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Revisiting aluminum current collector in lithium-ion batteries:Corrosion and countermeasures

Journal of Energy Chemistry 2024年第2期89卷 610-634,I0014页

作者： Shanglin Yang Jinyan Zhong Songmei Li Bin Li Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education School of Materials Science&EngineeringBeihang UniversityBeijing 100191China

With the large-scale service of lithium-ion batteries(LIBs),their failures have attracted significant *** the decay of active materials is the primary cause for LIB failures,the degradation of auxiliary materials,such as current collector corrosion,should not be ***,it is necessary to conduct a comprehensive review in this *** this review,from the perspectives of electrochemistry and materials,we systematically summarize the corrosion behavior of aluminum cathode current collector and propose corresponding ***,the corrosion type is clarified based on the properties of passivation layers in different organic electrolyte ***,a thoroughgoing analysis is presented to examine the impact of various factors on aluminum corrosion,including lithium salts,organic solvents,water impurities,and operating ***,strategies for electrolyte and protection layer employed to suppress corrosion are discussed in *** and most importantly,we provide insights and recommendations to prevent corrosion of current collectors,facilitate the development of advanced current collectors and the implementation of next-generation high-voltage stable LIBs.

关键词： Lithium-ion battery Aluminum current collector Corrosion Electrochemical performance Electrolyte Protective layer

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New strategy for efficient manufacturing of bulk anisotropic nanocrystalline Nd-Fe-B permanent magnets

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Journal of materials science & Technology 2024年第34期201卷 119-129页

作者： Qian Li Lingqi Liu Yuqing Li Ming Yue Yuan Teng Weiqiang Liu Dongtao Zhang School of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing 100124China

The application of bulk nanocrystalline Nd-Fe-B permanent magnets manufactured by hot deformation methods was severely limited by production ***,this work proposed an efficient prepa-ration method combining hot rolling and *** the melt-spun Nd-Fe-B magnetic powders as original materials,dense,large-sized,and well-uniform precursors for deformation can be obtained through cold pressing and hot *** large-sized hot-rolled magnet can be cut into small pieces and subjected to hot *** deformed magnet exhibits obvious crystallographic anisotropy,and the optimal maximum energy product can reach 35.7 ***,the mechanism of defor-mation and texture formation has been systematically studied,according to the microstructure and tex-ture characterization of different height reduction *** results indicated that there was a typical heterogeneous structure in the hot-rolled and hot-deformed Nd-Fe-B *** precipitation,grain growth,and regular grain arrangement were the main reasons for deformation and texture forma-tion during the deformation *** strategy of replacing traditional hot-pressing with large-sized hot-rolling can produce massively deformed precursors at once,greatly improving production efficiency,which is crucial for promoting the application of bulk nanocrystalline anisotropic Nd-Fe-B permanent magnets.

关键词： Anisotropic Nd-Fe-B magnet Hot rolling Hot deformation Deformation behavior Magnetic properties

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One-pot modulated construction of Ni-MOF/NiFe_(2)O_(4) heterostructured catalyst for efficient oxygen evolution

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Rare Metals 2024年第12期43卷 6751-6757页

作者： Xing-Yu Guo Zhi-Qiang Yang Jing Zhao Rui Liu Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education School of Materials Science and EngineeringTongji UniversityShanghai201804China

Metal-organic framework (MOF)-based heterostructured materials have been widely investigated in the field of ***,the existing prepared methods of MOF-based heterostructured materials still suffer from some drawbacks,such as harsh conditions and complicated multistep synthetic ***,a one-pot modulated method is developed for preparing MOF-bimetallic oxide heterostructured catalyst for oxygen evolution reaction (OER).

关键词： catalyst preparing evolution

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Highly efficient and photothermally stable CDs@ZIF-8 for laser illumination

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Chinese Chemical Letters 2024年第10期35卷 273-277页

作者： Zhi Wang Lingpeng Yan Yelin Hao Jingxia Zheng Yongzhen Yang Xuguang Liu Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

Carbon dots(CDs),as a solid-state phosphor,have great potential for application in a new solid-state lighting device—laser diode(LD).For high efficiency LD devices,both high photoluminescence quantum yield(PLQY)and high photothermal stability of CDs are ***,yellow CDs@ZIF-8 composites with high structural stability were prepared by encapsulating CDs in zeolitic imidazolate framework-8(ZIF-8)through electrostatic adsorption between CDs and ZIF-8,in which CDs with amino groups on the surface were used as luminescent feeders and ZIF-8 was used as a protective layer *** asprepared CDs@ZIF-8 not only possess a high PLQY of up to 81.17%,but also maintain a high fluorescence intensity of 100%and 80%under long-term illumination(60 min)and high temperature(478 K),*** hydrogen bonding between CDs and ZIF-8 in the encapsulated structure can enhance the degree of electron cloud delocalization,which can improve the PLQY of CDs@***,CDs@ZIF-8has high photothermal stability due to the binding effect of ZIF-8 on CDs and high thermal stability of *** white LD device,fabricated from CDs@ZIF-8 as a phosphor in combination with 450 nm blue LD,has a color coordinate of(0.37,0.33),a color temperature of 3762 K,and a high color rendering index of *** study provides a new strategy for the construction of solid-state phosphors with high PLQY and high photothermal performance.

关键词： Carbon dots Metal-organic frameworks High photothermal stability High photoluminescence quantum yield Laser illumination

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Defect engineering with Rational Dopants Modulation for High‑Temperature Energy Harvesting in Lead‑Free Piezoceramics

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Nano-Micro Letters 2025年第3期17卷 87-101页

作者： Kaibiao Xi Jianzhe Guo Mupeng Zheng Mankang Zhu Yudong Hou Key Laboratory of Advanced Functional Materials Ministry of EducationCollege of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124People’s Republic of China

High temperature piezoelectric energy harvester(HTPEH)is an important solution to replace chemical battery to achieve independent power supply of HT wireless ***,simultaneously excellent performances,including high figure of merit(FOM),insulation resistivity(ρ)and depolarization temperature(Td)are indispensable but hard to achieve in lead-free piezoceramics,especially operating at 250°C has not been reported ***,well-balanced performances are achieved in BiFeO3–BaTiO3 ceramics via innovative defect engineering with respect to delicate manganese *** to the synergistic effect of enhancing electrostrictive coefficient by polarization configuration optimization,regulating iron ion oxidation state by high valence manganese ion and stabilizing domain orientation by defect dipole,comprehensive excellent electrical performances(Td=340°C,ρ250°C>10^(7)Ωcm and FOM_(250°C)=4905×10^(–15)m^(2)N^(−1))are realized at the solid solubility limit of manganese *** HT-PEHs assembled using the rationally designed piezoceramic can allow for fast charging of commercial electrolytic capacitor at 250°C with high energy conversion efficiency(η=11.43%).These characteristics demonstrate that defect engineering tailored BF-BT can satisfy high-end HT-PEHs requirements,paving a new way in developing selfpowered wireless sensors working in HT environments.

关键词： Lead-free piezoceramic Defect engineering Dopants modulation High-temperature Piezoelectric energy harvester

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Soft Crawling and Flipping Robots Based on Liquid Metal-Liquid Crystal Elastomer Composites

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Chinese Journal of Polymer science 2025年第4期43卷 588-596页

作者： Ling-Xin Yuan Chang-Yue Liu Ji-Ping Yang Zhi-Jian Wang Key Laboratory of Aerospace Advanced Materials and Performance Ministry of EducationSchool of Materials Science and EngineeringBeihang UniversityBeijing 100191China Tianmushan Laboratory Hangzhou 310023China

Soft robots have shown great advantages with simple structure,high degree of freedom,continuous deformation,and benign human-machine *** the past decades,a variety of soft robots,including crawling,jumping,swimming,and climbing robots,have been developed inspired by living ***,most of the reported bionic soft robots have only a single mode of motion,which limits their practical ***,we report a fully 3D printed crawling and flipping soft robot using liquid metal incorporated liquid crystal elastomer(LM-LCE)composite as the *** the application of voltage,liquid metal works as the conductive Joule heating material to induce the contraction of the LCE *** bending angle of the LM-LCE composite actuator highly depends on the applied *** further demonstrate that the soft robot can exhibit distinct moving behaviors,such as crawling or flipping,by applying different *** fully 3D printed LM-LCE composite structure provides a strategy for the fast construction of soft robots with diverse motion modes.

关键词： Liquid crystal elastomer Liquid metal Soft actuator 3D printing

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Insight into the Solution Self-Assembly of Amphiphilic Asymmetric Brush Copolymers via Computer Simulations

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Chinese Journal of Polymer science 2025年第1期43卷 132-140,I0010页

作者： Wei-Ting Zeng Wei-Sheng Feng Xing Zhang Yuan Yao Bin-Bin Xu Shao-Liang Lin Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of EducationFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Amphiphilic asymmetric brush copolymers(AABCs)possess unique self-assembly behaviors owing to their asymmetric brush architecture and multiple functionalities of multicomponent side ***,the synthesis of AABCs presents challenges,which greatly limits the exploration of their self-assembly *** this work,we employed dissipative particle dynamics(DPD)simulations to investigate the self-assembly behaviors of AABCs in selective *** varying the copolymer concentration and structure,we conducted the self-assembly phase diagrams of AABCs,revealing complex morphologies such as channelized micelles with one or more solvophilic ***,the number,surface area,and one-dimensional density distribution of the channelized micelles were calculated to demonstrate the internal structure and morphological transformation during the self-assembly *** findings indicate that the morphology of the internal solvophilic channels is greatly influenced by the copolymer structure,concentration,and interaction parameters between the different side *** simulation results are consistent with available experimental observations,which can offer theoretical insights into the self-assembly of AABCs.

关键词： Dissipative particle dynamics Brush copolymer Self-assembly Channelized micelle

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A novel high-efficient P/N/Si-containing APP-based flame retardant with a silane coupling agent in its molecular structure for epoxy resin

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Chinese Journal of Chemical engineering 2023年第3期55卷 137-147页

作者： Qiang Sun Jinlei Wang Xue Meng Jie Zhang Hong Yan College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Interface Science and Engineering in Advanced Materials(Taiyuan University of Technology) Ministry of EducationTaiyuan 030024China

A flame retardant containing multiple antiflaming elements usually exhibits high-efficient flame retardancy. Here, a novel P/N/Si-containing ammonium polyphosphate derivative(APTES-APP) is synthesized from ammonium polyphosphate(APP) and silane coupling agent(3-aminopropyl)triethoxysilane(APTES)via cation exchange, which is quite different in the chemical structure from APTES-modified APP for retaining silicon hydroxyls. APTES-APP is highly efficient for the epoxy resin. 8%(mass) APTES-APP imparts excellent flame retardancy to the epoxy resin, with a V-0 rating at the UL-94 test(1.6 mm)and an LOI value of 26%(vol). The peak heat release rate and total smoke production of the flameretardant epoxy resin are decreased by 68.1% and 31.3%, respectively. The synergy of P/N/Si contributes to the well-expanded char residue with a strong and dense surface layer, which is a very good barrier against heat and mass transfer. Besides, there is no significant deterioration in the mechanical properties of flame-retardant epoxy resin thanks to silicon hydroxyls forming hydrogen bonds with epoxy molecules. Meanwhile, other molecules can be grafted onto APTES-APP via these silicon hydroxyls, if ***, this work has developed a new strategy for amino silane as flame retardants. In conjunction with a low-cost and simple preparation method, APTES-APP has a promising prospect in the high-performance flame-retardant epoxy.

关键词： Ammonium polyphosphate Silane coupling agent All-in-one system Flame retardancy Epoxy resin

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A multi-functional MgF_(2)/polydopamine/hyaluronan-astaxanthin coating on the biodegradable ZE21B alloy with better corrosion resistance and biocompatibility for cardiovascular application

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Journal of Magnesium and Alloys 2024年第3期12卷 1102-1116页

作者： Yachen Hou Xueqi Zhang Jingan Li Liguo Wang Shaokang Guan School of Materials Science and Engineering and Henan Key Laboratory of Advanced Magnesium Alloy and Key Laboratory of Materials Processing and Mold Technology(Ministry of Education) Zhengzhou UniversityZhengzhou 450001China

The cardiovascular diseases(CVD)continue to be the major threat to global public health over the years,while one of the effective methods to treat CVD is stent *** magnesium(Mg)alloys have great potential applications in cardiovascular stents benefit from their excellent biodegradability and ***,excessive degradation rate and the delayed surface endothelialization still limit their further *** this study,we modified a Mg-Zn-Y-Nd alloy(ZE21B)by preparing MgF_(2) as the corrosion resistance layer,the dopamine polymer film(PDA)as the bonding layer,and hyaluronic acid(HA)loaded astaxanthin(ASTA)as an important layer to directing the cardiovascular cells *** electrochemical test results showed that the MgF_(2)/PDA/HA-ASTA coating improved the corrosion resistance of *** cytocompatibility experiments also demonstrated that this novel composite coating also selectively promoted endothelial cells proliferation,inhibited hyperproliferation of smooth muscle cells and adhesion of *** with the HAloaded rapamycin(RAPA)coating,our MgF_(2)/PDA/HA-ASTA coating showed better blood compatibility and cytocompatibility,indicating stronger multi-functions for the ZE21B alloy on cardiovascular application.

关键词： Biodegradable ZE21B alloy Reendothelialization Surface modification Hyaluronic acid Astaxanthin.

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Lightweight and large-scale rGO reinforced SiBCN aerogels with hierarchical cellular structures exposed to high-temperature environments

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Journal of materials science & Technology 2024年第12期179卷 145-154页

作者： Huijie Wang Zhiwei Chen Dong Su Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300350China

SiBCN ceramic aerogel is an ideal potential candidate for ultra-high temperature thermal insulation due to its unique microscopic pore structure combined with the excellent thermal stability of SiBCN ***,reduced graphene oxide(rGO)modified SiBCN aerogels(rGO/SiBCN)were prepared through solvothermal,freeze-casting and pyrolysis,and the dimension of the aerogel is up toΦ130 mm×28 *** density of the rGO/SiBCN aerogel is as low as 0.024 g/cm^(3) and the microstructural regulation is achieved by controlling the rGO content in the *** hierarchical cellular structure endows the aerogel with a high specific surface area(148.6 m^(2)/g)and low thermal conductivity(0.057 W m^(-1) K^(-1)).The 10 mm-thick sample exhibits excellent thermal insulation and ablation resistance,as evidenced by its ability to reduce the temperature from~1100℃to~180℃under the intense heat of a butane ***,benefiting from the ultrahigh-temperature stability of SiBCN,the rGO/SiBCN aerogel exhibits good thermal stability up to 1200℃in argon and short-oxidation resistance at 800℃in ***-fore,the rGO/SiBCN aerogel with superior overall performance could expand its practical application in high-temperature thermal insulation under extreme environments.

关键词： rGO/SiBCN Lightweight Large size Hierarchical cellular structure Thermal insulation

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