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Recent advances and key opportunities on in-plane micro-supercapacitors:From functional microdevices to smart integrated microsystems

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Journal of Energy Chemistry 2023年第6期81卷 410-431,I0010页

作者： Jieqiong Qin Hongtao Zhang Zhi Yang Xiao Wang Pratteek Das Feng Zhou Zhong-Shuai Wu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina College of Science Henan Agricultural UniversityZhengzhou 450002HenanChina Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023LiaoningChina

The popularization of portable,implantable and wearable microelectronics has greatly stimulated the rapid development of high-power planar micro-supercapacitors(PMSCs).Particularly,the introduction of new functionalities(e.g.,high voltage,flexibility,stretchability,self-healing,electrochromism and photo/thermal response)to PMSCs is essential for building multifunctional PMSCs and their smart selfpowered integrated microsystems.In this review,we summarized the latest advances in PMSCs from various functional microdevices to their smart integrated microsystems.Primarily,the functionalities of PMSCs are characterized by three major factors to emphasize their electrochemical behavior and unique scope of application.These include but are not limited to high-voltage outputs(realized through asymmetric configuration,novel electrolyte and modular integration),mechanical resilience that includes various feats of flexibility or stretchability,and response to stimuli(self-healing,electrochromic,photo-responsive,or thermal-responsive properties).Furthermore,three representative integrated microsystems including energy harvester-PMSC,PMSC-energy consumption,and all-in-one selfpowered microsystems are elaborately overviewed to understand the emerging intelligent interaction models.Finally,the key perspectives,challenges and opportunities of PMSCs for powering smart microelectronics are proposed in brief.

关键词： Micro-supercapacitors in-plane Functionalization Integrated microsystem Energy storage

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The in-plane Orientation and Thermal Mechanical Properties of the Chemically Imidized Polyimide Films

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Chinese Journal of Polymer Science 2019年第3期37卷 268-278页

作者： Zhen-He Wang Xing Chen Hai-Xia Yang Jiang Zhao Shi-Yong Yang Laboratory of Advanced Polymer Materials Institute of Chemistry Chinese Academy of Sciences University of Chinese Academy of Science State Key Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences Department of Polymer Science The University of Akron

The thermal and mechanical properties of the chemically imidized polyimide(CIPI) films and thermally imidized polyimide(TIPI) films were investigated systematically. Experimental results indicated that the CIPI films show dramatically enhanced tensile strength and modulus with obviously reduced coefficient of thermal expansion(CTE) in comparison with TIPI films. These enhancements results from the high in-plane orientation and close packing of the CIPI backbones. Compared with thermal imidization which starts at about 140 °C, the chemical imidization activated by acetic anhydride and isoquinoline initiates the cyclization even at room temperature.The resulting imide rings restrict the mobility of polymer chains and lead to the in-plane orientation with solvent evaporation.Additionally, fewer small molecules remain in the films after treated at 120 °C by chemical imidization than by thermal imidization. The polymer chain plasticization caused by the evaporation of small molecules at high temperature is obviously restricted. Moreover, the partially imidized polymer inhibits the decomposition of mainchains that occurs at subsequent high temperature process, being beneficial to the formation of high molecular weight PI films. Hence, chemical imidization pathway shows apparent advantage to produce PI films with great combined properties, including high modulus, strength and toughness, as well as high thermal dimension stability etc.

关键词： Polyimide film Chemical imidization Thermal imidization in-plane orientation CTE

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Dynamic in-plane transversal normal stresses in the concrete face of CFRD

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Frontiers of Structural and Civil Engineering 2019年第1期13卷 135-148页

作者： Neftali SARMIENTO-SOLANO Miguel P.ROMO Institute of Engineering National University of MexicoMexico City04510Mexico

Severe earthquakes can induce damages to Concrete Face Rocldill Dams (CFRDs)such as concrete cracking and joint's water stops distressing where high in-plane transversal normal stresses develop.Although these damages rarely jeopardize the dam safety,they cause large water reservoir leakages that hinder the dam functioning.This issue can be addressed using well know numerical methods;however,given the wide range of parameters involved,it would seem appropriate to develop a simple yet reliable procedure to get a close understanding how their interaction affects the CFRD's overall behavior.Accordingly,once the physics of the problem is better understood one can proceed to perform a detailed design of the various components of the dam.To this end an easy-to-use procedure that accounts for the dam height effects,valley narrowness,valley slopes,width of concrete slabs and seismic excitation characteristics was developed.The procedure is the dynamic complement of a method recently developed to evaluate in-plane transversal normal stresses in the concrete face of CFRD's due to dam reservoir filling [1].Using these two procedures in a sequential manner,it is possible to define the concrete slab in-plane normal stresses induced by the reservoir filling and the action of orthogonal horizontal seismic excitations acting at the same time upstream-downstream and cross river.Both procedures were developed from a data base generated using nonlinear static and dynamic three-dimensional numerical analyses on the same group of CFRD's.Then,the results were interpreted with the Buckingham Pi theorem and various relationships were developed.In the above reference,the method to evaluate the concrete face in-plane transversal normal stresses caused by the first reservoir filling was reported.In this paper,the seismic procedure is first developed and then through an example the whole method (dam construction,reservoir filling plus seismic loading)of analysis is assessed.

关键词： CFR dams dynamic analysis in-plane normal stresses concrete face

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Out-of-plane and in-plane piezoelectric behaviors of [Ba(Zr0.2Ti0.8)O3]–0.5(Ba0.7Ca0.3TiO3) thin films

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Progress in Natural Science:Materials International 2017年第6期27卷 664-668页

作者： Zhi Tao Fei Che Yemei Han Fang Wang Zhengchun Yang Wen Qi Ying Wu Kailiang Zhang School of Electronic and Information Engineering Tianjin Key Laboratory of Film Electronic & Communication Devices Tianjin University of Technology Beijing Key Laboratory of Energy Nanomaterials Advance Technology & Materials Co Ltd. China Iron & Steel Research Institute Group

The piezoelectric properties of [Ba(Zr;Ti;)O;]–0.5(Ba;Ca;TiO;)（abbreviated as BZT-0.5BCT） thin films deposited on Pt/Ti/SiO;/Si substrates are reported in the present investigation. The effect of the distances between the target and substrate（d） on the morphology and out-of-plane piezoelectric properties was investigated.The experimental results showed that the ferroelectric domains size was dependent on the distance between the substrate and target and the ferroelectric domain growth was constrained by the grains. The samples exhibited well-defined out-of-plane butterfly loops and hysteresis loops and the one with d of 6.5 cm possessed the optimal ferroelectric properties and it exhibited good in-plane piezoelectric properties.

关键词： Piezoelectrics BZT-BCT Ferroelectric domains Out-of-plane in-plane

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The Failure Mechanisms of Ultra-high Molecular Weight Polyethylene Fibre Composites Under in-plane Compression

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Journal of Wuhan University of Technology(Materials Science) 2020年第1期35卷 240-247页

作者：刘国亮张玉武 College of Textile and Clothing Yancheng Institute of TechnologyYancheng 224051China Faculty of Engineering University of NottinghamNottingham NG72RDUnited Kingdom College of Liberal Arts and Sciences National Unversity of Defense TechnologyChangsha 410073China

The in-plane compressive characteristics of the ultra-high molecular weight polyethylene(UHMWPE)fibre(Dyneema█)reinforced composites,both in 0/90°and±45°fibre orientations with respect to the loading direction,have been investigated.The composite made from unidirectional high modulus fibres(volume fraction 83%)and low strength polyurethane matrix(volume fraction 17%)is layered in an orthogonally alternating manner.The different failure mechanisms for the composites with 0/90°and±45°fibre orientations have been detected with the methods of experimental measurement,SEM observation and theoretical analysis.The composites specimens of 0/90°fibre orientation failed with macro-buckling of the high-modulus UHMWEP fibre layers with the matrix damage,whereas the specimens of±45°fibre orientation failed with the shearing of the soft matrix.Hence,the composite specimens in 0/90°fibre orientation had higher stiffness as well as compressive strength than those in±45°fibre orientation.The failure criteria of the composites under in-plane compression was employed to characterize the failure mechanism.Compared with the traditional thermoset matrix,the soft thermoplastic matrix leads to lower strength and higher failure strain of fibre reinforced composites under in-plane compression.In addition,the composite specimens cut by waterjet machine exhibited higher stress levels than those cut by bandsaw that introduced more initial imperfections with the temperature rising and tensile shocking.The comparison between the methodologies for cutting the tough composites can provide a valuable suggestion to obtain required composite structures without reducing the mechanical properties.

关键词： UHMWPE fibre composites in-plane compression failure mechanisms fibre buckling matrix shearing

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Tunable in-plane Anisotropy in Amorphous Sm Co Films Grown on(011)-Oriented Single-Crystal Substrates

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Engineering 2020年第2期6卷 159-164页

作者： Wenhui Liang Houbo Zhou Jiefu Xiong Fengxia Hu Jia Li Jian Zhang Jing Wang Jirong Sun Baogen Shen Beijing National Laboratory for Condensed Matter Physics and State Key Laboratory of Magnetism Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Fujian Institute of Innovation Chinese Academy of SciencesFuzhou 350108China

Amorphous Sm-Co films with uniaxial in-plane anisotropy have great potential for application in information-storage media and spintronic materials.The most effective method to produce uniaxial inplane anisotropy is to apply an in-plane magnetic field during deposition.However,this method inevitably requires more complex equipment.Here,we report a new way to produce uniaxial in-plane anisotropy by growing amorphous Sm-Co films onto(011)-cut single-crystal substrates in the absence of an external magnetic field.The tunable anisotropy constant,kA,is demonstrated with variation in the lattice parameter of the substrates.A kA value as high as about 3.3×10^4J·m^-3 was obtained in the amorphous Sm-Co film grown on a LaAlO3(011)substrate.Detailed analysis indicated that the preferential seeding and growth of ferromagnetic(FM)domains caused by the anisotropic strain of the substrates,along with the formed Sm-Co,Co-Co directional pair ordering,exert a substantial effect.This work provides a new way to obtain in-plane anisotropy in amorphous Sm-Co films.

关键词： Amorphous Sm-Co films in-plane uniaxial anisotropy Sputtering

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Determination of the in-plane anisotropy field in hexagonal systems via rotational magnetization: Theoretical model and Monte Carlo simulations

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Science China(Physics,Mechanics & Astronomy) 2009年第7期52卷 978-986页

作者： WANG AiMin PANG Hua Institute of Applied Magnetics Key Laboratory for Magnetism and Magnetic Materials of the Ministry of EducationLanzhou UniversityLanzhou 730000China

The magnetic anisotropy field in thin films with in-plane uniaxial anisotropy can be deduced from the VSM magnetization curves measured in magnetic fields of constant magnitudes. This offers a new possibility of applying rotational magnetization curves to determine the firstand second-order anisotropy constant in these films. In this paper we report a theoretical derivation of rotational magnetization curve in hexagonal crystal system with easy-plane anisotropy based on the principle of the minimum total energy. This model is applied to calculate and analyze the rotational magnetization process for magnetic spherical particles with hexagonal easy-plane anisotropy when rotating the external magnetic field in the basal plane. The theoretical calculations are consistent with Monte Carlo simulation results. It is found that to well reproduce experimental curves, the effect of coercive force on the magnetization reversal process should be fully considered when the intensity of the external field is much weaker than that of the anisotropy field. Our research proves that the rotational magnetization curve from VSM measurement provides an effective access to analyze the in-plane anisotropy constant K3 in hexagonal compounds, and the suitable experimental condition to measure K3 is met when the ratio of the magnitude of the external field to that of the anisotropy field is around 0.2.

关键词： rotational magnetization curve magnetocrystalline anisotropy in-plane anisotropy constant K3

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Variation of Out-of-plane Constraint and Its Effects on Fracture

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上海交通大学学报 2004年第Z2期38卷 212-216页

作者： Fei Xu Yulong Li Wanlin Guo Department of Mechanical Engineering Tokyo University of Science Noda2788510 Japan School of Aeronautics Northwestern Polytechnical University Xi''an710072 P. R. China School of Aeronautics Northwestern Polytechnical University Xi''an710072 P. R. China School of Aeronautics and Astronauts Nanjing University of Aeronautics and AstronautsNaniing210016 P.R.China

The limitations of using one-parameter to describe the crack-tip fields have prompted investigators to consider better descriptions of the crack tip fields. The two-parameter descriptions, such as J-Q theory, have been an important development in this field. But under the consideration of plane strain and three-dimensional problem, the effects of the out-of-plane stress can not be neglected In this paper, effects of the in-plane constraint as well as the out-of-plane constraint are studied by aid of the finite element method on the plane strain condition. It is obvious that both the in-plane constraint (Q factor) and the out-of-plane constraint (Tz = σzz/(σxx + σyy) ) affect the crack tip fields.Several important features of the out-of-plane constraint are described out based on the simulation results. At the end of this paper, a three-parameter formulation is proposed, in which both the in-plane constraint and the out-of-plane constraint are considered. Comparing with the results of the FEM numerical simulation, the three-parameter description can provide a better prediction near the crack tip.

关键词： in-plane constraint out-of-plane constraint three-parameter formulation crack tip field elastic-plastic

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Effects of Cell Microtopology on the in-plane Dynamic Crushing Analysis of Re-entrant Square Cellular Material

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Automotive Innovation 2018年第1期1卷 24-34页

作者： Fangwu Ma Ying Zhao Hongyu Liang Jiawei Wang State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025China Department of Mechanical Engineering University of MichiganAnn ArborMI 48109-2102USA

With the development of three-dimensional printing technologies, so-called cellular materials have achieved increasingattention due to outstanding properties. Unlike pure solid structures, properties of cellular materials are influenced by bothutilized material and cell microtopology. The present paper proposes a novel type of re-entrant square cellular material.To explore the relationship between microtopology and macrodynamic responses systematically, an explicit dynamic finiteelement simulation method is used. This work starts by constructing theoretical models of relative density employing atwo-dimensional unit cell. Then, the effects of geometric features and configurations on dynamic properties are explored,and simulations indicate that variations of geometric parameters strongly affect properties and that the staggered re-entrantsquares are more stable than the regular re-entrant squares. Subsequently, the effects of the impact velocity on dynamiccrushing behaviors are elaborated. On this basis, the relationship of unit mass energy absorption and geometric features isobtained by employing the response surface method. Furthermore, with targets of maximum unit mass energy absorption andminimum relative density, the optimal structural parameters are achieved by using non-dominated sorting genetic algorithm.The study provides a detailed introduction to dynamic behaviors of cellular materials and guidance to design new structureswith superior characteristics of energy absorption.

关键词： Re-entrant cellular material Dynamic crushing Microtopology in-plane Finite element analysis

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in-plane bistatic backward scattering from seabottom with randomly inhomogeneous sediment and rough interface

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Science China(Physics,Mechanics & Astronomy) 2004年第6期47卷 702-716页

作者： PENG Zhaohui1,,ZHOU Jixun1,& ZHANG Renhe1 2 2 1.Institute of Acoustics,Chinese Academy of Sciences,Beijing 100080,China 2.School of Mechanical Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA Institute of Acoustics Chinese Academy of Sciences Beijing 100080 China School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 United States

The in-plane bistatic backward scattering caused by seabottom with random inhomogeneities and rough interface is studied. This work combines the ray tube integral method of Ivakin et al. and the complex-ray/steepest descent method of Hines. For a given incident grazing angle, the theoretical expression can easily be used to calculate scattering strength for different backward scattering angles. (This is essential for modeling shallow water reverberation by the normal mode approach.) The model is tested against published scattering measurements. The frequency/angle dependence of backward scattering and effects of volume inhomogeneity parameters on backward scattering are also discussed.

关键词： in-plane bistatic backward scattering, inhomogeneous sediment, rough interface.

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