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可穿戴柔性超级电容器用强韧、自修复、抗冻的三角色铁氰化钾氧化还原凝胶聚合物电解质

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Science China materials 2023年第5期66卷 1779-1792页

作者：杨佳王梦晓陈涛于翔秦刚方潇焓苏晓翔陈强 henan key laboratory of materials on Deep-Earth Engineering Henan Polytechnic UniversityJiaozuo 454003China College of materials Engineering Henan University of EngineeringZhengzhou 451191China School of materials Science and Engineering Henan Polytechnic UniversityJiaozuo 454003China School of materials Science and Engineering Tongji UniversityShanghai 200092China Do-Fluoride New materials Co. Ltd.Jiaozuo 454191China Wenzhou Institute University of Chinese Academy of SciencesWenzhou 352001China

超级电容器的韧性、自修复和高比电容对于柔性和可穿戴电子设备具有重要的实用价值.为此,我们制备了一种新型的聚乙烯醇-海藻酸钠-铁氰化钾-硫酸钠多功能凝胶聚合物电解质.其中铁氰化钾起到了三角色作用,包括载流子供体、离子交联剂和... 详细信息

超级电容器的韧性、自修复和高比电容对于柔性和可穿戴电子设备具有重要的实用价值.为此,我们制备了一种新型的聚乙烯醇-海藻酸钠-铁氰化钾-硫酸钠多功能凝胶聚合物电解质.其中铁氰化钾起到了三角色作用,包括载流子供体、离子交联剂和氧化还原活性剂,有效地缓解了凝胶聚合物电解质通常存在的电导率与机械性能间的矛盾.此外,由于铁氰化钾的氧化还原反应提供了赝电容,组装的超级电容器具有很高的电极比电容和能量密度.该超级电容器还表现出优异的弯曲、拉伸、自修复和抗冻能力.因而,制备的凝胶聚合物电解质和超级电容器在复杂使用条件下的柔性和可穿戴电子设备中具有广阔的应用前景.

关键词： gel polymer electrolyte self-healability anti-freezing redox-activity flexible supercapacitor

Recent advances in graphene oxide catalyzed organic transformations

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Chinese Chemical Letters 2022年第5期33卷 2354-2362页

作者： Fan Gao Shouren Zhang Qiyan Lv Bing Yu School of Biology College of ChemistryZhengzhou UniversityZhengzhou 450001China henan key laboratory of Nanocomposites and applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006China

Graphene oxide(GO),as a metal-free and readily available carbocatalyst,has been extensively applied in catalytic organic transformations.This minireview aims to give an overview of the progress on the application of n... 详细信息

关键词： Graphene oxide Metal-free Carbocatalyst Eco-friendly

Green recycling of short-circuited garnet-type electrolyte for high-performance solid-state lithium batteries

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Journal of Energy Chemistry 2023年第5期80卷 492-500,I0012页

作者： Yongxian Huang Zhiwei Qin Cheng Shan Yuming Xie Xiangchen Meng Delai Qian Gang He Dongxin Mao Long Wan State key laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046HenanChina School of materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Solid-state lithium batteries(SSLBs)solve safety issues and are potentially energy-dense alternatives to next-generation energy storage systems.Battery green recycling routes are responsible for the widespread use of SSLBs due to minimizing environmental contamination,reducing production costs,and providing a sustainable solution for resources,e.g.,saving rare earth elements(La,Ta,etc.).Herein,a solid-state recycling strategy is proposed to achieve green recycling of the crucial component solidstate electrolytes(SSEs)in spent SSLBs.The short-circuited garnet Li_(6.5)La_(3)Zr_(1.5)Ta_(0.5)O_(12)(LLZTO)is broken into fine particles and mixed with fresh particles to improve sintering activity and achieve high packing density.The continuous Li absorption process promotes sufficient grain fusion and guarantees the transformation from tetragonal phase to pure cubic phase for high-performance recycled LLZTO.The Li-ion conductivity reaches 5.80×10^(-4)S cm-1with a relative density of 95.9%.Symmetric Li cell with asrecycled LLZTO shows long-term cycling stability for 700 h at 0.3 mA cm^(-2)without any voltage hysteresis.Full cell exhibits an excellent cycling performance with a discharge capacity of 141.5 mA h g^(-1)and a capacity retention of 92.1%after 400 cycles(0.2C).This work develops an environmentally friendly and economically controllable strategy to recycle SSE from spent SSLBs,guiding future directions of SSLBs large-scale industrial application and green recycling study.

关键词： Solid-state electrolytes Li-garnet Green recycling Solid-state lithium batteries Cycling stability

Multimodal SocialMedia Fake News Detection Based on Similarity Inference and Adversarial Networks

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Computers, materials & Continua 2024年第4期79卷 581-605页

作者： Fangfang Shan Huifang Sun Mengyi Wang College of Computer Zhongyuan University of TechnologyZhengzhou450007China henan key laboratory of Cyberspace Situation Awareness Zhengzhou 450001China

As social networks become increasingly complex, contemporary fake news often includes textual descriptionsof events accompanied by corresponding images or videos. Fake news in multiple modalities is more likely tocreate a misleading perception among users. While early research primarily focused on text-based features forfake news detection mechanisms, there has been relatively limited exploration of learning shared representationsin multimodal (text and visual) contexts. To address these limitations, this paper introduces a multimodal modelfor detecting fake news, which relies on similarity reasoning and adversarial networks. The model employsBidirectional Encoder Representation from Transformers (BERT) and Text Convolutional Neural Network (Text-CNN) for extracting textual features while utilizing the pre-trained Visual Geometry Group 19-layer (VGG-19) toextract visual features. Subsequently, the model establishes similarity representations between the textual featuresextracted by Text-CNN and visual features through similarity learning and reasoning. Finally, these features arefused to enhance the accuracy of fake news detection, and adversarial networks have been employed to investigatethe relationship between fake news and events. This paper validates the proposed model using publicly availablemultimodal datasets from Weibo and Twitter. Experimental results demonstrate that our proposed approachachieves superior performance on Twitter, with an accuracy of 86%, surpassing traditional unimodalmodalmodelsand existing multimodal models. In contrast, the overall better performance of our model on the Weibo datasetsurpasses the benchmark models across multiple metrics. The application of similarity reasoning and adversarialnetworks in multimodal fake news detection significantly enhances detection effectiveness in this paper. However,current research is limited to the fusion of only text and image modalities. Future research directions should aimto further integrate features fromadditionalmodalities to comprehensiv

关键词： Fake news detection attention mechanism image-text similarity multimodal feature fusion

Hyperbranched magnetic polymer:highly efficient removal of Cr(Ⅵ)and application in electroplating wastewater

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Frontiers of Chemical Science and Engineering 2023年第10期17卷 1568-1580页

作者： Nan Sun Qing Wu Lifang Jin Zichen Zhu Jianhui Sun Shuying Dong Haijiao Xie Chunyan Zhang Yanrui Cui key laboratory for Yellow River and Huai River Water Environmental and Pollution Control Ministry of Educationand Henan Key Laboratory for Environmental Pollution ControlSchool of EnvironmentHenan Normal UniversityXinxiang 453007China

By using a two-step hydrothermal method and trithiocyanuric acid(TTCA),2,4,6-trihydrazino-1,3,5-triazine(THT),and Fe_(3)O_(4)as raw materials,a spherical magnetic adsorbent polymer(TTCA/THT@Fe_(3)O_(4))was synthesized to achieve the efficient removal of Cr(VI)from wastewater.Under optimal adsorption conditions,the maximum adsorption capacity of TTCA/THT@Fe_(3)O_(4)for Cr(VI)can reach 1340 mg∙g‒1.Notably,the removal efficiency can approach 98.9%,even at the lower concentration of 20 mg∙L^(‒1)Cr(VI).For actual wastewater containing Cr(VI),the Cr(VI)concentration was reduced from 25.8 to 0.4 mg∙L^(‒1),a remarkable 20%lower than the current industry discharge standard value.A mechanism for the high adsorption performance of Cr(VI)on TTCA/THT@Fe_(3)O_(4)was investigated using Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,and density functional theory.It can be plausibly attributed to the formation of Cr/N and Cr/S coordination bonds.Additionally,surface electrostatic adsorption,reduction effects,and the spherical polymer structure increase the contact area with Cr(VI),maximizing adsorption.The synergistic effect of adsorption and reduction enhances the adsorption performance of TTCA/THT@Fe_(3)O_(4)for Cr(VI)and total chromium in water.The resultant polymer has a simple preparation process,excellent adsorption performance,easy magnetic separation,and promising application for actual wastewater.

关键词： magnetic polymer chromium removal hydrogen bonding recyclability actual wastewater

Effects of strain rates on dynamic deformation behavior of Cu-20Ag alloy

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Journal of materials Science & technology 2021年第20期79卷 75-87页

作者： Kexing Song Yongfeng Geng Yijie Ban Yi Zhang Zhou Li Xujun Mi Jun Cao Yanjun Zhou Xuebin Zhang School of materials Science and Engineering Henan University of Science and TechnologyLuoyang471023China Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New materials and Advanced Processing technology Henan ProvinceLuoyang471023China henan Province key laboratory of Nonferrous materials Science and Processing technology Luoyang471023China School of materials Science and Engineering Central South UniversityChangsha410083China General Research Institute for Nonferrous Metals Beijing100088China henan Polytechnic University Henan ProvinceJiaozuo454010China

Copper alloy is widely used in high-speed railway,aerospace and other fields due to its excellent electrical conductivity and mechanical properties.High speed deformation and dynamic loading under impact load is a complex service condition,which widely exists in the field of national defense,military and industrial application.Therefore,the dynamic deformation behavior of the Cu-20Ag alloy was investigated by Split Hopkinson Pressure Bar(SHPB)with the strain rates of 1000-25000 s^(-1),high-speed hydraulic servo material testing machine with the strain rates of 1-500 s^(-1).The effect of strain rate on flow stress and adiabatic shear sensitivity was analyzed.The results show that the increase of strain rate will increase the flow stress and critical strain,that is to say,the increase of strain rate will reduce the adiabatic shear sensitivity of the Cu-20Ag alloy.The Cu-Ag interface has obvious orientation relationship with;(111)_(Cu)//(111)_(Ag):(^(-)111)_(Cu)//(^(-)111)_(Ag):(^(-)200)_(Cu)//(^(-)200)_(Ag) and [0^(-)11]_(Cu)//[0^(-)11]_(Ag) with the increase of strain rate.The increase of strain rate promotes the precipitation of Ag and increases the number of interfaces in the microstructure,which hinders the movement of dislocations and improves the stress and yield strength of the Cu-20Ag alloy.The concentration and distribution density of dislocations and the precipitation of Ag were the main reasons improve the flow stress and yield strength of the Cu-20Ag alloy.

关键词： Cu-20Ag alloy Dynamic deformation Split Hopkinson Pressure Bar Adiabatic shear sensitivity

Skin care design for lithium metal protection with cosmetics introduction

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Journal of Energy Chemistry 2020年第9期29卷 383-389,I0011页

作者： Yurong Tu Qingtao Ma Aoxuan Wang Xinyue Zhang Guojie Li Jiayan Luo Xingjiang Liu key laboratory for Green Chemical technology of Ministry of Education State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Ministry of Education Key Laboratory of Materials Processing and Mold(Zhengzhou University)Zhengzhou 450002HenanChina National key laboratory of Science and technology on Power Sources Tianjin Institute of Power SourcesTianjin 300384China

Lithium metal anode(LMA)is the ultimate"Holy Grail"electrode for next generation high-energy-density batteries.Nevertheless,its instinct high reactivity is a formidable challenge and has intensified side reactions,destabilized the electrode/electrolyte interface and restricted the operating conditions strictly,thus hampering its practical application.Here,we"make up"the Li metal(M-Li)by constructing vaselinecoated layer by a simple dip-coating or casting method.With the chemically stable and hydrophobic vaseline protective layer,the stability of Li towards humid and corrosive atmosphere has been greatly improved.The M-Li guaranteed stable and prolonged cycling life after the anode suffering from corrosion in moist air(relative humidity-65%)or corrosive electrolyte(with 10,000 ppm H2O or S)both in symmetric cells and LiFePO4 full cells.This work illustrates a convenient,economic,and industrial applicable method for stable LMA.

关键词： Li metal anode Interface Vaseline Corrosion resistance Industrial process

Covalent organic framework shows high isobutene adsorption selectivity from C_(4) hydrocarbons:Mechanism of interpenetration isomerism and pedal motion

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Green Energy & Environment 2022年第2期7卷 296-306页

作者： Wei Chen Mian Li Wen-Li Peng Ling Huang Chao Zhao Dinesh Acharya Wentao Liu Anmin Zheng State key laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in WuhanKey Laboratory of Magnetic Resonance in Biological SystemsWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430071China Department of Chemistry and key laboratory for Preparation and application of Ordered Structural materials of Guangdong Province Shantou UniversityGuangdong515063China Chemistry and Chemical Engineering Guangdong laboratory Shantou515031China Wuhan National laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China School of materials Science and Engineering Zhengzhou UniversityZhengzhouHenan450001China University of Chinese Academy of Sciences Beijing100049China

Adsorption and separation of C_(4) hydrocarbons are crucial steps in petrochemical processes.Employment of porous materials for enhancing the separation efficiency have paid much attention.Covalent-organic frameworks of diamond-topology,dia-COFs,often exhibit unique structural properties such as interpenetration isomerism and pedal motion.Herein,in order to get a deep insight into the structure-performance correlation of such dia-COFs,a series of dia-COF materials have been proposed and theoretically investigated on the C_(4) separation.It is found that these dia-COFs display an excellent adsorption and separation property towards isobutene with respect to other C_(4) hydrocarbons(i.e.,1,3-butadiene,1-butene,2-cis-butene,2-trans-butene,isobutane and n-butane).What’s more,the correlation between the topology parameters and experimental synthesis feasibility has been established for COF-300(dia-cN),and the unreported COF-300(dia-c3) is predicted to be experimentally feasible synthesized.Our findings not only provide a deep insight into the mechanism of topology characteristics of dia-COFs on C_(4) adsorption and separation properties but also guide the design and synthesis of novel highly-effective porous materials.

关键词： adsorption hydrocarbons separation

Polymer matrix wave-transparent composites:A review

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Journal of materials Science & technology 2021年第16期75卷 225-251页

作者： Lin Tang Junliang Zhang Yusheng Tang Jie kong Tianxi Liu Junwei Gu Shaanxi key laboratory of Macromolecular Science and technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China State key laboratory for Modification of Chemical Fibers and Polymer materials Donghua University.Shanghai 201620China School of materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China

With the rapid development of electronic information technology,antenna systems in the fields of aviation,aerospace,transportation,and 5 G communication services are becoming more and more intensive and accurate.Polymer matrix wave-transparent composites with lightweight,low dielectric constant(∈)and dielectric loss tangent(tanδ),high temperature resistance,and excellent mechanical properties are urgently needed in order to ensure high-fidelity transmission of electromagnetic wave and protect antenna systems from external interference.This review introduces the wave transmission mechanism,key compositions(polymer matrix&reinforced fibers),and several typical testing methods for dielectric properties of polymer matrix wave-transparent composites,mainly elaborates the latest research progress and achievements of polymer matrix wave-transparent composites from polymer matrix,reinforced fibers and their surface functionalization methods,and presents the key scientific and technical problems that need to be solved urgently in the application of polymer matrix wave-transparent composites in the antenna systems.Finally,the future development trends and application prospects of the polymer matrix wave-transparent composites are also proposed.

关键词： Polymer matrix wave-transparent composites Reinforced fibers Surface functionalization Testing methods application prospect