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Recent Progress and Prospects of layered Cathode materials for Potassium-ion Batteries

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Energy & Environmental materials 2021年第2期4卷 178-200页

作者： Jiaying Liao Yu Han Zhuangzhuang Zhang Jingyi Xu Jianbo Li Xiaosi Zhou Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China

layered materials with two-dimensional ion diffusion channels and fast kinetics are attractive as cathode materials for secondary batteries.However,one main challenge in potassium-ion batteries is the large ion size of K^(+),along with the strong K^(+)-K^(+)electrostatic repulsion.This strong interaction results in initial K deficiency,greater voltage slope,and lower specific capacity between set voltage ranges for layered transition metal oxides.In this review,a comprehensive review of the latest advancements in layered cathode materials for potassium-ion batteries is presented.Except for layered transition metal oxides,some polyanionic compounds,chalcogenides,and organic materials with the layered structure are introduced separately.Furthermore,summary and personal perspectives on future optimization and structural design of layered cathode materials are constructively discussed.We strongly appeal to the further exploration of layered polyanionic compounds and have demonstrated a series of novel layered structures including layered K_(3)V_(2)(PO_(4))_(3).

关键词： cathode layered material potassium-ion battery structural regulation

Recent advances in the electrochemistry of layered post-transition metal chalcogenide nanomaterials for hydrogen evolution reaction

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Journal of Energy Chemistry 2021年第9期30卷 451-479页

作者： Yong Wang Yang Zhao Xiang Ding Liang Qiao School of Physics University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina

layered two-dimensional(2 D)materials have received tremendous attention due to their unique physical and chemical properties when downsized to single or few layers.Several types of layered materials,especially transition metal dichalcogenides(TMDs)have been demonstrated to be good electrode materials due to their interesting physical and chemical properties.Apart from TMDs,post-transition metal chalcogenides(PTMCs)recently have emerged as a family of important semiconducting materials for electrochemical studies.PTMCs are layered materials which are composed of post-transition metals raging from main group IIIA to group VA(Ga,In,Ge,Sn,Sb and Bi)and group VI chalcogen atoms(S,selenium(Se)and tellurium(Te)).Although a large number of literatures have reviewed the electrochemical and electrocatalytic applications of TMDs,less attention has been focused on PTMCs.In this review,we focus our attention on PTMCs with the aim to provide a summary to describe their fundamental electrochemical properties and electrocatalytic activity towards hydrogen evolution reaction(HER).The characteristic chemical compositions and crystal structures of PTMCs are firstly discussed,which are different from TMDs.Then,inherent electrochemistry of PTMCs is discussed to unveil the well-defined redox behaviors of PTMCs,which could potentially affect their efficiency when applied as electrode materials.Following,we focus our attention on electrocatalytic activity of PTMCs towards HER including novel synthetic strategies developed for the optimization of their HER activity.This review ends with the perspectives for the future research direction in the field of PTMC based electrocatalysts.

关键词： Post-transition metal chalcogenide layered material Chemical composition Crystal structure Inherent electrochemistry Hydrogen evolution

Structural evolution and bandgap modulation of layeredβ-GeSe_(2)single crystal under high pressure

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Chinese Physics B 2022年第7期31卷 428-435页

作者：谢恒立王家祥王玲瑞闫勇郭娟高其龙晁明举梁二军任霄 Key Laboratory of materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China College of Physics and materials Science Henan Normal UniversityXinxiang 453007China

Germanium diselenide(GeSe_(2))is a promising candidate for electronic devices because of its unique crystal structure and optoelectronic properties.However,the evolution of lattice and electronic structure ofβ-GeSe_(2)at high pressure is still uncertain.Here we prepared high-qualityβ-GeSe_(2)single crystals by chemical vapor transfer(CVT)technique and performed systematic experimental studies on the evolution of lattice structure and bandgap ofβ-GeSe_(2)under pressure.High-precision high-pressure ultra low frequency(ULF)Raman scattering and synchrotron angle-dispersive x-ray diffraction(ADXRD)measurements support that no structural phase transition exists under high pressure up to 13.80 GPa,but the structure ofβ-GeSe_(2)turns into a disordered state near 6.91 GPa and gradually becomes amorphous forming an irreversibly amorphous crystal at 13.80 GPa.Two Raman modes keep softening abnormally upon pressure.The bandgap ofβ-GeSe_(2)reduced linearly from 2.59 eV to 1.65 eV under pressure with a detectable narrowing of 36.5%,and the sample under pressure performs the piezochromism phenomenon.The bandgap after decompression is smaller than that in the atmospheric pressure environment,which is caused by incomplete recrystallization.These results enrich the insight into the structural and optical properties ofβ-GeSe_(2)and demonstrate the potential of pressure in modulating the material properties of two-dimensional(2D)Ge-based binary material.

关键词： high pressure structural phase transition Raman spectroscopy scattering layered material

Tribological properties of novel palygorskite nanoplatelets used as oil-based lubricant additives

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Friction 2021年第2期9卷 332-343页

作者： Kunpeng WANG Huaichao WU Hongdong WANG Yuhong LIU Lv YANG Limei ZHAO School of Mechanical Engineering Guizhou UniversityGuiyang 550025China State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China

layered palygorskite(PAL),commonly called attapulgite,is a natural inorganic clay mineral composed of magnesium silicate.In this study,an aqueous miscible organic solvent treatment method is adopted to prepare molybdenum-dotted palygorskite(Amo-PMo)nanoplatelets,which greatly improved the specific surface area of PAL and the dispersion effect in an oil-based lubricant system.Their layered structure and size were confirmed using transmission electron microscopy(TEM)and atomic force microscopy.Following a tribological test lubricated with three additives(PAL,organic molybdenum(SN-Mo),and Amo-PMo),it was found that the sample of 0.5 wt%Amo-PMo exhibited the best tribological properties with a coefficient of friction of 0.09.Moreover,the resulting wear scar diameter and wear volume of the sliding ball surface were 63%and 49.6%of those lubricated with base oil,respectively.Its excellent lubricating performance and self-repairing ability were mainly attributed to the generated MoS2 adsorbed on the contact surfaces during the tribochemical reaction,thereby effectively preventing the direct collision between asperities on sliding solid surfaces.Thus,as-prepared Amo-PMo nanoplatelets show great potential as oil-based lubricant additives,and this study enriches the existing application of PAL in industry.

关键词： palygorskite(PAL) layered material lubricant additive wear tribofilm

Tuning the electric transport behavior of AgCrSe_(2) by intrinsic defects

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Science China Chemistry 2021年第11期64卷 1970-1975页

作者： Yang Hua Wei Bai Sheng Wang Yunbo Wu Shengtao Cui Zhe Sun Chong Xiao Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei230026China Institute of Energy Hefei Comprehensive National Science CenterHefei230031China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei230029China

The two-dimensional(2 D)structure often leads to unusual phenomena for the impact of confined mean free path of carrier scattering.As a quasi-2 D layered material,Ag CrSe_(2)has a liquid-like phonon behavior for its unstable Ag atoms at service temperature,leading to the promising candidate for thermoelectricity and fast ionic conductor.However,the inferior electronic performance constrains its application prospects as a functional semiconductor,which provides broad opportunity to tune its electric behaviors by defect chemistry.In this work,we revealed abundant electric transport behaviors of Ag CrSe_(2)with different types of intrinsic defects.For example,the Ag CrSe_(2)changes from Anderson insulator to metal when Se defects become prevailing and the magnetoresistance alters its sign depending on the relative ratio of Ag and Cr defects.Our results reported here can give salutary boosting on regulating the electric properties of ternary transition metal selenide by defect chemistry.

关键词： electric transport defect layered material

STATIONARY RANDOM WAVES PROPAGATION IN 3D VISCOELASTIC STRATIFIED SOLID

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Applied Mathematics and Mechanics(English Edition) 2005年第6期26卷 785-796页

作者：高强林家浩 State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology

Propagation of stationary random waves in viscoelastic stratified transverse isotropic materials is investigated. The solid was considered multi-layered and located above the bedrock, which was assumed to be much stiffer than the soil, and the power spectrum density of the stationary random excitation was given at the bedrock. The governing differential equations are derived in frequency and wave-number domains and only a set of ordinary differential equations ( ODEs) must be solved. The precise integration algorithm of two-point boundary value problem was applied to solve the ODEs. Thereafter, the recently developed pseudo-excitation method for structural random vibration is extended to the solution of the stratified solid responses.

关键词： layered material precise integration pseudo-excitation method wave propagation random vibration

Application of a Nanostructured Composite material Constructed by Self-Assembly of Titanoniobate Nanosheets and Cobalt Porphyrin to Electrocatalytic Reduction of Oxygen

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Chinese Journal of Chemistry 2016年第10期34卷 1021-1026页

作者： Jinpeng Li Xiaobo Zhang Binbin Pan Jiasheng Xu Lin Liu Juanjuan Ma Min Yang Zhenye Zhang Zhiwei Tong School of Chemical Engineering Huaihai Institute of Technology Lianyungang Jiangsu 222005 China School of Chemical Engineering and Technology China University of Mining and Technology Xuzhou Jiangsu 221116 China College of Chemistry and Chemical Engineering Lanzhou University Lanzhou Gansu 730000 China SORST Japan Science and Technology Agency (JST) Kawaguchi Center Building 4-1-8 Kawaguchi-shi Saitama 332-0012 Japan

A novel layered nanocomposite was fabricated by the self-assembly of TiNbOs-nanosheets and 5,10,15,20- tetrakis（N-methylpyridinium-4-yl）porphyrinatocobalt（III）（CoTMPyP）. The product was characterized by a variety of analytical techniques such as XRD, EDX, Zeta potential, AFM, UV-vis, IR and SEM, the guest species were intercalated into the interlayer gallery of KTiNbO5 successfully. The electrochemical property of TiNbO5-CoTMPyP as an electrode modifying material was examined by cyclic voltammetry test in PBS solution （pH = 7）, and the hybrid exhibited excellent electrocatalytical property towards oxygen reduction with the peak potential shifting from -0.703 V （bare GCE） to -0.278 V （modified electrode）. The result also indicated that the oxygen molecule was reduced to H2O2 by a two-electron process.

关键词： layered material metalloporpbyrin exfoliation self-assembly oxygen reduction

From Two-Dimensional Metal Organic Coordination Networks to Near-Infrared Luminescent PbS Nanoparticle/layered Polymer Composite materials

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Nano Research 2008年第3期1卷 195-202页

作者： Fang Cui Junhu Zhang Tieyu Cui Sen Liang Bao Li Quan Lin Bai Yang State Key Lab of Supramolecular Structure and materials College of ChemistryJilin UniversityChangchun 130012China Shenyang National Laboratory for materials Science Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

Two-dimensional(2-D)layered metal-organic coordination(lead methacrylate(LDMA))networks have been prepared in aqueous solution under mild conditions and their structure determined by single crystal diffraction.As the ligand used in our experiments is easily polymerized,these metal-organic coordination layers are therefore employed as precursors to fabricate cross-linked polymer layered materials throughγ-irradiated polymerization.The stabilities of the samples are signifi cantly improved afterγ-irradiation.To our knowledge,this is the fi rst time that covalent bonded polymer layered structures have been fabricated without the assistance of added surfactant or template.Such layered polymer materials cannot only act as alternatives to layered inorganic materials in some caustic environments,but also allow the generation of PbS nanoparticles(NPs)without aggregation in the polymer matrix.By exposing the polymer layer to H2S gas at room temperature,uniform PbS nanoparticles with an average size of about 6 nm are generated in situ.In addition,the resulting PbS NPs exhibit near-infrared(NIR)luminescent properties,which suggests the composite materials may be useful as active optical elements at communication wavelengths from 1300 to 1550 nm.

关键词： PbS nanoparticles layered material near-infrared γ-irradiated polymerization in situ

Can Reflection Coefficient Be Greater Than Unity?

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Can Reflection Coefficient Be Greater Than Unity?