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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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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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Deciphering Water Oxidation Catalysts:The Dominant Role of Surface Chemistry over Reconstruction Degree in Activity Promotion

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Nano-Micro Letters 2025年第3期17卷 340-354页

作者： Li An Jianyi Li Yuanmiao Sun Jiamin Zhu Justin Zhu Yeow Seow Hong Zhang Nan Zhang Pinxian Xi Zhichuan J.Xu Chun‑Hua Yan State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceFrontiers Science Center for Rare IsotopesCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000People’s Republic of China School of Materials science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Faculty of Materials science and Energy Engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China Key Laboratory of Electromagnetic Materials and Devices National Center for International Research On Photoelectric and Energy MaterialsSchool of Materials and EnergyElectron Microscopy CenterYunnan UniversityKunming 650091People’s Republic of China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030People’s Republic of China Beijing National Laboratory for Molecular sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsPKU‑HKU Joint Laboratory in Rare Earth Materials and Bioinorganic ChemistryPeking UniversityBeijing 100871People’s Republic of China

Water splitting hinges crucially on the availability of electrocatalysts for the oxygen evolution *** surface reconstruction has been widely observed in perovskite catalysts,and the reconstruction degree has been often correlated with the activity ***,a systematic study on the roles of Fe substitution in activation of perovskite LaNiO_(3)is *** substituting Fe content influences both current change tendency and surface reconstruction ***_(0.9)Fe_(0.1)O_(3)is found exhibiting a volcano-peak intrinsic activity in both pristine and reconstructed among all substituted perovskites in the LaNi_(1-x)Fe_(x)O_(3)(x=0.00,0.10,0.25,0.50,0.75,1.00)*** reconstructed LaNi_(0.9)Fe_(0.1)O_(3)shows a higher intrinsic activity than most reported NiFe-based ***,density functional theory calculations reveal that Fe substitution can lower the O 2p level,which thus stabilize lattice oxygen in LaNi0.9Fe0.1O3 and ensure its long-term ***,it is vital interesting that activity of the reconstructed catalysts relied more on the surface chemistry rather than the reconstruction *** effect of Fe on the degree of surface reconstruction of the perovskite is decoupled from that on its activity enhancement after surface *** finding showcases the importance to customize the surface chemistry of reconstructed catalysts for water oxidation.

关键词： Oxygen evolution reaction Perovskite oxides Doping Activation and reconstruction

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De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal[3+2]annulation

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science China Chemistry 2025年第1期68卷 174-180页

作者： Fan-Xiao Meng Xing-Yu Wang Ka Lu Ju-Song Yang Fu-Min Zhang Ai-Jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Biotechnology and Health sciences Wuyi UniversityJiangmen 529020China

Herein,the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO)complex catalyze asymmetric formal[3+2]cycloaddition between quinones and ynamides is explored,producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent ***,density functional theory calculations were applied to explain the possible reaction mechanism.

关键词： benzofuran atropisomers novel de novo synthetic strategy asymmetric formal[3+2]cycladdition Cu/SPDO complex DFT calculations

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A surface engineering strategy for the stabilization of zinc metal anodes with montmorillonite layers toward long-life rechargeable aqueous zinc ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 94-105页

作者： Wenbo Wang Ruifeng Xu Xu Zhang Peiyu Wang Bao Yang Bingjun Yang Juan Yang Kailimai Su Pengjun Ma Yanan Deng Xianfeng Fan Wanjun Chen Key Laboratory for Electronic Materials College of Electrical EngineeringNorthwest Minzu UniversityLanzhou 730000GansuChina Resource Chemistry and Energy Materials Research Center State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesUniversity of Chinese Academy of SciencesLanzhou 730000GansuChina Institute for Materials and Processes School of EngineeringUniversity of EdinburghMayfield RoadEdinburgh EH93JLUK

Rechargeable aqueous zinc-ion batteries(AZIBs)exhibit appreciable potential in the domain of electrochemical energy ***,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evolution reaction(HER),and corrosion side ***,we propose a surface engineering modification strategy for coating the montmorillonite(MMT)layer onto the surface of the Zn anode to tackle these issues,thereby achieving high cycling stability for rechargeable *** results reveal that the MMT layer on the surface of the Zn anode is able to provide ordered zincophilic channels for zinc ions migration,facilitating the reaction kinetics of zinc *** functional theory(DFT)calculations and water contact angle(CA)tests prove that MMT@Zn anode exhibits superior adsorption capacity for Zn^(2+)and better hydrophobicity than the bare Zn anode,thereby achieving excellent cycling ***,the MMT@Zn||MMT@Zn symmetric cell holds the stable cycling over 5600 h at 0.5 mA cm^(-2)and 0.125 m A h cm^(-2),even exceeding 1800 h long cycling under harsh conditions of 5 m A cm^(-2)and 1.25 m A h cm^(-2).The MMT@Zn||V_(2)O_(5)full cell reaches over 3000 cycles at 2 A g^(-1)with excellent rate ***,this surface engineering modification strategy for enhancing the electrochemical performance of AZIBs represents a promising application.

关键词： Surface engineering strategy Montmorillonite layer Protection mechanism of Zn anode Cycling stability Aqueous zincionbatteries

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Annual Optimal Performance Analysis of Micro Heat Pipe PV/T under Different Angles in Northwest China

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Journal of Thermal science 2025年第02期 400-412页

作者： LIU Xiaomin WU Qingbai LI Jinping Vojislav NOVAKOVIC School of Energy and Power Engineering Lanzhou University of Technology Collaborative Innovation Center for Supporting technology of Northwest Low-Carbon Towns gansu Key Laboratory of Complementary Energy System of Biomass and Solar Energy gansu Natural Energy Research Institute Department of Energy and Process Engineering Norwegian University of Science and Technology

The exploitation of photovoltaic/thermal（PV/T） systems,which facilitate concurrent conversion of solar radiation into electrical and heat energies,presents substantial potential in the solar-abundant northwestern zone of *** investigation endeavors to evaluate the efficacy of a micro heat pipe（M-HP） PV/T system via exhaustive experimental analysis conducted in *** improve the performance of M-HP-PV/T system,a comparison was made between the optimal angles for each day and the entire *** system inside greenhouse exhibited an average photovoltaic conversion efficiency（PCE） and thermal conversion efficiency（TCE） of12.32% and 42.81%.The system of external environment registered average PCE and TCE values of 12.99% and21.08%.To further understand the system's operational results,a mathematical model was constructed through the integration of experimental data,exhibiting good agreement between the simulated outcomes and empirical *** average solar irradiance of daily optimum angle was 728.3 W/m2;the annual optimum angle was 29° with an average solar irradiance of 705.6 W/*** average annual total powers at the optimal angle outside the greenhouse and inside the greenhouse were 448.0 W and 398.7 *** average annual total efficiencies at the optimal angle outside the greenhouse and inside the greenhouse were 40.8% and 56.9%.The total power in the greenhouse was lower by 49.3 W,while total efficiency in the greenhouse was higher by 16.1%.

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Amino acid assisted aqueous synthesis of highly stable CsPbBr_(3)nanocrystals for cell imaging

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Nano Research 2025年第1期18卷 675-683页

作者： Xue Li Yanan Guo Guoying Tan Qingyi Liu Nan Song Yu Tang State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

Lead halide perovskite nanocrystals(NCs)exhibit excellent optoelectronic performance and have drawn great interests in the fields of biological imaging and ***,the poor stability of CsPbX_(3)(X=Cl,Br,I)in water is still a challenge to hinder their practical *** this work,a facile strategy has been developed for aqueous synthesis of CsPbX_(3) nanocrystals,in which L-glutamic acid(LGlu)has been used to replace oleic acid in the synthetic *** from the synergic effects of L-Glu and oleylamine(OAm),CsPbBr_(3)nanocrystals(L-Glu/OAm-CsPbBr_(3)NCs)with high water stability have been directly prepared under a mild condition at room temperature in water,facilitated by the process of crystal phase transformation from Cs_(4)PbBr_(6) to CsPbBr_(3).L-Glu/OAm-CsPbBr_(3)NCs exhibit a high quantum yield of 85%and a narrow full width at half maximum of 16 nm,demonstrating their efficient luminescence in ***,L-Glu on the surface have contributed greatly to an acidic environment and passivation of surface defects,improving the water stability and dispersibility of CsPbBr_(3)***,L-Glu/OAm-CsPbBr_(3)NCs exhibit great biocompatibility due to the presence of L-Glu,resulting in their good performance for HeLa cell ***,we propose a facile and effective method to prepare CsPbBr_(3)nanocrystals with excellent water stability by using L-Glu and OAm as cooperated ligands and expand their application in cell imaging.

关键词： aqueous synthesis cell imaging lead halide perovskite nanocrystals L-glutamic acid phase transformation

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硅肥与菌剂配施缓解兰州百合连作障碍的关键真菌群落分析

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植物营养与肥料学报 2025年第02期 395-406页

作者：王怡钦于彦琳杨宏羽李慧侯磊满华丽韩佳师桂英甘肃农业大学园艺学院平凉市植物保护中心甘肃省干旱作物国家重点实验室

【目的】硅与微生物菌剂可缓解连作障碍，研究百合连作土壤中关键微生物群落变化，为微生物菌剂与硅肥在食用百合生产中的应用提供参考。【方法】于2019年3月—2022年8月，进行了为期3年的田间试验。供试土壤已连续种植百合9年。试验设... 详细信息

【目的】硅与微生物菌剂可缓解连作障碍，研究百合连作土壤中关键微生物群落变化，为微生物菌剂与硅肥在食用百合生产中的应用提供参考。【方法】于2019年3月—2022年8月，进行了为期3年的田间试验。供试土壤已连续种植百合9年。试验设置4个处理：单施硅肥(SF)，单施微生物菌剂“Special 8?”(MF)，硅肥与菌剂组合施用(SMF)，不施硅肥和菌剂的对照(CK)。在2020年、2021年百合苗期，测定植株地上部分和鳞茎干重、株高和茎粗，并计算其壮苗指数。在2020年7月(百合开花期)，每个小区选择20株，在距茎基部10 cm、深20 cm处取土壤样品，测定土壤有机质和有效硅含量，采用ITS高通量测序测定土壤真菌群落，并分析特有微生物群落。【结果】与CK处理相比，3个施肥处理显著促进了百合植株生长，提高了壮苗指数，硅肥与微生物菌剂处理还增加了真菌的相对丰度(RA)及多样性，改变了其群落结构。一些微生物群落与壮苗指数或土壤有效硅含量显著相关，真菌属Fusarium、Dactylonectria、Humicola、Mortierella、Stilbella，以及种Humicola＿grisea，与壮苗指数或土壤有效硅含量呈正相关，另外一些属，如Mortierella、Stilbella、Holtermanniella，以及种Mortierella fatshederae与壮苗指数或土壤有效硅含量呈负相关。网络分析结果显示，在相对丰度(RA)>0.2%的前20个真菌属和前16个细菌属中，Holtermanniella是唯一与细菌具有相关性的真菌属，该类微生物与细菌属Blastococcus.呈显著负相关，是连接土壤真菌和细菌群落的关键属。微生物功能预测结果显示，与CK相比，SF、MF及SMF处理降低了病原真菌数量，增加了益生功能群，如外生菌根真菌、植物腐生菌、叶片腐生菌和丛枝菌根真菌。【结论】硅肥与微生物制剂配施可恢复土壤真菌群落多样性，提高植株残体的降解，减少土壤病原微生物数量，优化土壤真菌群落结构，进而缓解兰州百合连作障碍。在该施肥模式下，具有有机物转化功能的益生菌属Humicola及其种H. grisea，以及具有病原物拮抗功能的益生菌属Acremonium，在改善土壤健康方面发挥着重要作用。

关键词：兰州百合土壤真菌多样性病原菌腐生菌硅肥微生物菌剂

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Multi-scenario simulation of land use change and its impact on ecosystem services in the northeastern edge of the Qinghai-Xizang Plateau,China

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Journal of Arid Land 2025年第2期17卷 145-166页

作者： ZHANG Xuebin LIU Yanni YIN Junfeng SHI Peiji FENG Haoyuan SHI Jing College of Geography and Environmental science Northwest Normal UniversityLanzhou 730070China Faculty of Geographic sciences Beijing Normal UniversityBeijing 100875China State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems College of EcologyLanzhou UniversityLanzhou 730000China

The Qinghai-Xizang Plateau(QXP)serves as a crucial ecological barrier in China and Asia,exerting profound influences on global climate and biodiversity *** Tibetan Autonomous Prefecture(hereinafter referred as Gannan Prefecture),located on the northeastern edge of the QXP,represents a fragile alpine ecosystem in which land use change significantly impacts ecosystem services(ESs).This study established a comprehensive framework,utilizing the Patch-generating Land-Use Simulation(PLUS)model coupled with the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model to predict land use patterns under the natural development scenario,cultivated land protection scenario,and ecological protection scenario for Gannan Prefecture by 2030 and evaluated four critical ESs:habitat quality(HQ),water yield(WY),soil retention(SR),and carbon storage(CS).The primary aim is to elucidate the impacts of dynamic land use change on *** results revealed that,from 2000 to 2020,HQ exhibited minimal variation,whereas CS experienced a slight ***,WY and SR showed significant *** the natural development scenario,construction land was projected to increase by 4247.74 hm^(2),primarily at the expense of forest *** cultivated land protection scenario anticipated an increase in farmland by 2634.36 hm^(2),which was crucial for maintaining food *** ecological protection scenario predicted a notable expansion of forest land,accompanied by a restrained development rate of construction *** ecological protection scenario also showed an increase in the ecosystem service index(ESI),encompassing 26.07%of the *** land and grassland emerged as the primary contributors to ESs,while construction land substantially impacted *** bodies exhibited minimal contribution to *** study enhanced the understanding of land use change impacts on ESs in fragile and high-altitude ecosystems,offering essential theoretical framework

关键词： PLUS-InVEST model ecosystem service habitat quality water yield soil retention carbon storage Qinghai-Xizang Plateau

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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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