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A mild, configurable, flex.ble CoNi-LDH（v）/Zn battery based on H-vacancy-induced reversible Zn2+ intercalation

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journal of Energy Chemistry 2025年第1期100卷 498-508页

作者： x.nyue Cheng Dingsheng Wu hao Gao Qingqing Wang Pengfei Lv Sam S.Yoon Qufu Wei Key Laboratory of Eco-tex.iles Ministry of Education Jiangnan University School of Mechanical Engineering Korea University

Flex.ble Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flex.ble aqueous Zn-based batteries based on Co-Ni layered double hydrox.de （CoNi-LDH） as the cathode material is hampered by their poor cycling stability and the corrosiveness of alkaline ***,CoNi-LDH nanosheets enriched with H vacancies (CoNi-LDH（v）) were constructed on a flex.ble carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDH（v）@CC as the cathode ex.ibited highly reversible conversion reactions and stable operation in 3 M ZnSO4electrolyte （pH=4）.The battery delivered an ex.ellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant H vacancies served as active sites for the reversible intercalation of Zn2+and the ex.ravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an ex.ellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDH（v）@CC//Zn@CC battery was fabricated and was found to ex.ibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flex.ble battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** proposed engineering strategy contributes to the realization of tex.iles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery H vacancies Mild aqueous electrolyte Tailorable battery Wearable energy storage device

Advances in Graphene‑Based Electrode for Triboelectric Nanogenerator

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Nano-Micro Letters 2025年第1期17卷 378-403页

作者： Bin x.e Yuanhui Guo Yun Chen hao Zhang jiawei x.ao Maox.ang Hou Huilong Liu Li Ma x.n Chen Chingping Wong State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

With the continuous development of wearable electronics,wireless sensor networks and other micro-electronic devices,there is an increasingly urgent need for miniature,flex.ble and efficient nanopower generation *** nanogenerator(TENG)technology can convert small mechanical energy into electricity,which is ex.ected to address this *** the core component of TENG,the choice of electrode materials significantly affects its *** metal electrode materials often suffer from problems such as durability,which limits the further application of ***,as a novel electrode material,shows ex.ellent prospects for application in TENG owing to its unique structure and ex.ellent electrical *** review systematically summarizes the recent research progress and application prospects of TENGs based on graphene *** precision processing methods of graphene electrodes are introduced,and the applications of graphene electrode-based TENGs in various scenarios as well as the enhancement of graphene electrodes for TENG performance are *** addition,the future development of graphene electrode-based TENGs is also prospectively discussed,aiming to promote the continuous advancement of graphene electrode-based TENGs.

关键词： Triboelectric nanogenerator Precision processing Graphene electrode Self-powered sensor

Nonlinear Transient Response of Functionally Graded Material Sandwich Doubly Curved Shallow Shell Using New Displacement Field

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Acta Mechanica Solida Sinica 2018年第1期31卷 108-126页

作者： Z.N.Li Y.x.hao W.Zhang j.H.Zhang College of Mechanical Engineering Beijing Information Science and Technology University College of Mechanical Engineering Beijing University of Technology

In this paper, the nonlinear transient dynamic response of functionally graded material （FGM） sandwich doubly curved shell with homogenous isotropic material core and functionally graded face sheet is analyzed using a new displacement field on the basis of Reddy＇s third-order shear theory for the first time. The equivalent material properties for the FGM face sheet are assumed to obey the rule of simple power law function in the thickness direction. Based on Reddy＇s theory of higher shear deformation, a new displacement field is developed by introducing the secant function into transverse displacement. Four coupled nonlinear differential equations are obtained by applying Hamilton＇s principle and Galerkin method. It is assumed that the FGM sandwich doubly curved shell is subjected to step loading, air-blast loading, triangular loading, and sinusoidal loading, respectively. On the basis of double-precision variable- coefficient ordinary differential equation solver, a new program code in FORTRAN software is developed to solve the nonlinear transient dynamics of the system. The influences of core thickness, volume fraction, core-to-face sheet thickness ratio, width-to-thickness ratio and blast type on the transient response of the shell are discussed in detail through numerical simulation.

关键词： New displacement fields Functionally graded materials Sandwich doubly curvedshell Blast load Nonlinear transient response

NONLINEAR DYNAMICS OF A FGM PLATE WITH TWO CLAMPED OPPOSITE EDGES AND TWO FREE EDGES

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Acta Mechanica Solida Sinica 2014年第4期27卷 394-406页

作者： Y.x.hao W.Zhang j.Yang College of Mechanical Engineering Beijing Information Science and Technology University College of Mechanical Engineering Beijing University of Technology School of Aerospace Mechanical and Manufacturing Engineering RMIT University PO Box 71Bundoora VIC 3083 Australia

This paper deals with the nonlinear forced vibration of FGM rectangular plate with a boundary of two edges clamped opposite and the other two free. The plate is subjected to transversal and in-plane ex.itations. The present research treats the material properties of the FGM plates as temperature-dependent and graded continuously throughout the thickness direction, following the volume fraction of the constituent materials according to the power law. The temperature is assumed to be constant in the plane and varied only in the thickness direction of the plate. In the framework of geometrical nonlinearity the plate is modeled and the equations of motion are obtained on Hamilton＇s principle. With the help of Galerkin discretization, the nonlinear ordinary differential equations describing transverse vibration of the plate are proposed. By the numerical method, the nonlinear dynamical responses of the FGM plate with two clamped opposite and two free edges are analyzed.

关键词： functionally graded materials plate clamped bifurcation

Deciphering the role of ultra-low-loaded rhodium in NiFe-MIL-53 for superior ox.gen evolution reaction

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journal of Energy Chemistry 2025年第1期100卷 77-86页

作者： jinzhi jia jinhua Zhang Kailu Guo Lanyue Zhang Gening Du hao You junfeng Huang Mudong Tu Hua Li Yong Peng Wei Dou Cailing x. State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering School of Materials and Energy Lanzhou University College of Chemistry and Chemical Engineering Luoyang Normal University

Designing highly active and stable electrocatalysts of ox.gen evolution reaction （OER） is one of the crucial *** this study,a novel OER electrocatalyst,NiFe-MIL-53 modified with ultra-low rhodium（Rh@NiFe-MIL-53）,is successfully prepared via the hydrothermal ***-situ Raman spectroscopy and electrochemical impedance spectroscopy reveal that the doped Rh accelerates the phase transformation of NiFe-MIL-53 and the in-situ formed Rh@NiFeOOH is the actual active *** importantly,the enhanced reversibility of electrochemical reconstruction between NiFeOOH and NiFe（OH）2after doping Rh is beneficial for improving the electrochemical stability of the catalyst.x.ray photoelectron spectroscopy spectra show the strong electronic interaction between single-atom Rh and Ni/Fe in Rh@***,theoretical calculations confirm that the integration of single-atom Rh into the NiFeOOH successfully reduces the band gap,regulates the d-band center （εd）,accelerates the charge transfer,and optimizes the adsorption behavior of ox.gen-containing intermediates,thereby lowering the energy barrier of rate-determining ***,the optimized Rh@NiFe-MIL-53 ex.ibits ex.ellent OER activity （240 mV） with a small Tafel slope of 48.2 mV dec-1and long-term durability (over1270 h at 10 m A cm-2and 110 h at 200 mA cm-2).This work presents a new perspective on designing highly efficient OER electrocatalysts.

关键词： x.ray photoelectron spectroscopy

RECRYSTALLIZATION IN A SPINODAL Cu Ni Fe ALLOY

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Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 322-326页

作者： hao, S.M. hao, x.j. Zhao, G. Li, H.x. Northeastern Univ Shenyang China

The interaction of spinodal decomposition and recrystallization process, and the characteristic of recrystallization in Cu-Ni-Fe alloy aged at different temperatures after solution-treatment and cold rolling have been studied by structural analysis and Vickers hardness test. It has shown that the recrystallization of spinodal Cu -Ni-Fe alloy might be divided into 2 types: spinodal decomposition, recovery and recrystallization of two-phase microstructure take place in the deformed alloy aged below the spinodal temperature; while recrystallization of single-phase microstructure and growth of fully-recrystallized grains take place in the deformed alloy aged above the spinodal temperature. The deformed alloy aged below the spinodal temperature recrystallizes in cellular morphology.

关键词： Aging of materials Decomposition Iron alloys Metal melting Microstructure Morphology Nanotechnology Nickel alloys Permanent magnets Recrystallization (metallurgy)

A New Sesquiterpene from Michelia yunnanensis

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Chinese Chemical Letters 1998年第10期9卷 939-940页

作者： Hong, x.Wang, BG Zhou, j.hao, x. Acad Sinica Kunming Inst Bot Lab Phytochem Kunming 650204 Peoples R China

A new sesquiterpene, 12,13-di-acetox.l-1,4,6,11-eudesmanetetrol 1, was isolated from Michelia yunnanensis. The structure was elucidated on the basis of spectral data.

关键词： sesquiterpene 12,13-di-acetox.l-1,4,6,11-eudesmanetetrol Michelia yunnanensis

Contex.-free Grammars for Triangular Arrays

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Acta Mathematica Sinica,English Series 2015年第3期31卷 445-455页

作者： Robert x.j.hao Larry x.W.WANG Harold R.L.YANG Center for Combinatorics LPMC-TJKLC Nankai University

We consider contex.-free grammars of the form G = {f → f^b1＋b2＋1g^a1＋a2, g → f^b1 g^a1＋1},where ai and bi are integers sub ject to certain positivity conditions. Such a grammar G gives rise to triangular arrays {T（n, k）}0≤k≤n satisfying a three-term recurrence relation. Many combinatorial sequences can be generated in this way. Let Tn （x. =∑k=0^n T（n, k）x.k. Based on the differential operator with respect to G, we define a sequence of linear operators Pn such that Tn＋1（x. = Pn（Tn（x.）. Applying the characterization of real stability preserving linear operators on the multivariate polynomials due to Borcea and Br？ndén, we obtain a necessary and sufficient condition for the operator Pn to be real stability preserving for any n. As a consequence, we are led to a sufficient condition for the real-rootedness of the polynomials defined by certain triangular arrays, obtained by Wang and ***, as special cases we obtain grammars that lead to identities involving the Whitney numbers and the Bessel numbers.

关键词： Contex.-free grammar stable polynomials real-rootedness Bessel numbers Whitneynumbers

Laser ablation and structuring of CdZnTe with femtosecond laser pulses

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journal of Materials Science & Technology 2020年第13期47卷 180-185页

作者： j.j.j.Nivas E.Allahyari A.Vecchione Q.hao S.Amoruso x.Wang Dipartimento di Fisica“Ettore Pancini” Universitàdi Napoli“Federico II”Via CintiaI-80126 NapoliItaly CNR-SPIN UOS NapoliVia CintiaI-80126 NapoliItaly CNR-SPIN UOS SalernoVia Giovanni Paolo II132I-84084 Fisciano(SA)Italy North China Research Institute of Electro-Optics Beijing 100015China School of Remote Sensing and Information Engineering Wuhan UniversityWuhan 430072China

We report an ex.erimental investigation on laser ablation and associated surface structuring of CdZnTe by femtosecond Ti:Sa laser pulses(laser wavelengthλ≈800 nm,≈35 fs,10 Hz),in *** ex.loiting different static irradiation conditions,the fluence threshold and the incubation effect in CdZnTe are ***,surface treatment with a low laser fluence(laser pulse energy E≈5-10_μj)and number of shots(5x.ansion coefficients of Te inclusions and matrix.during the sample heating and cooling processes ensuing femtosecond laser *** with a larger number of pulses(N≈500,1000)with higher pulse energies(E≈30-50μj)results in the formation of welldefined laser-induced periodic surface structures(LIPSS)in the outskirts of the main crater,where the local fluence is well below the material ablation *** low spatial frequency and high spatial frequency LIPSS perpendicular to the laser polarization are found together and separately depending on the irradiation *** are ascribed to a process of progressive aggregation of randomly distributed nanoparticles produced during laser ablation of the deep crater in the region of the target irradiated by a fluence below the ablation threshold with many laser pulses.

关键词： Laser ablation Femtosecond laser surface processing CdZnTe Laser induced periodic surface structures Laser processing