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Binder-free electrodes for advanced potassium-ion batteries:A review

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Chinese Chemical Letters 2021年第4期32卷 1299-1308页

作者： Wencong Liu Wenyi Liu Yuqi Jiang Qiuyue Gui Deliang Ba Yuanyuan Li Jinping Liu School of Chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal University.Harbin 150025China

Potassium-ion batteries(PIBs)have attracted enormous attention due to the abundance of potassium resources,low cost,fast ionic conductivity of electrolyte and relatively high operating *** great effo rts and progress,researches on PIBs are still at the initial stage,especially in the emerging field of flexible and wearable *** inevitable challenges for PIBs include low reversible capacity,unsatisfactory cycling stability and insufficient energy density,the solution to which mostly relies on designing adva nced ***-free electrodes have emerged as promising electrode architecture for *** electrodes avoid the use of insulating binders,which can be designed with various synergistic functional materials to address the aforementioned PIB issues and be endowed with flexibility/*** this review,we mainly summarize the recent progress on binde r-free electrodes for PIBs,with the focus on the methodologies,detailed strategies and functional materials for electrode *** strategy for binder-free electrodes is to assemble free-standing architecture with the help of carbon nanotubes(CNTs),graphitic fibers,and other carbon or mechanically robust materials,either alone or in *** other effective strategy is current collector substrate-assisted direct growth,including the use of carbon cloth,*** and other conductive ***,challenges and research opportunities are put forward at the end as the guidance for future development of binder-free PIB devices.

关键词： Binder-free Free-standing electrode Substrate-assisted directly grown electrode Potassium-ion battery Flexible device

Electrolyte Concentration Regulation Boosting Zinc Storage Stability of High-Capacity K0.486V2O5 Cathode for Bendable Quasi-Solid-state Zinc Ion Batteries

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Nano-Micro Letters 2021年第2期13卷 232-245页

作者： Linpo Li Shuailei Liu Wencong Liu Deliang Ba Wenyi Liu Qiuyue Gui Yao Chen Zuoqi Hu Yuanyuan Li Jinping Liu School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Chemistry Chemical Engineering and Life Scienceand State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070People’s Republic of China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025People’s Republic of China

Vanadium-based cathodes have attracted great interest in aqueous zinc ion batteries(AZIBs)due to their large capacities,good rate performance and facile synthesis in large ***,their practical application is greatly hampered by vanadium dissolution issue in conventional dilute ***,taking a new potassium vanadate K0.486V2O5(KVO)cathode with large interlayer spacing(~0.95 nm)and high capacity as an example,we propose that the cycle life of vanadates can be greatly upgraded in AZIBs by regulating the concentration of ZnCl2 electrolyte,but with no need to approach“water-in-salt”*** the optimized moderate concentration of 15 m ZnCl2 electrolyte,the KVO exhibits the best cycling stability with ~95.02% capacity retention after 1400 *** further design a novel sodium carboxymethyl cellulose(CMC)-moderate concentration ZnCl2 gel electrolyte with high ionic conductivity of 10.08 mS cm^-1 for the first time and assemble a quasi-solid-state *** device is bendable with remarkable energy density(268.2 Wh kg^−1),excellent stability(97.35% after 2800 cycles),low self-discharge rate,and good environmental(temperature,pressure)suitability,and is capable of powering small *** device also exhibits good electrochemical performance with high KVO mass loading(5 and 10 mg cm^-2).Our work sheds light on the feasibility of using moderately concentrated electrolyte to address the stability issue of aqueous soluble electrode materials.

关键词： Electrolyte concentration regulation Quasi-solid-state Zn ion battery K0.486V2O5 Large interlayer spacing Cycling stability

Advances in designing heterojunction photocatalytic materials

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Chinese Journal of Catalysis 2021年第5期42卷 710-730页

作者： Zongpeng Wang Zhiping Lin Shijie Shen Wenwu Zhong Shaowen Cao School of Advanced Study Taizhou UniversityTaizhou 318000ZhejiangChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina School of Pharmaceutical and Material Engineering Taizhou UniversityTaizhou 318000ZhejiangChina

Under the background of increasing energy crisis and global warming,semiconductor-based photocatalysis has received tremendous attention due to its potential application in green energy production,CO_(2) reduction and pollutant *** photocatalytic activity of semiconductors,however,remains low due to issues like fast recombination of photo-generated electron-hole pairs,limited electron mobility,restricted optical absorption or insufficient active *** appropriate heterojunctions is proved to be a promising method to address most of these issues and thus to improve the photocatalytic *** this review,the working mechanism of various heterojunctions is presented *** most recent advances of strategies in designing and preparing efficient heterojunction photocatalysts are further summarized and some perspectives on the future directions in this field are provided.

关键词： Photocatalyst Heterojunction Renewable energy Charge transfer Redox ability

Surface Roughening of Sio2 Filler to Enhance the High-Frequency Dielectric and Thermal Properties of Sio2/Ptfe Composites

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SSRN 2022年

作者： Li, Xin Zhou, Jing Shen, Jie He, Wenhao Yu, Yuanying Li, Qiangzhi 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

Low dielectric constant (Εr), low dielectric loss (tan δ), and low coefficient of thermal expansion (CTE) are necessary for polytetrafluoroethylene (PTFE)-based composites in high-frequency applications. In this paper, we construct the rough structure on the SiO2 filler surface to enhance the performance of SiO2/PTFE composites through a physical interaction way without coupling agents. The microstructure, interfacial combination, dielectric, and thermal properties of SiO2/PTFE composites were systematically investigated using the rough surface SiO2 (rSiO2). The results show that rSiO2 has a superior interfacial combination with PTFE than the smooth surface SiO2 (sSiO2), and the rSiO2 is more uniformly dispersed in the PTFE matrix, these result in a decrease in tan δ and CTE of the rSiO2/PTFE composites from 2.07–4.89 × 10-3, 80 ppm/°C for sSiO2/PTFE to 1.41–3.38 × 10-3, 67 ppm/°C (10–38 GHz). Meanwhile, the rSiO2/PTFE composites are kept in the low Εr (about 2.40, at 38 GHz). The rSiO2/PTFE composites possess excellent dielectric and thermal properties, making it promising for higher frequency applications. © 2022, The Authors. All rights reserved.

关键词： Silica

Surface Microtopography Construction and Osteogenic Properties Evaluation Of Bulk Polylactic Acid Implants

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SSRN 2023年

作者： Lin, Si Yuan, Xiaoting Du, Xinrui An, Ran Han, Yingchao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

In this study, polylactic acid (PLA) microspheres were used as the raw material to construct bulk implants with surface microtopography through hot pressing and heat treatment, and the microtopographical structures were regulated through the sizes of the PLA microspheres. The surface microtopographies of PLA implants were successfully constructed using micron-sized bulges, which showed a wave-like structure. The ridge width of bulges ranged from 1.64 ± 0.16 µm to 82.52 ± 14.38 µm and the valley depth ranged from 0.49 ± 0.07 µm to 37.35 ± 6.78 µm according to the sizes of microspheres. The nanoindentation tests showed that the modulus and hardness of PLA implants were gradually increased with the decrease in microsphere sizes. The surface microtopography resulted in a slight increase in the hydrophobicity of the PLA implants, but no significant differences were observed. Cells cultured on the implant surface with microtopography exhibited varying proliferation and morphological responses, and significantly increased osteogenic activity was observed relative to a PLA flat film. This study demonstrated that the surface microtopography derived from PLA microspheres could regulate cellular response and activate osteogenic properties of PLA implants. © 2023, The Authors. All rights reserved.

关键词： Microspheres

Development of Phase-Field Modeling in materials Science in China:A Review

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Acta Metallurgica Sinica(English Letters) 2023年第11期36卷 1749-1775页

作者： Yuhong Zhao Hui Xing Lijun Zhang Houbing Huang Dongke Sun Xianglei Dong Yongxing Shen Jincheng Wang Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Shaanxi Basic Discipline(Liquid Physics)Research CenterNorthwestern Polytechnical UniversityXi’an710129China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing211189China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an710072China School of Materials Science and Engineering Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-Performance Al/Mg Alloy MaterialsNorth University of ChinaTaiyuan030051China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang110004China

Phase-field method,as a powerful and popular approach to predict the mesoscale microstructure evolution in various materials science,provides a bridge from atomic-scale methods to the macroscale and has been widely used at an ever-increasing *** paper aims to briefly review the origin,basic idea,and development of phase-field models in a historical *** focus is placed on the classical and state-of-the-art applications in China,including liquid–solid,solid–solid,gas–solid,ferroelectrics/ferromagnetics phase transformation,and crack *** introducing the academic activities in the phase-field community in China,some suggestions for the future development directions of phase-field method are finally mentioned.

关键词： Phase-field method Microstructure Phase transformation Various materials design

Delayed Recrystallization Behavior and Deformation Mechanism of In738lc Alloy Prepared by Laser Powder Bed Fusion

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SSRN 2024年

作者： Hu, Yong Jia, Huibin Zhang, Xu Yang, Xiaokang Dong, Zhang School of Material Science and Engineering Lanzhou University of Technology Gansu Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Gansu Lanzhou730050 China State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization Gansu Jinchang737100 China

The design and development of heat treatment regimes adapted to the L-PBFed alloy for specific service conditions have become a hot topic of research in the field of AM. This paper systematically studies the microstructure changes of the L-PBFed IN738LC alloy, solution treatment at 1250 °C for various durations (1 h, 3 h, 5 h), then aging at 850 °C for 24 h, using XRD, EBSD, SEM, STEM and EDS. The analysis focuses on the delayed recrystallization behavior of the alloy and discusses the selective precipitation rule of the M23C6 carbide on different types of grain boundaries during recrystallization. Additionally, the tensile deformation mechanism of the alloy before and after heat treatment is clarified. The results show that due to the pinning of carbide particles and the segregation of solute atoms, the migration and transformation of grain boundaries under the condition of 1250 °C/1 h are hindered during the initial stage of solid solution treatment, which accounts for the delayed recrystallization behavior, and the microstructure is mainly experiencing recovery. At 1250 °C/5 h, M23C6 carbides selectively precipitate at twin boundaries, accompanied by recrystallization. The samples treated at 1250 °C/1 h exhibit the highest yield strength (σYS=1305±21 MPa) and tensile strength (σUTS=1462±11 MPa) owing to the precipitation of γ′ phase. Moreover, the presence of sub-grain boundaries provides some plasticity (ΕEL=5.4±0.7%). The deformation mechanism shows that the as-built samples mainly experience planar dislocations slipping, while the heat-treated samples undergo stacking faults (SFs) shearing and anti-phase boundaries (APB) shearing. The dominant mechanism among these is APB shearing. © 2024, The Authors. All rights reserved.

关键词： Recrystallization (metallurgy)

Three-Dimensional Porous Polyimide Anode For High-Rate Lithium Ion Batteries

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SSRN 2023年

作者： Zhang, Qiuyitong Wei, Zijie Xu, Yuexin Lv, Ning Li, Hanyang Zhao, Xue Tian, Tian Wang, Yadong Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China Xupu Central Primary School Yangzhou211400 China

Polymeric electrode materials suffer from poor electrical conductivity and slow transport kinetics, especially poor performance at high current density. Herein, a polyimide electrode structure with 3D ordered interconnected gradient pores is proposed for improving the lithium ion transport efficiency. The homogeneous mixed PMTA-PMMA composite is prepared by a simple one-pot method, and then the PMMA (polymethyl methacrylate) spherical porogenic agent is removed from it while synthesizing the polyimide material at high temperature to form a low curvature gradient pore structure. The large pores in the electrode can enhance the ion transport ability and improve the electrolyte infiltration rate, and the small pores can improve the active specific surface area and guide the deposition of lithium ions. The high specific capacity of 907mAh/g can be maintained even after 1000 cycles at 5A/g, which is about 3 times of the specific capacity of un-pored electrode material. This porous material with high active area and porosity is a potential electrode candidate for ultra-fast charging and discharging in lithium ion batteries, with high specific capacity and excellent cycling performance. © 2023, The Authors. All rights reserved.

关键词： Polyimides

Photothermal Antibacterial Mos2 Composited Chitosan Hydrogel for Infectious Wound Healing

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SSRN 2023年

作者： Wang, Yue Liu, Kun Huang, Kai Huang, Ye Dai, Honglian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory The Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

Pathological bacterial infection poses a serious threat to public health security. The excessive use of antibiotics has resulted in a serious decline in treatment effect and bacterial resistance. For the treatment of infected wounds, we compounded dopamine-assisted exfoliated molybdenum disulfide (MoS2@PDA) into lipoic acid modified chitosan (LAMC) to obtain a composite hydrogel dressing (LAMC-MoS2@PDA). LAMC-MoS2@PDA hydrogels exhibited excellent photothermal conversion ability and the LAMC-MoS2@PDA2 group has a photothermal conversion efficiency of 26.29%. Meanwhile, they showed good biocompatibility and ROS scavenging activity in vitro. Photothermal therapy usually utilizes photothermal agents to convert near-infrared light into heat energy, which is conducive to destroying bacterial cell membranes, leading to the inactivation of bacterial proteins. After simulated by the near-infrared light, the antibacterial ratio of LAMC-MoS2@PDA hydrogels against Escherichia coli and Staphylococcus aureus reached nearly 100%, and the morphology of the bacteria showed obvious contraction and cleavage. The hydrogels also showed an excellent antibacterial effect and wound healing promotion in the infected wound of rats. In particular, the LAMC-MoS2@PDA2 (+) group showed an almost complete wound closure after 14 days, indicating that the LAMC-MoS2@PDA hydrogels have great potential in clinic anti-infected treatment. © 2023, The Authors. All rights reserved.

关键词： Chitosan