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Structural Evolution of Graphene Oxide and Its Thermal Stability During High Temperature Sintering

Journal of Wuhan University of technology(materials Science) 2022年第3期37卷 342-349页

作者： HU Lanxin WANG Aiyang WANG Weimin School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

The thermal reduction of graphene oxide(GO)was performed by a tube furnace at different temperatures,and its structure evolution was investigated in *** results showed that the oxygen-containing functional groups on the carbon plane surface of GO gradually decomposed as the temperature increase,and the reduced graphene oxide(rGO)powder was obtained at 800℃.Then,rGO powder was sintered under 30 MPa at 1800℃using spark plasma sintering(SPS)and hot-pressing(HP)to evaluate its structural stability at high *** defect densities of rGO were reduced after high-temperature *** edge flatness and sp^(2) hybrid carbon plane structure were reconstructed *** results demonstrate that the lamellar structure of rGO maintains the structural integrity during high-temperature sintering without obvious deterioration,which provides experimental and theoretical supports for GO reinforced ceramics.

关键词： graphene oxide ceramics structure evolution thermal stability sintering

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Nonflammable electrolyte with weak-solvation structure for stable NCM811 cathode under high temperature

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Journal of Energy Chemistry 2025年第5期104卷 111-117页

作者： Dawei Xu Chao Yang Ailing Yang Xiaowei Liu Meilong Wang Jin Han Tiefeng Liu Ya You State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina International School of Materials Science and Engineering School of Materials Science and MicroelectronicsWuhan University of TechnologyWuhan 430070HubeiChina College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310058ZhejiangChina Quzhou Institute of Power Battery and Grid Energy Storage Quzhou 324000ZhejiangChina

High-nickel cathode LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)could enable lithium-ion batteries(LIBs)with high energy ***,excessive decomposition of the electrolyte would happen in the high operating voltage *** addition,the utilization of flammable organic solvents would increase safety risks in the high temperature ***,an electrolyte consisting of flame-retardant solvents with lower highest occupied molecular orbital(HOMO)level and LiDFOB salt is proposed to address above two *** a result,a thin and robust cathode-electrolyte interface containing rich LiF and Li-B-O compounds is formed on the cathode to effectively suppress electrolyte decomposition in the high operating *** NCM811||Li cell paired with this designed electrolyte possesses a capacity retention of 72%after 300 cycles at 55℃.This work provides insights into developing electrolyte for stable high-nickel cathode operated in the high temperature.

关键词： Electrolyte engineering Weak solvation High temperature Safety High-nickel cathode

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Surface repair of wide-bandgap perovskites for high-performance all-perovskite tandem solar cells

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Journal of Energy Chemistry 2024年第6期93卷 64-70,I0003页

作者： Xiaojing Lv Weisheng Li Jin Zhang Yujie Yang Xuefei Jia Yitong Ji Qianqian Lin Wenchao Huang Tongle Bu Zhiwei Ren Canglang Yao Fuzhi Huang Yi-Bing Cheng Jinhui Tong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Key Lab of Artificial Micro-and Nano-Structures of Ministry of Education of China School of Physics and TechnologyWuhan UniversityWuhan 430072HubeiChina Department of Electrical and Electronic Engineering Photonics Research Institute(PRI)Research Institute for Intelligent Wearable Systems(iWEAR)The Hong Kong Polytechnic University999077Hong KongChina Laboratory of Advanced Materials Fudan UniversityShanghai 200438China Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200GuangdongChina

Wide-bandgap(WBG)perovskite solar cells(PSCs)play a fundamental role in perovskite-based tandem solar ***,the efficiency of WBG PSCs is limited by significant open-circuit voltage losses,which are primarily caused by surface *** this study,we present a novel method for modifying surfaces using the multifunctional S-ethylisothiourea hydrobromide(SEBr),which can passivate both Pb^(-1)and FA^(-1)terminated surfaces,Moreover,the SEBr upshifted the Fermi level at the perovskite interface,thereby promoting carrier *** proposed method was effective for both 1.67 and 1.77 eV WBG PSCs,achieving power conversion efficiencies(PCEs)of 22.47%and 19.90%,respectively,with V_(OC)values of 1.28 and 1.33 V,along with improved film and device *** this advancement,we were able to fabricate monolithic all-perovskite tandem solar cells with a champion PCE of 27.10%,This research offers valuable insights for passivating the surface trap states of WBG perovskite through rational multifunctional molecular engineering.

关键词： Wide-bandgap perovskite Surface defect Multifunctional molecule All-perovskite tandem solar cells

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Highly Efficient Broadband Achromatic Microlens Design Based on Low-Dispersion materials

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Engineering 2024年第7期38卷 194-200页

作者： Xueqian Wang Chuanbao Liu Feilou Wang Weijia Luo Chengdong Tao Yuxuan Hou Lijie Qiao Ji Zhou Jingbo Sun Yang Bai Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China School of Materials and Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Metalenses with achromatic performance offer a new opportunity for high-quality imaging with an ultracompact configuration;however,they suffer from complex fabrication processes and low focusing *** this study,we propose an efficient design method for achromatic microlenses on a wavelength scale using materials with low dispersion,an adequately designed convex surface,and a thickness profile *** taking into account the absolute chromatic aberration,relative focal length shift(FLS),and numerical aperture(NA),microlens with a certain focal length can be realized through our realized map of geometric ***,the designed achromatic microlenses with low-dispersion fused silica were fabricated using a focused ion beam,and precise surface profiles were *** fabricated microlenses exhibited a high average focusing efficiency of 65%at visible wavelengths of 410-680 nm and excellent achromatic capability via white light ***,the design exhibited the advantages of being polarization-insensitive and *** results demonstrate the effectiveness of our proposed achromatic microlens design approach,which expands the prospects of miniaturized optics such as virtual and augmented reality,ultracompact microscopes,and biological endoscopy.

关键词： Broadband achromatic focusing Metamaterials Low dispersion materials Visible wavelength Microlenses

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Ultra-bright near-infrared-IIb emitting Zn-doped Ag_(2)Te quantum dots for noninvasive monitoring of traumatic brain injury

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Nano Research 2023年第2期16卷 2719-2727页

作者： Yifei Zhou Biao Huang Shi-Hui Chen Shu-Lin Liu Mingxi Zhang Ran Cui College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Medicinal Chemical Biology Tianjin Key Laboratory of Biosensing and Molecular RecognitionResearch Centre for Analytical SciencesCollege of ChemistryNankai UniversityTianjin 300071China

The long-wavelength region of the near-infrared-IIb(NIR-IIb,1,500–1,700 nm)imaging window has become an ideal window for in vivo imaging due to the suppressed photon scattering and near-zero autofluorescence of biological ***,it is necessary to develop fluorescent probes with excellent fluorescence performance and stability for NIR-IIb fluorescence *** this work,zinc-doped silver telluride quantum dots(Zn:Ag_(2)Te QDs)with bright fluorescence in the NIR-IIb window were *** introduction of Zn dopants inhibited crystal defects and reduced non-radiative ***,the quantum yield and fluorescence lifetime of Zn:Ag_(2)Te QDs were significantly *** addition,Zn-doping increased the number of ligands on the surface of QDs,thus enhancing the colloidal stability of Zn:Ag_(2)Te ***,the PEGylated Zn:Ag_(2)Te QDs with high absolute quantum yield realized noninvasive imaging of cerebral vascular of mouse with high resolution able to distinguish blood capillary,which could be utilized to monitor the brain condition of mice after traumatic brain injury.

关键词： near-infrared-IIb(NIR-IIb)window silver telluride quantum dots fluorescence in vivo imaging

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Sulfide-Based Nickel-Plated Fabrics for Foldable Quasi-Solid-state Supercapacitors

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Energy & Environmental materials 2022年第3期5卷 883-891页

作者： Zhihao Wei Tao Liu Liuyang Zhang Jiaguo Yu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyLuoshi Road 122Wuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen ValleyFoshan 528200China

Smart wearable market is burgeoning,and flexible energy storage is crucial to cope with its *** commonly-used metal-based current collectors are heavy with limited *** carbon-based current collectors are expensive and ***,the poor interface between active material and current collector leads to unsatisfactory ***,these two issues are attempted to be solved by using cheap and lightweight polyester-based fabrics as well as in-situ growth.A deposited thin layer of nickel on the fabrics not only enhances the conductivity,but also serves as the sacrificial precursor for the growth of active ***,intimate contact is secured via chemical *** electrode with ternary(metalinorganic-organic)component shows excellent electrochemical ***,high areal capacity is realized(2.2 C cm^(-2)at 2 mA cm^(-2)),which is far superior to its rigid nickel-foam-based ***,an allsolid-state supercapacitor device was *** device provides an areal capacity of 2.03 C cm^(-2)at the current density of 2 mA cm^(-2).It realizes an energy density of 0.45 mWh cm^(-2)when the power density is 1.6 mW cm^(-2).This work offers a feasible and cost-efficient way for fabricating electrode materials with excellent performance for portable supercapacitors.

关键词： nickel-plated fabrics flexible supercapacitor quasi-solid-state in-situ growth intimate contact

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Unprecedented strong and reversible atomic orbital hybridization enables a highly stable Li-S battery

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国家科学评论（英文版） 2022年第7期9卷 109-119页

作者： Min Yan Wenda Dong Fu Liu Lihua Chen Tawfique Hasan Yu Li Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Cambridge Graphene Centre University of CambridgeCambridge CB3 OFAUK State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Laboratory of Inorganic Materials Chemistry(CMI) University of NamurNamur B-50000 Belgium

The shuttle effect and excessive volume change of the sulfur cathode severely impede the industrial implementation of Li-S *** is still highly challenging to find an efficient way to suppress the shuttle effect and volume ***,we report,for the first time,an innovative atomic orbital hybridization concept to construct the hierarchical hollow sandwiched sulfur nanospheres with double-polyaniline layers as the cathode material for large-scale high-performance Li-S *** hierarchically 3D,cross-linked and stable sulfur-polyaniline backbone with interconnected disulfide bonds provides a new type and strong intrinsic chemical confinement of sulfur owing to the atomic orbital hybridization of Li 2s,S 3p,C 2p and N ***,such atomic orbital hybridization of sulfur sandwiched in the double sulfur-polyaniline network is highly reversible during the discharge/charge process and can very efficiently suppress the shuttle effect and volume expansion,contributing to a very high capacity of 1142 mAh g-1 and an excellent stabilized capacity of 886 mAh g-1 at 0.2 C after 500 cycles with a suppressed volume expansion and an unprecedented electrode *** innovative atomic orbital hybridization concept can be extended to the preparation of other electrode materials to eliminate the shuttle effect and volume expansion in battery *** present work also provides a commercially viable and up-scalable cathode material based on this strong and highly reversible atomic orbital hybridation for large-scale high-performance Li-S batteries.

关键词： atomic orbital hybridization hierarachical hollow sandwiched sulfur nanosphere double sulfur–polyaniline networks lithium–sulfur batteries insitu vulcanization

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Recyclable High-performance Carbon Fiber Reinforced Epoxy Composites Based on Dithioacetal Covalent Adaptive Network

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Chinese Journal of Polymer Science 2024年第10期42卷 1514-1524,I0011页

作者： Gui-Lian Shi Ting-Cheng Li Dao-Hong Zhang Jun-Heng Zhang Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education&Hubei Key Laboratory of Catalysis and Materials Science Hubei R&D Center of Hyperbranched Polymers Synthesis and ApplicationsSouth-Central Minzu UniversityWuhan430074China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan430200China Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhan430062Chin

Recycling of carbon fiber reinforced composites is important for sustainable development and the circular *** the use of dynamic chemistry,developing high-strength recyclable CFRPs remains a major challenge due to the mutual exclusivity between the dynamic and mechanical properties of ***,we developed a high-strength recyclable epoxy resin(HREP)based on dynamic dithioacetal covalent adaptive network using diglycidyl ether bisphenol A(DGEBA),pentaerythritol tetra(3-mercapto-propionate)(PETMP),and vanillin epoxy resin(VEPR).At high temperatures,the exchange reaction of thermally activated dithioacetals accelerated the rearrangement of the network,giving it significant reprocessing ***,HREP exhibited excellent solvent resistance due to the increased cross-linking *** this high-strength recyclable epoxy resin as the matrix and carbon fiber modified with hyperbranched ionic liquids(HBP-AMIM+PF6-)as the reinforcing agent,high performance CFRPs were successfully *** tensile strength,interfacial shear strength(IFSS)and interlaminar shear strength(ILSS)of the optimized formulation(HREP20/CF-HBPPF6)were 1016.1,70.8 and 76.0 MPa,*** addition,the CFRPs demonstrated excellent solvent and acid/*** CFRPs could completely degrade within 24 h in DMSO at 140℃,and the recycled CF still maintained the same tensile strength and ILSS as the original after multiple degradation cycles.

关键词： Epoxy resin Hyperbranched ionic liquid Recycling Carbon fiber Composites

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Weakly solvating electrolyte enabling solvent-free co-intercalation for stable potassium-ion storage in graphite

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Nano Research 2025年第3期18卷 234-242页

作者： Chaojie Cheng Wencong Feng Feiyue Wang Jingke Ren Deyang Guan Wei Chen Jean-Jacques Gaumet Kai Fu Xiaobin Liao Wen Luo State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Xinjiang UniversityUrumqi 830017China Laboratoire de Chimie et Physique:Approche Multi-échelles des Milieux Complexes(LCP-A2MC)Institut Jean BarriolUniversitéde LorraineMetz 57070France

Ether electrolytes for potassium-ion batteries exhibit a broader electrochemical window and greater applicability,yet most of them are high-concentration electrolytes with elevated *** this study,we propose the use of a weakly solvating cyclic ether electrolyte with tetrahydropyran(THP)as the *** approach induces the formation of a thin and dense inorganic-rich solid electrolyte interphase(SEI)film,which is accompanied by a decrease in the activation energy of electrode interfacial reactions due to the weak ligand binding of THP with K^(+).Density functional theory(DFT)simulations also corroborate the hypothesis that K^(+)has a lower binding energy with *** potassium storage process,the phenomenon of solvent co-intercalation of graphite does not occur,which greatly reduces the destruction of the graphite structure and enables a superior electrochemical performance and enhanced cycling stability at a lower concentration(2 M).At a current density of 0.2 C(55.8 mA·g^(-1)),the battery can be stably cycled for 800 cycles(approximately 8 months)with a specific capacity of 171.8 mAh·g^(-1).This study provides a new ether-based electrolyte for potassium ion batteries and effectively reduces the electrolyte cost,which is expected to inspire further development of energy storage batteries.

关键词： weakly solvating electrolyte co-intercalation graphite potassium ion batteries

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Mechanical Properties of Boron Carbide/Reducedgraphene-oxide Composites Ceramics

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Journal of Wuhan University of technology(materials Science) 2022年第6期37卷 1087-1095页

作者： LIAO Xusheng GAO Li WANG Xin ZHANG Fan LIU Lisheng REN Lin School of Science Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Reduced graphene oxide(rGO)enhanced B_(4)C ceramics was prepared by SPS sintering,the enhancement effect of rGO on the microstructure and mechanical properties of composites was studied through experiments and numerical *** results show that the composite with 2wt%rGO has the best comprehensive mechanical *** with pure boron carbide,vickers hardness and bending strength are increased by 4.8%and 21.96%,*** fracture toughness is improved by 25.71%.The microstructure observation shows that the improvement of mechanical properties is mainly attributed to the pullout and bridge mechanism of rGO and the crack *** on the cohesive force finite element method,the dynamic crack growth process of composites was *** energy dissipation of B_(4)C/rGO multiphase ceramics during crack propagation was calculated and compared with that of pure boron carbide *** results show that the fracture energy dissipation can be effectively increased by adding graphene.

关键词： boron carbide matrix composites graphene oxide mechanical property cohesive finite element method

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