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Deposition and etching of(101)_(Zn)facet exposed zinc electrode induced by trace COS achieving ultra-long cycle stability in zinc batteries

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Journal of Energy Chemistry 2025年第3期102卷 37-48页

作者： Keren Lu Haiyan Jing Qiubo Guo Cai Liu Boyuan Liu Xifeng Xia Fengyun Wang Wu Lei Mingzhu Xia Qingli Hao Key Laboratory for Soft Chemistry and Functional Materials Ministry of EducationSchool of Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094JiangsuChina

Rechargeable aqueous zinc-based batteries(RZBs)often suffer from poor cycling stability due to the instability of zinc deposition and etching *** work achieves dendrite-free zinc deposition with a smaller nucleation radius and rapid completion of the nucleation stage by a"triple regulation strategy"with trace chitosan oligosaccharide(COS)in ZnSO_(4)electrolyte(2 g L^(-1)COS),Theoretical and experimental results indicate that COS,with hydroxyl and amino functional groups,exhibits a high affinity for the(002)_(Zn)and(100)_(Zn)*** the influence of a small amount of COS,the selective exposure of the(101)_(Zn)facet is *** extensively exposed(101)_(Zn)facet is protected by COS,which inhibits the occurrence of side ***,the presence of trace COS-02 changes the etching mode from three-dimensional(3D)to two-dimensional(2D),ensuring a uniform distribution of Zn^(2+)in the electric field during the deposition *** unique 3D deposition and 2D etching mechanism induced by the COS additive result in exceptional cycling stability,exceeding 3800 h(1 mA cm^(-2))and 430 h(5 mA cm^(-2))in zinc symmetrical ***,COS acts as a"molecular pillar"to stabilize VS_(2),enabling the Zn‖VS_(2)full cell to achieve 1000 stable cycles with 89.6%capacity retention and an average coulombic efficiency of 99.95%.This work reveals a novel multiple regulation mechanism by using trace COS in RZBs,and provides a new approach for the development of long-term stable RZBs with preferential exposure facets.

关键词： Side reactions Shell oligosaccharides interface regulation Electrolyte additive Aqueous Znbatteries

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Renewable Fluorescent Liquid Crystal Elastomers for Potential Use in Temperature Indicator During Short-time Vaccine Transportation

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Chinese Journal of Polymer science 2025年第4期43卷 616-624页

作者： Xiao-Yang Cong Chen Yang De-Kang Guo Jin-Bao Guo Key Laboratory of Carbon Fibers and Functional Polymers Ministry of Educationand College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

With the rise in environmental awareness,the development of smart polymer materials is gradually becoming environmentally friendly and *** liquid crystal elastomers(LCE)can change their shape or optical properties in response to external stimuli,showing great potential for applications in sensing,information storage,and ***,their life cycle is often unsustainable and not in line with the circular economy *** on the principle of green chemistry,a fluorescent LCE was developed through the co-polymerization of multiple monomers with 1,2-dithiolane end groups,which exhibited excellent self-healing,reprocessing,and closed-loop *** addition,by tailoring the phase transition temperature of the LCE,the transparency and fluorescence intensity of the resulting material can change at a low temperature of 8.0℃.By further integrating light or acid/base-triggered fluorescence information,a proof-of-concept for temperature monitoring during short-time vaccine transportation using the reusable fluorescent LCE film is *** study establishes a new environmentally friendly manufacturing strategy for multifunctional LCE materials.

关键词： Liquid crystal elastomer 1 2-Dithiolane Reversible ring-opening polymerization Temperature monitor Renewable

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Layer-by-layer enriching active Ni-N_(3)C sites in nickel-nitrogen-carbon electrocatalysts for enhanced CO_(2)-to-CO reduction

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Chinese Chemical Letters 2023年第12期34卷 333-338页

作者： Yongqi Ren Ruopeng Chang Xu Hua Junjie Guo Guangping Hao Anhui Lu State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsLiaoning Key Laboratory for Catalytic Conversion of Carbon ResourcesSchool of Chemical EngineeringDalian Universityof TechnologyDalian 116024China Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

Transition metal and nitrogen co-doped carbons(M-N-C)have proven to be promising catalysts for CO_(2)electroreduction into co because of the high activity and *** enrichment of the active transition metal coordinated nitrogen sites is desirable but is challenging for a practical volumetric ***,we report four kinds of model electrocatalysts to unveil this issue,which include the NC structures with surface N-functionalities,Ni-N-CI with one layer of surface Ni-NsC sites,NC@Ni-N-CI with surface N-functionalities and underneath Ni-N3C sites as well as Ni-N-C_II with doubled surface Ni-NsC *** X-ray absorption spectroscopy indicates the coordination configuration of *** NC catalysts,when N-doping level increased from 3.5 at%to 8.4 at%,the CO partial current density increased from below 0.1 mA/cm^(2)to 3 mA/cm^(2).Introducing one layer of Ni-N_(3)C onto the NC structures leads to a 54 times higher CO partial current density than that of NC,in the meantime the FE_(CO) is 66 times ***,doubling the density of surface Ni-N_(3)C sites by a layer-by-layer method doubles the CO partial current density Gco,indicating its potential to achieve a high density of active coordinated sites and current densities.

关键词： Porous carbons Nanocarbons CO_(2)electroreduction M-N_(3)C structure Nonprecious electrocatalysts

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In situ observation of the electrochemical behavior of Li–CO_(2)/O_(2)batteries in an environmental transmission electron microscope

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Carbon Energy 2024年第4期6卷 244-255页

作者： Peng Jia Yunna Guo Dongliang Chen Jingming Yao Xuedong Zhang Jianguo Lu Yuqing Qiao Liqiang Zhang Hebei Key Laboratory of Applied Chemistry College of Environmental and Chemical EngineeringYanshan UniversityQinhuangdaoChina State Key Laboratory of Metastable Materials Science and Technology Clean Nano Energy CenterYanshan UniversityQinhuangdaoChina State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and EngineeringZhejiang UniversityHangzhouChina Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education School of Materials Science and EngineeringXiangtan UniversityXiangtanChina

Li–CO_(2)/O_(2)batteries,a promising energy storage technology,not only provide ultrahigh discharge capacity but also capture CO_(2)and turn it into renewable *** electrochemical reaction pathways'ambiguity,however,creates a hurdle for their practical *** study used copper selenide(CuSe)nanosheets as the air cathode medium in an environmental transmission electron microscope to in situ study Li–CO_(2)/O_(2)(mix CO_(2)as well as O_(2)at a volume ratio of 1:1)and Li–O_(2)batteries as well as Li–CO_(2)*** discharge reactions take place successively in the Li–CO_(2)/O_(2)–CuSe nanobattery:(I)4Li^(+)+O_(2)+4e^(−)→2Li_(2)O;(II)Li_(2)O+CO_(2)→Li_(2)CO_(3).The charge reaction proceeded via(III)2Li_(2)CO_(3)→4Li^(+)+2CO_(2)+O_(2)+4e^(−).However,Li–O_(2)and Li–CO_(2)nanobatteries showed poor cycling stability,suggesting the difficulty in the direct decomposition of the discharge *** fluctuations of the Li–CO_(2)/O_(2)battery's electrochemistry were also shown to depend heavily on O_(2).The CuSe‐based Li–CO_(2)/O_(2)battery showed exceptional electrochemical *** Li^–CO_(2)/O_(2)battery offered a discharge capacity apex of 15,492 mAh g^(−1) and stable cycling 60 times at 100 mA g^(−1).Our research offers crucial insight into the electrochemical behavior of Li–CO_(2)/O_(2),Li–O_(2),and Li–CO_(2)nanobatteries,which may help the creation of high‐performance Li–CO_(2)/O_(2)batteries for energy storage applications.

关键词： CuSe nanosheets electrochemical reaction in situ environmental transmission electron microscopy Li-CO_(2)battery Li-CO_(2)/O_(2)battery Li-O_(2)battery

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Covalence bridge atomically precise metal nanocluster and metalorganic frameworks for enhanced photostability and photocatalysis

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Nano Research 2023年第1期16卷 1527-1532页

作者： Aimin Yao Yuanxin Du Meng Han Yan Wang Jiashen Hu Qingtao Zhu Hongting Sheng Manzhou Zhu Department of Materials Science and Engineering Centre for Atomic Engineering of Advanced MaterialsKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationKey Laboratory of Functional Inorganic Material Chemistry of Anhui ProvinceAnhui UniversityHefei 230601China

Metal nanoclusters(NCs)with precise structure and ultrasmall size have attracted great interests in ***,the poor stability has limited its large-scale ***,we proposed the“covalence bridge”strategy to effectively connect atomically precise metal NCs and metal-organic *** from the covalent linkage,the synthesized UiO-66-NH2-Au25(LCys)18 showed outstanding stability after 16 h ***,the covalence bridge created a strong metal-support interaction between the two components and provided an effective charge transport channel and thereby enhanced photocatalytic ***-66-NH2-Au25(L-Cys)18 displayed an exceptional photocatalytic H2 production rate,which is 21 and 90 times higher than that of UiO-66-NH2/Au25(PET)18(made by physically combination)and bare UiO-66-NH2,*** and kinetic studies demonstrated that UiO-66-NH2-Au25(L-Cys)18 exhibited higher charge transfer efficiency,lower overpotential of water reduction and activation energy barrier compared with its counterparts.

关键词： atomically precise nanoclusters metal-organic frameworks covalent binding photostability photocatalytic hydrogen production

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Electrolyte-gated SrCoO_(x) FET sensor for highly sensitive detecting pH in extreme alkalinity solution

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Nano Research 2024年第4期17卷 3079-3086页

作者： Han Zhou Gaocan Qi Wenbin Li Yuhang Wang Zhihao Yuan School of Materials Science and Engineering Tianjin Key Lab of Photoelectric Materials&Devicesand Key Laboratory of Display Materials and Photoelectric Devices(Ministry of Education)Tianjin University of TechnologyTianjin 300384China

The pH monitoring is significantly important in chemical industry,biological process,and pollution ***,it remains a great challenge to measure pH in extreme alkalinity ***,we employ an electrolyte-gated field-effect-transistor(FET)strategy using non-stoichiometric SrCoO_(x) with rich oxygen-vacancy defects as channel materials for detecting extreme *** corresponding channel can provide effective oxygen-ion-migration sites for reversible transformation of OH-↔O_(2)-+H^(+)driven by electric *** resultant electrolyte-gated FET sensor exhibits a sensitive linear response to high concentrations of alkaline solution,1–20 ***,the sensor has the ability to directly indicate the pH values ranging from 14.0 to 17.0 in consideration of ion-activity coefficient *** work offers a great possibility for directly detecting base concentration as well as pH values in extreme alkaline solutions.

关键词： field-effect-transistor(FET) pH sensor extreme alkaline solution SrCoO_(x) oxygen-ion migration

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Preparation and Mechanical Properties of Bionic Carbon Fiber/Epoxy Resin Composites Inspired by Owl Feather

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Journal of Bionic engineering 2025年第1期22卷 282-292页

作者： Zerun Yu Jiaan Liu Tian Yang Linyang Zhang Chunhua Hu Key Laboratory of Automobile Materials(Ministry of Education) College of Materials Science and EngineeringJilin UniversityChangchun130022China National Key Laboratory of Advanced Vehicle Integration and Control General R&D InstituteChina FAW Co.LtdChangchun130011China

Insufficient interfacial activity and poor wettability between fibers and matrix are the two main factors limiting the improvement of mechanical properties of Carbon Fiber Reinforced Plastics(CFRP).Owl feathers are known for their unique compact structure;they are not only lightweight but also *** this study,an in-depth look at owl feathers was made and it found that owl feathers not only have the macro branches structure between feather shafts and branches but also have fine feather structures on the *** presence of these fine feather structures increases the specific surface area of the plume branches and allows neighboring plume branches to hook up with each other,forming an effective mechanical interlocking *** structures bring owl feathers excellent mechanical *** by the natural structure of owl feathers,a weaving technique and a sizing process were combined to prepare bionic Carbon Fiber(CF)fabrics and then to fabricate the bionic CFRP with structural characteristics similar to owl *** evaluate the effect of the fine feather structure on the mechanical properties of CFRP,a mechanical property study on CFRP with and without the fine feather imitation structure were *** experimental results show that the introduction of the fine feather branch structure enhance the mechanical properties of CFRP ***,the tensile strength of the composites increased by 6.42%and 13.06%and the flexural strength increased by 8.02%and 16.87%in the 0°and 90°sample directions,*** results provide a new design idea for the improvement of the mechanical properties of the CFRP,promoting the application of CFRP in engineering fields,such as automotive transportation,rail transit,aerospace,and construction.

关键词： Carbon fiber reinforced epoxy composites Owl feather Bionic feather structure Mechanical properties

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Elements gradient doping in Mn-based Li-rich layered oxides for long-life lithium-ion batteries

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材料科学技术（英文版） 2025年第4期207卷 266-273页

作者： Yinzhong Wang Shiqi Liu Xianwei Guo Boya Wang Qinghua Zhang Yuqiang Li Yulong Wang Guoqing Wang Lin Gu Haijun Yu Institute of Advanced Battery Materials and Devices College of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Institute of Advanced Battery Materials and Devices College of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Beijing Create Energy & Benefit Future Co. Ltd.Beijing 100176China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China National Center of Electron Microscopy in Beijing School of Materials Science and EngineeringTsinghua UniversityBeijingChina

The cobalt-free Mn-based Li-rich layered oxide material has the advantages of low cost,high energy den-sity,and good performance at low temperatures,and is the promising choice for energy storage ***,the long-cycling stability of batteries needs to be ***,the Mn-based Li-rich cath-ode materials with small amounts of Li2MnO3 crystal domains and gradient doping of Al and Ti elements from the surface to the bulk have been developed to improve the structure and interface *** the batteries with a high energy density of 600 Wh kg-1,excellent capacity retention of 99.7％with low voltage decay of 0.03 mV cycle-1 after 800 cycles,and good rates performances can be ***,the structure and cycling stability of low voltage Mn-based Li-rich cathode materials can be significantly improved by the bulk structure design and interface regulation,and this work has paved the way for developing low-cost and high-energy Mn-based energy storage batteries with long lifetime.

关键词： Mn-based Li-rich layered oxide cathode Li2MnO3 crystal domain Elemental gradient Lithium-ion batteries Energy storage

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Concerted Steric and Electronic Strategy in Thermostable Salicylaldiminato Nickel Catalysts for Ethylene(Co)polymerization

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Chinese Journal of Polymer science 2024年第8期42卷 1085-1092页

作者： Hong-Yu Ji Hong-Liang Mu Chun-Feng Tang Yu-Xing Zhang Yue Chi Zhong-Bao Jian Key Laboratory of Advanced Structural Materials Ministry of EducationSchool of Materials Science and EngineeringChangchun University of TechnologyChangchun 130012China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Olefin polymerization is one of the most im portant chemical reactions in *** work presents a strategy that emphasizes the synergistic meta/poro-steric hindrance of N-aryl groups and electronic effects in newly synthesized neutral salicylaldiminato nickel *** nickel(Ⅱ)catalysts exhibit exceptional thermostability,ranging from 30℃to 130℃,demonstrating enhanced catalytic activities and broadly regulated polyethylene molecular weights(3-341 kg·mol^(-1))and controlled polymer branch density(2-102 brs/1000C).The preferred catalyst Ni3 with concerted steric and electronic effects enables the production of solid-state semi-crystalline polyethylene materials at temperatures below 90℃.Notably,Ni3 exhibits an impressive tolerance of 110℃and can withstand even the challenging polymerization temperature of 130℃,leading to the production of polyethylene wax and ***,functionalized polyethylene is produced.

关键词： Polyolefin Salicylaldiminato ligand Nickel catalyst Oil Wax

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Decomposition of pre-existing Au-P clusters induced in situ a-Fe grains uniformization in Fe-P-based nanocrystalline alloys

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Rare Metals 2024年第10期43卷 5242-5255页

作者： Min-Hao Han Cheng Sun Guo-Guo Xi Yang Meng Qiang Luo Xue-Qian Yu Wen-Feng Zhang Hao Liu Hong-Jie Xu Tao Zhang Key Laboratory of Aerospace Materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing 100191China Laboratory of Functional Fiber Materials Institute of Bast Fiber CropsChinese Academy of Agricultural ScienceChangsha 410205China School of Materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjing 211189China Institute for Advanced Materials North China Electric Power UniversityBeijing 102206China Center for Advanced Analysis and Computational Science Zhengzhou UniversityZhengzhou 450001China

In Fe-based amorphous-/nanocrystalline ribbons,the uniformization and refinement of a-Fe grains are key aspects for optimizing their soft magnetic and mechanical ***,the Fe-P-C-B nanocrystalline alloy system was selected for *** produced as-spun ribbons with pre-existing nanocrystals through melt-quenching and then obtained a well-distributed a-Fe nanocrystalline structure through annealing below the first crystallization onset temperature(633 K)resulting in excellent magnetic properties(saturation magnetization of 1.65 T and coercivity of 1.6 A·m^(-1))ultra-wide annealing temperature window(from 613 to 733 K),and extremely high annealing stability(up to 480 min at 633 K).Furthermore,we propose a new in situ two-step mechanism for the uniformization of a-Fe nanocrystals,which is separately induced by the decomposition of the Au-P clusters and the pre-existing a-Fe nanocrystals during *** work underscores the crucial significance of micro-alloying via metastable clusters primarily influenced by metal-phosphide interactions in the process of refining a-Fe ***,i introduces a new principle for optimizing the comprehensive properties of Fe-based amorphous/nanocrystalline alloys.

关键词： Fe-based nanocrystalline alloys Soft magnetic property In-situ nano-crystallization Microalloying

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