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Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and diffusion for dendrite-free Zn metal batteries

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Journal of Energy Chemistry 2025年第1期100卷 693-701页

作者： Haifeng Yang Jian Wang Panpan Zhang Xiaomin Cheng Qinghua Guan Jing Dong Bixian Chen Lujie Jia Jing Zhang Yongzheng Zhang Yunjian Liu Hongzhen Lin School of materials Science and Engineering Jiangsu University i-lab & CAS Key laboratory of Nanophotonic materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Helmholtz Institute Ulm (HIU) Karlsruhe Institute of Technology (KIT) School of materials Science and Engineering Xi'an University of Technology State Key laboratory of Chemical Engineering East China University of Science and Technology

Rechargeable aqueous zinc-metal batteries （AZMBs） are promising candidates for large-scale energy storage systems due to their low cost and high ***,their performance and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water molecules tightly participate in the Zn（H2O）62+solvation ***,learnt from self-generated solid electrolyte interphase （SEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on metallic Zn surface （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite formation,achieving uniform Zn plating/stripping behavior,as confirmed by electronic/optical microscopies and interface spectroscopical measurements together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility （99.54%） even under high current density and depth of discharge ***,the assembled ZNB@Zn-based full cell displays high capacity-retention rate of 80.21%after 3000 cycles at 5 A g-1and outstanding rate performance up to 10 A *** large-areal pouch cell is stabilized for hundreds of cycles,highlighting the bright prospects of the dielectric but ion-conductive layer in further application of AZMBs.

关键词： Zn metal battery Dielectric artificial layer Rapid ion diffusion Zincophilic diffusion Active water inhibition

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Epsilon-near-zero or mu-near-zero materials composed of dielectric photonic crystals

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Science China(Information Sciences) 2013年第12期56卷 148-157页

作者： LUO Jie LAI Yun Wave-functional materials lab Department of Physics Soochow University

We theoretically demonstrate that at certain frequencies two-dimensional dielectric photonic crystals(PCs)may be regarded as either epsilon-near-zero or mu-near-zero *** show that the transmission through a slab of such materials upon normal incidence is normally non-unity and decays with slab ***,when the incident angle increases slightly,the transmittance experiences a dramatic increase due to the Brewster *** combination of the tunneling and resonance efects makes such materials good candidates for almost perfect bending waveguides and cloaking in *** zero index also enables applications of focusing and directive *** last,the distinction between the single-zero and double-zero media is *** all of the above results,the numerical simulations perfectly match with theoretical predictions from the efective medium analysis.

关键词： photonic crystal epsilon-near-zero material mu-near-zero material efective medium transmission properties Brewster efect

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Highly sensitive room-temperature gas sensors based on hydrothermal synthesis of Cr_2O_3 hollow nanospheres

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Chinese Physics B 2009年第9期18卷 3985-3989页

作者：李盛李凤丽周少敏王鹏程轲杜祖亮 Key lab for Special functional materials of Ministry of Education Henan University

This paper reports that Cr2O3 hollow nanospheres （HNs） were synthesized via a hydrothermal approach and characterized by scanning electron microscopy, x-ray powder diffraction, transmission electron microscopy （TEM）, selective area electron diffraction and high resolution TEM, respectively. In addition, the room-temperature （RT） gas sensing properties of Cr2O3 HNs and conventional powders （CPs） were investigated by means of the surface photovoltage technique. The experimental data demonstrate that the RT gas sensor of the as-fabricated HNs reaches below 5 ppm whereas that of the CPs is about 40 ppm, which results from there being much more adsorbed and desorbed oxygen in HNs than in CPs at RT. The as-prepared Cr2O3 HNs could have potential applications as RT nanosensors.

关键词： Cr2O3 hollow nanospheres gas sensing surface photovoltage

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Structure and properties of nanocrystalline rare earth bulks prepared by spark plasma sintering

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Journal of Rare Earths 2009年第6期27卷 961-966页

作者：卢年端宋晓艳刘雪梅张久兴 College of materials Science and Engineering Key Lab of Advanced Functional MaterialsChinese Ministry of EducationBeijing University of Technology

A series of rare earth bulks with the ultrafine nanocrystalline structure were prepared by applying an 'oxygen-free'(an environmental oxygen concentration less than 0.5 ppm) in-situ synthesis system,where the inert-gas condensation was combined with the spark plasma sintering technology into an entirely closed *** thermal and mechanical properties of the prepared ultrafine nanocrystalline bulks were characterized and compared with those of the raw polycrystalline *** was found that the specific ...

关键词： spark plasma sintering ultrafine nanocrystalline bulk physical property rare earths

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TEM Study on the Formation Process of TiO_2 Nanotubes

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Chinese Chemical Letters 2003年第4期14卷 419-422页

作者： Jing Wei ZHANG Xin Yong GUO Zhen Sheng JIN Shun Li ZHANG Jing Fang ZHOU Zhi Jun ZHANG lab of Special functional materials Henan UniversityKaifeng 475001

The process, that the polycrystalline TiO2 powders were converted into TiO2 nanotubes, was observed with transmission electron microscope. The results obtained indicated that in concentrated NaOH aqueous solution, an... 详细信息

关键词： TiO2 nanotubes anisotropic swelling TEM.

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Synthesis and Crystal Structure of 2-(3,3'-Bithiophen-2,2'-yl)dibenzothiazole (BTDB) and 2-(Dithieno[2,3-b:3',2' -d]thiophen-2,5-yl)dibenzothiazole (DTTDB)

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Chinese Journal of Structural Chemistry 2013年第6期32卷 877-884页

作者：李春丽杨娟娟史建武王华 Key lab for Special functional materials of Ministry of Education Henan University

The title compounds, 2-（3,3＇-bithiophen-2,2＇-yl）dibenzothiazole （BTDB） and 2-（dithieno[2,3-b：3＇,2＇-d]thiophen-2,5-yl）dibenzothiazole （DTTDB）, have been synthesized and characterized by FT-IR, NMR, MS, HRMS and X-ray single-crystal diffraction. The crystal of BTDB crystallizes in triclinic, space group P1 with a = 9.2207（17）, b = 10.453（2）, c = 10.969（2） A, V= 981.2（3） A3 and Z = 2. Crystal data of DTTDB： orthorhombic system, space group Pbcn with a = 4.5290（8）, b = 13.576（3）, c = 32.033（6） A, V= 1969.6（6） A3 and Z = 4.

关键词： synthesis crystal structure 2-(3,3'-bithiophen-2,2'-yl)dibenzothiazole 2-(dithieno [2,3-b:3',2'-d] thiophen-2,5-yl)dihenzothiazole

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Recent progress on eco-friendly quantum dots for bioimaging and diagnostics

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Nano Research 2024年第12期17卷 10309-10331页

作者： Yanbing Lv Lifang Zhang Ruili Wu Lin Song Li Key lab for Special functional materials of the Ministry of Education and School of Nanoscience and Materials EngineeringHenan UniversityKaifeng 475004China

Semiconductor quantum dots(QDs),as promising fluorescent materials,have been widely applied in biomedical application due to their unique optical ***,the most intensively studied are Cd-containing QDs(Cd-based QDs),whose potential toxicity prevents their further *** recent years,the eco-friendly QDs with low toxicity and environmental friendliness have begun to be developed,showing great potential in biomedical *** high-quality synthesis of eco-friendly QDs and the appropriate surface modification are key to realize their *** review summarizes the progress of eco-friendly QDs for biomedical applications,including their designed preparation,optical properties,surface modification,toxicity,and their applications in bioimaging and ***,the challenges of eco-friendly QDs for future bioimaging and diagnostics application were *** believe this review will provide important guidance for promoting the development of eco-friendly QDs in bioimaging and diagnostics.

关键词： eco-friendly quantum dots(QDs) environmental friendliness surface modification bioimaging diagnostics

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A mechanical reinforced and antifreezing polyacrylate hydrogel electrolyte for high-performance zinc-ion batteries

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Nano Research 2025年第1期18卷 341-350页

作者： Zili Zhang Ruolin Wang Hongfei Lu Di Zhang Yu Zhao Jing Xu Bin Sun Zhi-Min Dang Yang Jin School of Electrical and Information Engineering Zheng Zhou UniversityZhengzhou 450001China State Key lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

The operation of aqueous zinc-ion batteries in flexible energy storage field is plagued by the uncontrollable growth of Zn-dendrite and inevitable freeze of water below 0 ℃.Therefore,it is necessary to design a hydrogel electrolyte with good mechanical property and freezing resistance to uniform the Zn-deposition and resist flexibility loss at low *** find that the mechanical property(strength and toughness)of hydrogel electrolyte has a significant impact on the suppression of dendrite growth and the uniform deposition of zinc ***,a polyacrylate hydrogel is prepared in one step by ultraviolet(UV)curing method with Zn(CF_(3)SO_(3))_(2)salt and polyvinyl alcohol(PVA)addition to increase the antifreezing ability and mechanical *** adsorption of water molecules by 2-hydroxyethyl acrylate(HEA)and PVA reduces the freezing point of the hydrogel,which is beneficial for enhancing the electrochemical stability at low *** this basis,the Zn-symmetrical battery with hydrogel electrolyte has a long lifespan of 4710 h at 0.5 mA·cm^(-2)and 0.5 mAh·cm^(-2)at room ***,the hydrogel electrolyte exhibits an outstanding stability at low temperature of^(-2)0 ℃,the lifespan of symmetrical battery reaches to 4000 h at 0.5 mA·cm^(-2)and 0.5 mAh·cm^(-2).The assembled full cell with NaV3O8·1.5H_(2)O(NVO)cathode and hydrogel electrolyte possesses a high capacity retention ratio of 77%after 10,000 cycles at^(-2)0 ℃.The flexible cell can power light-emitting diode(LED)lamp under bending,warping and cutting without liquid leakage and an electronic watch at the operating temperature of^(-2)0 ℃.

关键词： zinc ion battery hydrogel electrolyte mechanical enhancement freezing resistance

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Short-process recycling of Nd-Fe-B sintered magnet sludge wastes:Challenges and approaches

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Journal of Rare Earths 2023年第10期41卷 1467-1477,I0001页

作者： Liying Cong Lichao Yu Quangui Zhou Qingmei Lu Ming Yue Key lab of Advanced functional materials Ministry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing100124China

Nd-Fe-B sintered magnet sludge wastes are one kind of typical commodity of recyclable rare-earth permanent magnet resources,and recycling such kind of wastes with economical and environmentally friendly techniques is crucial to the sustainable rare-earth ***,the current multistage wet process recycling technique for the sludge wastes involves high fabrication cost,excessive energy consumption,and heavy environmental ***,short-process recycling techniques for Nd-Fe-B sintered magnet wastes have drawn increasing attention in the past *** this paper,we review recent efforts into short-process recycling Nd-Fe-B sintered magnet sludge wastes with emphasis on in-situ recycling techniques.

关键词： Nd-Fe-B sintered Magnet sludge wastes Rare earths Short-process recycling In-situ recycling

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A versatile solution-phase, precursor route to surface-mazelike hierarchical structures

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Science China Chemistry 2015年第4期58卷 620-626页

作者： Ji Ma Lianchao Han Kezheng Chen lab of functional and Biomedical Nanomaterials College of materials Science and Engineering Qingdao University of Science and Technology

In this work, surface-mazelike Zn O, Cu, and Ni hierarchical structures were synthesized via a versatile ethylene glycol- mediated solvothermal method. The structure evolution of these materials bore striking similarities, including(1) initial formation of metal alkoxides precursors and(2) subsequent structural evolution of products from tiered plates to jigsaw puzzles; then to extrusion ridges, nests and spindles; and thereafter to final mazelike structures driven by persistent thermal decomposition of preformed precursors. Based on their unique surface morphologies in sinuous asymmetry, it is anticipated that such mazelike hierarchical structures may shed new light on the development of morphology-controlled adsorption and heterogeneous catalysts.

关键词： hierarchical structure versatile precursor route mazelike solvothermal adsorption

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