yin, Fei Zhou, Jing Shen, Jie Jin, Wei Chen, Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Silicate Materials for Architectures School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Hubei Longzhong Laboratory Xiangyang441000 China

Fe-based amorphous alloys are widely used in various fields such as filters, low-frequency mechanical antennas, and wastewater treatment due to their unique soft magnetic properties and band structure. Currently, several surface treatment methods, including such as high-temperature autoclave processing, high-energy particle irradiation, pulsed laser treatment, and dynamic mechanical relaxation are employed to optimize the structure and enhance the performance of Fe-based amorphous alloys. Ultrasonic vibration treatment (UVT) has gained attention for its concentrated and rapid energy application, often used as an assisted method for laser treatments. In this paper, UVT was applied directly to the amorphous alloys, with the total energy input controlled by varying the UVT time. The results of X-ray diffraction and pair distribution function from selected area electron diffraction of TEM indicate that UVT can finely tune and restore the structure of Fe-based amorphous alloys by facilitating the interconversion between bcc and fcc/rcp units according to the two-structure model. Additionally, the influence of UVT on the crystallization kinetics of the amorphous alloys was investigated by differential scanning calorimetry (DSC). The Mu-10s has the most bcc units and the highest activation energies among the samples. It was found that UVT primarily affects the crystal growth stage and does not influence the 'instantaneous nucleation - low-dimensional growth' crystallization process, which influences the soft magnetic and magnetostrictive properties of Fe-based amorphous alloys. The measured structural, thermal, and magnetic parameters of the Mu-240s show a tendency to recover toward those of the initial stage. The fine-tuning and recovery of the structure of Fe-based amorphous alloys through UVT can provide valuable control strategies for the practical applications. © 2025 Elsevier B.V.

关键词： Ultrasonic testing

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Definitions of Pseudocapacitive materials: A Brief Review

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Energy & Environmental materials 2019年第1期2卷 30-37页

作者： Yuqi Jiang Jinping Liu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanHubei 430070China School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhanHubei 430070China

Pseudocapacitive materials generally offer both high capacitance and high rate capability, which has stimulated great efforts in developing the materials system and related energy storage devices. In recent years, however, with the extensive use of nanomaterials in batteries, fast redox kinetics comparable to pseudocapacitive have been achieved in many kinds of battery materials due to the much shortened ion diffusion lengths and highly exposed surface/interface as a result of nanosize effect. Consequently, the terms"pseudocapacitive materials" and "battery materials" are becoming more and more confusing. In this review, different opinions on the definition of pseudocapacitive materials and the evolution of the definitions as well as the resulting confusion will be firstly reviewed. Then, to accurately distinguish pseudocapacitive and battery materials, method with the consideration of both the electrochemical signatures(CVs and GCD) and quantitative kinetics analysis as a supplement is proposed. Finally, we end this review by discussing the possible device configurations of asymmetric supercapacitors and hybrid supercapacitors. The present review will help understanding the differences between pseudocapacitive materials and battery materials, and thus avoiding the definition confusion.

关键词： definition electrochemical signatures pseudocapacitive material quantitative kinetics analysis

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Reactions between graphene oxide sheets cause irreversible agglomeration

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科学通报（英文版） 2022年第19期67卷 1943-1945页

作者： Ying Dong Jing Li Xiao-Yu Yang Department of Forensic Medicine Huazhong University of Science and TechnologyWuhan 430030China Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing&Shenzhen Research Institute&Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology(Qingdao) Wuhan University of TechnologyWuhan 430070China School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA

Graphene has received increased attention recently owing to its wide range of significant *** is comprised of planar sheets of carbon atoms arranged in six-membered ring net-works(Fig.1a).An atomically thin sheet of this substance can be regarded as molecular entity,in which nanometer-scale corruga-tions and defects create different physical and chemical *** about how these sheets interact with solvent molecules and how the defects govern these interactions is a crit-ical component of understanding and predicting the liquid-phase chemistry of *** angle measurements have been typically utilized to gain macroscopic information about interfacial interactions occurring between water and *** to its one carbon atom thickness,the top single-layer of graphene is wet-ting transparent to the underlying substrates[1,2].The surface hydrophobicity of graphene can be induced by adsorption of air-borne pollutants(e.g.,hydrocarbons)[3].In addition,graphene-based interfacial materials having either superhydrophobicity or superhydrophilicity have been developed.

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