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Micro-strain regulation strategy to stabilize perovskite lattice based on the categories and impact of strain on perovskite solar cells

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Journal of Energy Chemistry 2025年第1期100卷 578-604页

作者： Caixia Li Wenwu Liu Shiji Da Lingbin Kong Fen Ran State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050GansuChina School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050GansuChina

Photovoltaic metal halide perovskite solar cells(PSCs) convert light to electricity more efficiently than crystalline silicon cells, and the cost of materials used to make them is lower than that of silicon *** efficiency is not a core issue affecting the application of perovskite solar cells in special *** present, stability is the major technical encounters that hinders its further commercial development. Microstrain in PSCs is currently a significant factor responsible for the device's instability. Strain-induced ion migration is widely believed to accelerate perovskite degradation even when external stimuli are ***, it is imperative to study strain to enhance the stability of PSCs. This paper reviews recent developments to understand strain's origin and effect mechanisms on performance of PSCs, including ion migration,failure behavior, defect formation, and its effect on photoelectric properties, stability, and ***, several well-known strain management strategies are systematically introduced based on the strain effect mechanism and strain engineering on the film, providing more clues for further preparation with increased stability. The manipulation of external physical strain applied from films to entire devices has been extensively studied. Furthermore, recommendations for future research directions and chemical approaches have been provided. It is emphasized that strain engineering plays a crucial role in improving the efficiency and longevity of PSCs. Tensile strain causes rapid degradation, while moderate compressive strain and external strain control could improve properties and stability. Efforts should focus on controlling compressive strain to mitigate residual tensile strain and introducing it in a controlled manner. Future research endeavors may focus on exploring these pathways to improve the efficiency and lifespan of PSCs.

关键词： Halide perovskite solar cells Strain origins Strain effects Strain management

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Designing carboxymethyl cellulose based hydrogel electrolyte membranes enhanced by inorganic nanoparticle toward stable zinc anode

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Green Energy & Environment 2025年第3期10卷 537-550页

作者： Xiangye Li Yuan Li Yu Jiang Dahui Wang Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Department of Polymeric Materials EngineeringSchool of Material Science and EngineeringLanzhou University of TechnologyLanzhou730050China

Aqueous zinc metal batteries have garnered substantial attention ascribing to affordability,intrinsic safety,and environmental benignity Nevertheless,zinc metal batteries yet are challenged with potential service life issues resulted from dendrites and side *** this paper,a strategy of nanoparticles doped hydrogel is proposed for constructing carboxymethyl cellulose/graphite oxide hybrid hydrogel electrolyte membranes with exceptional ionic conductivity,anti-swelling property,and simultaneously addressing the dendrites and parasitic *** pivotal functions of the carboxymethyl cellulose/graphite oxide hydrogel electrolyte in mitigating hydrogen evolution and fostering accelerated Zn deposition have been elucidated based on principles of thermodynamic and reaction *** carboxymethyl cellulose/graphite oxide hydrogel electrolyte endows exceptional cycling longevity (800 h at 1 mA cm^(-2)/1 mAh cm^(-2)) for Znjj Zn battery,as well as high Coulombic efficiency for Znjj Cu battery (averagely 99.14%within 439 cycles at 1 mA cm^(-2)/1 mAh cm^(-2)).The assembled Znjj NH_(4)V_(4)O_(10)battery delivers a high reversible specific capacity of 328.5 mAh g^(-1)at 0.1 A g^(-1).Moreover,the device of Znjj NH_(4)V_(4)O_(10)pouch battery remains operational under severe conditions like bending and *** work provides valuable reference in developing inorganic nanoparticle hybrid hydrogel electrolyte for realizing high-performance zinc metal batteries.

关键词： Carboxymethyl cellulose Graphite oxide Hydrogel electrolyte Anti-swelling

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Electronic modulation towards MOFs as template derived CoP via engineered heteroatom defect for a highly effcient overall water splitting

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Journal of Energy Chemistry 2025年第2期101卷 598-607,I0012页

作者： Meijie Ding Zhiqiang Wei Dexue Liu Wenhua Zhao Qiang Lu Zhiming Li Qingsong Yu Chenggong Lu Hua Yang State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050GansuChina School of Science Lanzhou University of TechnologyLanzhou 730050GansuChina

The reasonable design of material morphology and eco-friendly electrocatalysts are essential to highly efficient water *** is proposed that a promising strategy effectively regulates the electronic structure of the d-orbitals of CoP using cerium doping in this paper,thus significantly improving the intrinsic property and conductivity of CoP for water *** a result,the as-synthesize porous Ce-doped CoP micro-polyhedron composite derived from Ce-ZIF-67 as bifunctional electrocatalytic materials exhibits excellent electrocatalytic performance in both the oxygen evolution reaction(OER)and the hydrogen evolution reaction(HER),overpotentials of about 152 mV for HER at 10 mA cm^(-2)and about 352 mV for OER at 50 mA cm^(-2),and especially it shows outstanding long-term ***,an alkaline electrolyzer,using Ce0.04Co0.96P electrocatalyst as both the anode and cathode,delivers a cell voltage value of1.55 V at the current density of 10 mA cm^(-2).The calculation results of the density functional theory(DFT)demonstrate that the introduction of an appropriate amount of Ce into CoP can enhance the conductivity,and can induce the electronic modulation to regulate the selective adsorption of reaction intermediates on catalytic surface and the formation of O*intermediates(CoOOH),which exhibits an excellent electrocatalytic *** study provides novel insights into the design of an extraordinary performance water-splitting of the multicomponent electrocatalysts.

关键词： Hydrogen evolution Cerium Phosphides Oxygen evolution Water splitting

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Enhanced rate capability and cycle stability of Ti2C MXene for sodium storage through an aniline molecules welding strategy

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Tungsten 2025年第1期7卷 161-171页

作者： Hao Chen Ya-Qin Wang Dong-Ting Zhang Bei Zhao Min-Peng Li Chen-Yang Li Tian-Peng Xu Mao-Cheng Liu State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou University of Technology School of Materials Science and Engineering Lanzhou University of Technology School of Computer and Communication Technology Lanzhou University of Technology

MXenes obtained significant attention in the field of energy storage devices due to their characteristic layered structure,modifiable surface functional groups,large electrochemically active surface,and regulable interlayer ***,the self-restacking and sluggish ions diffusion kinetics performance of MXenes during the alkali metal ions insertion/extraction process severely impedes their cycle stability and rate *** paper proposes an aniline molecule welding strategy for welding p-phenylenediamine（PPDA） into the interlayers of Ti2C through a dehydration condensation *** welded PPDA molecules can contribute pillar effect to the layered structure of *** pillar effect effectively maintains the structural stability during the sodium ions insertion/extraction process and effectively expands the interlayer spacing of Ti2C from 1.16 to 1.38 nm,thereby enhancing ions diffusion kinetics performance and improving the long-term cycle *** Ti2C-PPDA demonstrates outstanding Na+storage capability,exhibiting a specific capacity of 100.2 mAh·g-1at a current density of 0.1 A·g-1over 960 cycles and delivering a remarkable rate capability 81.2 mAh·g-1at a current density of 5 A·*** study demonstrates that expanding interlayer spacing is a promising strategy to enhance the Na+storage capacity and improve long-term cycling stability,which provides significant guidance for the design of two-dimensional Na+storage materials with high-rate capability and cycle stability.

关键词： Ti_2C Expanding interlayer spacing Sodium ions storage Diffusion kinetics Rate capability

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Effects of Precursor Alloy Temperatures and Gate Angle on the Microstructure of an Al–Si Alloy Prepared by Controlled Diffusion Solidification

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Russian Journal of Non-Ferrous metals 2025年第5期65卷 265-279页

作者： Li, Shaosi Li, Zhaoyang Chen, Tijun State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou China

The effects of temperature difference between two precursor melts and angle between two gates for pouring the two melts on the microstructure of controlled-diffusion-solidified Al–8Si alloy were investigated by simulation and experiment. The simulation results showed that only the temperature difference was higher than 50 K, the nucleation rate during mixing could reach a critical value (corresponding to ~30% of solidified mesh number in simulations), and thus, a microstructure with small and spheroidal primary grains was obtained. Increasing the gate angle was beneficial for achieving a mixed melt with smaller and more alloy 1 pockets, and thereby was helpful for increasing nucleation rate and obtaining an ideal nondendritic microstructure. The subsequent experiment results confirmed these simulation results. When the temperature difference and gate angle were at 80 K and 140° respectively, an Al–8Si casting with grain size of 52.0 μm and a shape factor of 1.40 was achieved.

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Effect of Aging Treatment on Properties and Post-weld Microstructure of Stainless Steel Containing Niobium

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稀有金属材料与工程 2025年第1期54卷 39-49页

作者： Liu Tianzeng Zhao Yanchun Chen Anzhong Yu Zhiqi Feng Li Li Jucang Pan Jixiang State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China Gansu Jiu Steel Group Hongxing Iron&Steel Co. LtdJiayuguan 735100China

The effects of different aging processes on the precipitated phase,mechanical properties,molten salt corrosion resistance and post-weld microstructure of 347H stainless steel were *** results show that a large number of precipitated phases appear in the crystal after aging at 700℃for 400 *** aging for 3000 h,the number of precipitated phases increases and most of them are gathered at the grain *** are two forms of precipitates,one is the coarse precipitate rich in Cr,and the other is the smaller precipitates mainly consisting of *** aging at 700℃for 30 min,the yield strength and tensile strength of the samples at room temperature and 593℃increase,but the elongation *** corrosion results in nitrate at 565℃show that the corrosion products of the aged samples are the same as that of the original samples,which are Fe_(2)O_(3),Fe_(3)O_(4),MgCr_(2)O_(4),MgFe_(2)O_(4),FeCr_(2)O_(4) and NaFeO_(2).The proportion of Fe_(3)O_(4) that is dense and well bonded to the subtrate in the original sample is higher than that in the aged sample,so the corrosion resistance is *** 700℃,the aging time has no obvious effect on the microstructure after welding.

关键词： aging 347H stainless steel precipitated phase mechanical properties molten salt corrosion welding property

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Wetting behavior and interfacial reactions of Cu–20Sn–2Cr alloy on various carbon substrates

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Journal of Materials Research and Technology 2025年 36卷 5861-5878页

作者： Wenjuan Ci Likai Yang Qiaoli Lin Yu Shi State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology No. 287 Langongping Road Lanzhou 730050 Gansu People's Republic of China

The effect of different carbon sources (CS) and the underlying mechanisms on wetting behavior, interfacial reaction products, and spreading kinetics at the reactive wetting interface between Cu-based alloys and carbon materials during brazing and composites preparation remain unclear. This study investigates the reactive wetting behavior of a Cu–20Sn–2Cr alloy on various carbon substrates (graphite (C gr ), polycrystalline diamond (C PD ), vitreous carbon (C V ), and multi-walled carbon nanotubes Bucky paper (C MW )) at 1100 °C using a modified sessile drop method. The results indicate the equilibrium contact angle ( θ e ) of C gr (7°), C PD (8°), and C V (11°) are close to each other, whereas the θ e values of C MW-back (83°) and C MW-front (69°) are higher. The reaction product layer (RPL) in C gr , C PD , and C V consists of a continuous and dense chromium carbides (Cr m C n ); the interface of C MW exhibit an “alloy + nanoscale Cr 3 C 2 cluster" transition zone. The spreading kinetics of C gr , C PD and C MW are controlled diffusion of Cr atoms to the triple line (TL) front, while Cv is controlled first by the diffusion of Cr atoms to the TL front, then is controlled by the reaction between Cr and C atoms at the TL front.

关键词： Carbon Wetting Interface Reactivity Microstructure Spreading kinetic

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Study on Synergistic Extraction of Iron from Carbide Slag and Nickel Slag

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Journal of Sustainable Metallurgy 2025年 1-10页

作者： Yang, Lushun Li, Bin Du, Xueyan Han, Mengyao School of Materials Science and Engineering Lanzhou University of Technology Lanzhou China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou China

Iron recovery from nickel slag, a significant byproduct generated during nickel pyrometallurgical process, represents a pivotal aspect of advancing sustainable utilization of metallurgical solid waste. This study explores the potential of utilizing carbide slag as a fluxing modifier to enhance iron extraction from nickel slag through the melting oxidation process. Thermodynamic simulations were conducted with FactSage software to predict phase equilibria and reaction pathway, while experimental analyses were performed to investigate phase composition, microstructural morphologies, and iron recovery efficiencies. The results indicate that in the FeO–SiO2–CaO–MgO slag system, predominant magnetite emerges as the primary iron-bearing phase in the spinel region. Increasing the slag’s basicity shifts the corresponding phase area of spinel increases first and then decreases. Thermodynamic predictions and experimental data corroborate that the addition of carbide slag facilitates the transformation of the fayalite phase into magnetite and pyroxene phases. Optimal basicity levels enhance the precipitation and crystal growth of magnetite, as well as promote the separation of iron from the slag matrix. Specifically, at a basicity of 0.5, the oxidized samples displayed the highest magnetite precipitation, with a recovery rate of 93.2%. Detailed microstructural analysis revealed the formation of well-defined dendritic magnetite crystals. These findings suggest that the introduction of carbide slag not only optimizes the phase transformation processes but also significantly enhances iron recovery, offering a viable pathway for the synergistic reutilization of nickel and calcium carbide slags.

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Effect of Co Content on Microstructure and Mechanical Properties of High-Entropy High-Temperature Shape Memory Alloy

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稀有金属材料与工程 2025年第1期54卷 10-16页

作者： Zhao Yanchun Jin Bo Feng Yuanfei Ma Huwen Yu Zhiqi Feng Li Liaw Peter K State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China Wenzhou Pump and Valve Engineering Research Institute of Lanzhou University of Technology Wenzhou 325105China Department of Materials Science and Engineering University of TennesseeKnoxville TN37996USA

(TiZrHf)_(50)Ni_(30)Cu_(20-x)Co_(x)(x=2,4,6,at%)high-entropy high-temperature shape memory alloys were fabricated by watercooled copper crucible in a magnetic levitation vacuum melting furnace,and the effects of Co content on microstructure and mechanical properties were *** results indicate that the grain size of the alloy decreases with increasing the Co *** the as-cast state,the alloy consists primarily of the B19′phase,with a trace of B2 *** fracture morphology is predominantly composed of the B19′phase,whereas the B2 phase is nearly *** the Co content or reducing the sample dimensions(d)markedly enhance the compressive strength and ductility of the *** d=2 mm,the(TiZrHf)_(50)Ni_(30)Cu_(14)Co_(6) alloy demonstrates the optimal mechanical properties,achieving a compressive strength of 2142.39±1.8 MPa and a plasticity of 17.31±0.3%.The compressive cyclic test shows that with increasing the compressive strain,the residual strain of the(TiZrHf)_(50)Ni_(30)Cu_(14)Co_(6) alloy increases while the recovery ability *** superelastic recovery capability of the alloy is continuously *** superelastic recovery rate increases from 1.36%to 2.12%,the residual strain rate rises from 1.79%to 5.52%,the elastic recovery rate ascends from 3.86%to 7.36%,while the total recovery rate declines from 74.48%to 63.20%.

关键词： high-temperature shape memory alloy high-entropy alloy microstructure mechanical property

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Progress on Microstructure and Performance Optimization in H/MEAs Regulated by Single and Hierarchical Heterostructures

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稀有金属材料与工程 2025年第3期54卷 640-664页

作者： Wang Bing Li Chunyan Wang Xinhua Li Xiaocheng Kou Shengzhong State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China Wenzhou Engineering Institute of Pump&Valve Lanzhou University of TechnologyWenzhou 325105China

The development of high-performance structural and functional materials is vital in many industrial ***-and medium-entropy alloys(H/MEAs)with superior comprehensive properties owing to their specific microstructures are promising candidates for structural *** importantly,multitudinous efforts have been made to regulate the microstructures and the properties of H/MEAs to further expand their industrial *** various heterostructures have enormous potential for the development of H/MEAs with outstanding ***,multiple heterogeneous structures with single and hierarchical heterogeneities were discussed in ***,preparation methods for compositional inhomogeneity,bimodal structures,dualphase structures,lamella/layered structures,harmonic structures(core-shell),multiscale precipitates and heterostructures coupled with specific microstructures in H/MEAs were also systematically *** deformation mechanisms induced by the different heterostructures were thoroughly discussed to explore the relationship between the heterostructures and the optimized properties of H/*** contributions of the heterostructures and advanced microstructures to the H/MEAs were comprehensively elucidated to further improve the properties of the ***,this review discussed the future challenges of high-performance H/MEAs for industrial applications and provides feasible methods for optimizing heterostructures to enhance the comprehensive properties of H/MEAs.

关键词： heterogeneous structures H/MEAs HDI effect microstructure regulation performance optimization

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