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Hierarchical Fe_(x)Bi_(2−x)S_(3) solid solutions for boosted supercapacitor performance

Nano Research 2024年第5期17卷 3997-4005页

作者： Fengming Zhou Xiaodong Wang Ruijie Jing Xiaoyu Li Qi Zhang Zhenjiang Li Yunmei Du Zhenyu Xiao Lei Wang International Cooperation United Laboratory of Eco-chemical Engineering and Green Manufacturing College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Technology Innovation Center of Battery Safety and Energy Storage Technology QingdaoInternational Science and Technology Cooperation Base of QingdaoCollege of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

For the pursuit of high energy supercapacitors,the development of high performance pseudocapacitance or battery-type negative electrode material is urgently needed to make up for the capacity shortage of commercial electric double layer capacitor(EDLC)type materials.Herein,a porous and defect-rich Fe_(x)Bi_(2-x)S_(3) solid solution structure is firstly constructed by employing Fe-doped Bi_(2)O_(2)CO_(3) porous nanosheets as a precursor,which presents dramatically increased energy storage performance than Bi_(2)S_(3) and FeS_(2) phase.For the optimized Fe_(x)Bi_(2-x)S_(3) solid solution(FeBiS-60%),the Fe solute is free and random dispersed in Bi_(2)S_(3) framework,which can effectively modulate the electronic structure of Bi element and introduce rich-defect due to the existence of Fe(II).Meanwhile,the FeBiS-60%,constructed by pore nanosheets that are assembled by self-supported basic nanorod units,presents rich mesoporous channels for fast mass transfer and abundant active sites for promoting capacity performance.Therefore,a high capacitance of 832.8 F·g^(-1) at a current density of 1 A·g^(-1) is achieved by the FeBiS-60%electrode.Furthermore,a fabricated Ni3S_(2)@Co_(3)S_(4)(NCS)//FeBiS-60%hybrid supercapacitor device delivers an outstanding energy density of 85.33 Wh·kg^(-1) at the power density of 0.799 kW·kg^(-1),and ultra-long lifespan of remaining 86.7%initial capacitance after 8700 cycles.

关键词： supercapacitor solid solutions defect structure hierarchical structure Bi_(2)S_(3)

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Elastic Energy and Elastic Interaction Ordering of Binary solid solutions

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Journal of Materials Science & Technology 1996年第1期12卷 57-68页

作者： Ren, XB Wang, XT Shimizu, K Tadaki, T XIAN JIAOTONG UNIV COLL MAT SCI & ENGN XIAN 710049 PEOPLES R CHINA OSAKA UNIV INST SCI & IND RES IBARAKI OSAKA 567 JAPAN

A theory in the framework of continuum elasticity has been developed to calculate the total contribution of ''atomic size effect'' or ''strain energy effect'' to free energy of binary solid solutions. It is found that elastic free energy consists of two parts: elastic self energy (ESE), and elastic interaction energy(EIE). The former is a function of composition alone, the latter is also a function of atomic configuration. Minimization of total elastic free energy with respect to atomic arrangement results in an ordered arrangement of atoms, which is called elastic interaction ordering (EIO), as it originates from elastic interaction among atoms. EIO is a kind of local ordering within a ''characteristic range'', and it is found to be important in determining the state of solid solutions and structures of superlattices. The present theory also gives good explanation to the coexistence of ordering and decomposition which can not be understood in conventional theories.

关键词： solid solutions

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Effect of Elastic Energy due to Atomic Size Factor on Ordering and Decomposition Behaviour of Binary solid solutions

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Journal of Materials Science & Technology 1996年第2期12卷 135-142页

作者： Ren, XB Wang, XT Shimizu, K Tadaki, T XIAN JIAOTONG UNIV COLL MAT SCI & ENGNXIAN 710049PEOPLES R CHINA OSAKA UNIV INST SCI & IND RESIBARAKIOSAKA 567JAPAN

A theory recently developed by the present authors is applied to the study of the effect of elastic energy due to atomic size factor on the transformation behaviour of binary solid solutions. It is found that elastic interaction energy (EIE), which is a part of the total elastic energy, plays a key role in both ordering elastic interaction ordering (EIO) and spinodal decomposition. The present study gives a reasonable explanation to the historical dilemmas, ''elastic energy paradox'' and ''atomic size factor paradox''. By solving these confusing problems, the coexistence of ordering (EIO) and decomposition, which has been regarded as impossible by conventional theories, can be well understood. The mechanism is as follows: lowering of elastic energy demands EIO, and such an ordering provides a driving force for spinodal decomposition. Therefore, in alloys with large atomic size factor, spinodal decomposition is preceded and induced by ordering. Ordering and spinodal decomposition are thus closely related processes to each other.

关键词： solid solutions

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Synthesis and characterization of cadmium-calcium hydroxyapatite solid solutions

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International Journal of Minerals,Metallurgy and Materials 2014年第6期21卷 604-608页

作者： Xin Zhao Yi-nian Zhu Liu-qin Dai College of Light Industry and Food Engineering Guangxi University College of Environmental Science and Engineering Guilin University of Technology

A series of cadmium-calcium hydroxyapatite solid solutions was prepared by an aqueous precipitation method. By various means, the characterizations confirmed the formation of continuous solid solutions over all ranges of Cd/（Cd＋Ca） atomic ratio. In the results, both lattice parameters a and c display slight deviations from Vegard’s rule when the Cd/（Cd＋Ca） atomic ratio is greater than 0.6. The particles change from smaller acicular to larger hexagonal columnar crystals as the Cd/（Cd＋Ca） atomic ratio increases from 0-0.60 to 0.60-1.00. The area of the phosphate peak for symmetric P-O stretching decreases with the increase in Cd/（Cd＋Ca） atomic ratio, and the peak disappears when the Cd/（Cd＋Ca） atomic ratio is greater than 0.6; the two phosphate peaks of P-O stretching gradually merge together for the Cd/（Cd＋Ca） atomic ratio near 0.60. These variations can be explained by a slight tendency of larger Cd ions to occupy M（2） sites and smaller Ca ions to prefer M（1） sites in the structure.

关键词： hydroxyapatite solid solutions cadmium calcium substitution

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Evolution from Diffuse Ferroelectric to Relaxor Ferroelectric in Pb1-xBax（Fe1/2Nb1/2）O3 solid solutions

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Chinese Physics Letters 2014年第7期31卷 172-175页

作者：吕欣王楠陈湘明 Laboratory of Dielectric Materials Department of Materials Science and Engineering Zhejiang University Hangzhou 310027

Dielectric and ferroelectric characteristics for Pb1-xBax（Fe1/2Nh/2）O3 （x = 0,0.05,0.1,0.15, and 0.2） ceramics are determined together with their structures. X-ray diffraction （XRD） analysis confirms the solid solutions with the cubic structure. The dielectric nature changes from diffuse ferroelectric to relaxor ferroelectric with increasing x, while the phase transition temperature Tc （or Tm） decreases monotonously. The diffuse ferroelectric phase transition is observed in the solid solutions with 0≤x ≤0.05. For Pbl-xBax（Fe1/2Nb1/2）O3 with 0.1≤ x≤0.2, relaxor ferroelectric behavior is determined, and the Vogel-Fulcher equation is used to describe the relaxor behavior. The 1/ε versus T plots reveal the diffusion dielectric characteristics in both diffuse and relaxor ferroelectrics.

关键词： solid solutions

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Features of the Conductivity of the Ag₈Ge_1-xMn_xTe₆ solid solutions

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Journal of Materials Science and Chemical Engineering 2022年第5期10卷 16-28页

作者： Rashad Rahimov Aynur Gahramanova Durdana Arasly Almaz Halilova Ilgar Mammadov Institute of Physics of Azerbaijan National Academy of Sciences Baku Azerbaijan

Samples of Ag8Ge1-xMnxTe6 solid solutions with different manganese content (x = 0, 0.05, 0.1, 0.2) were prepared by fusing and further pressing their powders under the pressure of 0.6 GPa. In addition of Mn atoms to the Ag8GeTe6 compound leads to compression of their lattice. All p-type samples acquire a high resistance below the transition at temperatures of 180 - 220 K. The electrical conductivity of all compositions in the range of 220 - 300 K increases due to hopping mechanism, and at temperatures T > 320 K, a semiconductor characteristic is observed. By studying impedance spectra of samples, it was established that at 80 K solid solutions behave like a homogeneous dielectric material. At high temperatures and frequencies of an external electric field, a significant role of grain boundaries in conductivity was revealed. The dielectric anomaly occurring at low frequencies is also associated with an effect that manifests itself in the grain boundary.

关键词： solid solutions X-Ray Diffraction Hopping Conductivity Electrical Conductivity Impedance Spectra

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Dimensional t-factor variation and increase of stability of the ferroelectric state in(Na_(0.5)Bi_(0.5))TiO_(3)-based solid solutions

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Journal of Advanced Dielectrics 2017年第5期7卷 17-24页

作者： V.M.Ishchuk D.V.Kuzenko V.L.Sobolev Science&Technology Center`Reactivelectron'of the Ukrainian National Academy of Sciences Donetsk 83049 Ukraine Physics Department South Dakota School of Mines and TechnologyRapid City SD 57701USA

The influence of the B-site ion substitutions in(1-x)(Bi_(1/2)Na_(1/2))TiO_(3)–xBaTiO_(3)system of solid solutions on the relative stability of the antiferroelectric(AFE)and ferroelectric(FE)phases has been studied.The ions of zirconium,tin,and(In_(0.5)Nb_(0.5)),(Fe_(0.5)Nb_(0.5)),(Al_(0.5)V_(0.5))ion complexes have been used as substituting elements.An increase in the concentration of the substituting ion results in a near linear variation in the size of the crystal lattice cell.Along with the cell size variation,a change in the relative stability of the AFE and FE phases takes place according to the changes of the tolerance factor of the solid solution.An increase in the tolerance factor leads to the increase in the temperature of the FE–AFE phase transition,and vice versa.Obtained results indicate the way for raising the temperature of the FE–AFE phase transition in(Bi_(1/2)Na_(1/2))TiO_(3)-based solid solutions.

关键词： Lead-free piezoelectrics solid solutions ion substitutions phase transitions

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Peculiarities of the dependences of the dielectric properties of solid solutions of multicomponent systems on the electronegativity of their constituent cations

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Journal of Advanced Dielectrics 2022年第4期12卷 18-23页

作者： Andryushin Konstantin Dudkina Svetlana Shilkina Lidiya Sahoo Sushrisangita Moysa Maksim Andryushina Inna Verbenko Iliya Reznichenko Larisa Research Institute of Physics Southern Federal UniversityStachki str.194 Rostov-on-Don 344090Russia

solid solutions(SS)of 3-and 4-component systems based on lead titanate-zirconate were prepared by the method of solid-phase reactions and uniaxial hot pressing.The dependences of the relative permittivity of polarized samples on the electronegativity(EN)of their constituent cations have been studied.The ferro-hardness of the SS(the stability of the domain structure to external influences)is shown to be directly dependent on the EN of elements B in the corresponding oxidation states,i.e.,the degree of covalence of the B-O bond.The deviation from this dependence in SS with Ni and Cd is explained by their individual features,which result in changes in the degree of bond covalence in both cationic sublattices.The conducted crystal-chemical analysis made it possible to choose promising SS when creating ferroelectric materials,including textured piezoelectric ceramic materials for piezoelectric transducers for various purposes:Piezotransformers,piezoelectric motors,ultrasonic emitters,filter devices,ultrasonic flaw detectors,accelerometers,etc.

关键词： solid solutions multicomponent systems lead titanate-zirconate electronegativity dielectric properties

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Binary perovskite solid solutions and trends in their phase transitions temperatures variation

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Journal of Advanced Dielectrics 2022年第1期12卷 36-44页

作者： G.A.Geguzina I.G.Popova A.E.Panich Research Institute of Physics Southern Federal University No.194Stachki Ave.Rostov-on-Don344090Russia Department of Physics Don State Technical University No.1Gagarin sq.Rostov-on-Don344000Russia Institute of High Technology and Piezotechnics Southern Federal University No.10Milchakova str.Rostov-on-Don344090Russia

Some of the known binary ABO_(3)perovskites with ferro-(FE)or antiferroelectric(AFE)at T_(C)and different magnetic phase tran-sitions(PT):ferro-and antiferromagnetic at T_(N)and also some of their solid solutions are considered.Some correlations between their FE or AFE and/or magnetic PTs temperatures,on the one hand,and their interatomic bond A-O strains,on the other hand,have been constructed.It is shown that in the plotted diagrams these temperatures change with a change inδAO values as follows:classical FEs are followed by multiferroics,starting with BiFeO_(3)and ending with YVO_(3),followed by classical AFEs.At the same time,the temperatures T_(C)and T_(N)experience maxima at the corresponding points for BiFeO_(3),then quickly decrease,and the difference between them,T_(C)-T_(N),basically also decreases,slightly increasing along the way to the point EuTiO_(3).which made it possible to systematize these T_(C)and T_(N).

关键词： Perovskite structure binary oxides solid solutions ferroelectric phase transition magnetic phase transition phase transition temperature

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High sintering and dielectric performance:The improved(Mg,Zn)_(3)B_(2)O_(6) ceramics with the help of the DFT calculation

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镁合金学报(英文) 2023年第6期11卷 2142-2150页

作者： Rui Peng Yongcheng Lu Liang Shi Guoliang Yu Yuanming Lai Gang Wang Yuanxun Li Hua Su Huaiwu Zhang State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China China Jiliang University Hangzhou 310018China Chengdu University of Technology Chengdu 610059China

With the help of the first principle calculation,the solid-state reaction experiment was conducted to investigate the alteration in the sintering and the microwave dielectric properties of Mg_(3)B_(2)O_(6)ceramic with many Zn^(2+)substitutions.These properties were characterized using the scanning electron microscopy,network analyzer,X-ray diffraction,Raman spectroscopy,energy-dispersive spectroscopy,and thermomechanical and differential-thermal analyses.The coexistence of Mg_(3)B_(2)O_(6),Mg_(2)B_(2)O_(5)and ZnO ceramics could be observed with increasing Zn^(2+)addition,and the lattice distortion occurred in the Mg_(2)B_(2)O_(5)and Mg_(3)B_(2)O_(6)ceramics due to the substitution of Mg^(2+)with Zn^(2+).The electron density and the bond property of the MgO_(6)octahedron changed,and a quantitative method was used to discuss the variation in sintering,substitution and phase formation properties.The densification window was decreased to 1100℃,and the dielectric properties improved with the formation of a three-phase borate solid solution(dielectric constant=6.73,quality factor=112,000 GHz at 16 GHz(Q=7000),temperature coefficient of resonant frequency=-61.2 ppm℃^(-1),and relative density=97.0%).

关键词： DFT Borate solid solutions Dielectric properties

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