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Polymer Fiber Rigid Network with High Glass Transition Temperature Reinforces Stability of Organic Photovoltaics

Nano-Micro Letters 2024年第11期16卷 56-69页

作者： Qiao Zhou Cenqi Yan Hongxiang Li Zhendong Zhu Yujie Gao Jie Xiong Hua Tang Can Zhu Hailin Yu Sandra P.Gonzalez Lopez Jiayu Wang Meng Qin Jianshu Li Longbo Luo Xiangyang Liu Jiaqiang Qin Shirong Lu Lei Meng Frédéric Laquai Yongfang Li Pei Cheng College of Polymer Science and engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065People’s Republic of China KAUST Solar Center Physical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)ThuwalKingdom of Saudi Arabia Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China Department of Material Science and Technology Taizhou UniversityTaizhou 318000People’s Republic of China

Organic photovoltaics(OPVs)need to overcome limitations such as insufficient thermal stability to be *** reported approaches to improve stability either rely on the development of new materials or on tailoring the donor/acceptor morphology,however,exhibiting limited ***,it is timely to develop an easy method to enhance thermal stability without having to develop new donor/acceptor materials or donor–acceptor compatibilizers,or by introducing another third ***,a unique approach is presented,based on constructing a polymer fiber rigid network with a high glass transition temperature(T_(g))to impede the movement of acceptor and donor molecules,to immobilize the active layer morphology,and thereby to improve thermal stability.A high-T_(g) one-dimensional aramid nanofiber(ANF)is utilized for network *** OPVs with ANF network yield superior thermal stability compared to the ANF-free *** ANF network-incorporated active layer demonstrates significantly more stable morphology than the ANF-free counterpart,thereby leaving fundamental processes such as charge separation,transport,and collection,determining the device efficiency,largely *** strategy is also successfully applied to other photovoltaic *** strategy of incorporating a polymer fiber rigid network with high T_(g) offers a distinct perspective addressing the challenge of thermal instability with simplicity and universality.

关键词： Inverted organic photovoltaics Thermal stability Aramid nanofibers Morphology control Charge carrier dynamics

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Recyclable Perovskite Solar Cells with Lead Sulfate Contact

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CCS Chemistry 2024年第9期6卷 2254-2263页

作者： Guo-Bin Xiao Xijiao Mu Luyao Wang Zhen-Yang Suo Artem Musiienko Guixiang Li Zeying Guo Yiying Wu Antonio Abate Jing Cao 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 730000 State School of materials Science and engineering Shanghai Jiao Tong UniversityShanghai 200240 Department Novel materials and Interfaces for Photovoltaic Solar Cells Helmholtz-Zentrum Berlin für Materialien und Energie12489 Berlin Department of Chemistry and Biochemistry The Ohio State UniversityColumbusOhio 43210

Previous cost analysis of perovskite solar cells(PSCs)has revealed that the transparent conductive oxide(TCO)substrates account for most of the material cost,emphasizing the need to recover TCO in PSC ***,the conventional use of compact and ultrathin electron transport materials(ETMs)such as TiO_(2)and SnO_(2),poses a challenge to their removal from the substrate,hindering effective PSC ***,PbSO_(4) nanoparticles with(011)surface were used as ETM to fabricate *** yielded metallicity on the PbSO_(4) nanoparticle surface promoted extracted electron transport across the nanoparticle surface.A certified efficiency as high as 17.9%for the submodule(204.9 cm^(2))with PbSO_(4) was realized successfully,and the best effi-ciency on a small area(0.1 cm^(2))reached 24.1%.The PbSO_(4) layer was removed effortlessly from the substrate by simple aminoethanol washing to recover the TCO,the most expensive component of *** work provides a novel strategy to prepare soluble insulator-based ETMs by constructing metallic surfaces of nanoparticles;thus,fabricating efficient and recyclable PSCs.

关键词： wide-bandgap surface metallicity electron transport material perovskite solar cells recyclability

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Carboxylic bacterial cellulose fiber-based hydrogel electrolyte with imidazole-type ionic liquid for dendrite-free zinc metal batteries

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materials Reports(Energy) 2024年第2期4卷 45-53页

作者： Tianyun Zhang Xiaohong Shi Yu Li Sambasivam Sangaraju Fujuan Wang Liang Yang Fen Ran School of Mechanical and Electronical engineering Lanzhou University of TechnologyLanzhou730050PR China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and EngineeringLanzhou University of TechnologyLanzhou730500PR China National Water and Energy Center United Arab Emirates UniversityAl Ain15551United Arab Emirates

Aqueous zinc metal batteries are regarded as the most promising energy storage system due to their advantages of high safety,low cost,and high theoretical ***,the growth of dendrites and the occurrence of side reactions hinder the development of zinc metal *** previous attempts to design advanced hydrogel electrolytes,achieving high mechanical performance and ionic conductivity of hydrogel electrolytes has remained *** this work,a hydrogel electrolyte with an ionic crosslinked network is prepared by carboxylic bacterial cellulose fiber and imidazole-type ionic liquid,following by a covalent network of *** hydrogel electrolyte possesses a superior ionic conductivity of 43.76 mS cm^(−1),leading to a Zn^(2+)migration number of 0.45,and high mechanical performance with an elastic modulus of 3.48 GPa and an elongation at breaking of 38.36%.More importantly,under the anion-coordination effect of the carboxyl group in bacterial cellulose and[BF4]−in imidazole-type ionic liquid,the solvation sheath of hydrated Zn^(2+)ions and the nucleation overpotential of Zn plating are *** results of cycled testing show that the growth of zinc dendrites is effectively inhibited and the generation of irreversible by-products is *** the carboxylic bacterial cellulose-based hydrogel electrolyte,the Zn||Zn symmetric batteries offer good cyclability as well as Zn||Ti batteries.

关键词： Bacterial cellulose fiber Ionic liquids Carboxylic group Gel electrolyte Zn metal batteries

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Optimizing piezoelectric performance of complex perovskite through increasing diversity of B-site cations

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Journal of materials Science & Technology 2024年第3期170卷 78-86页

作者： Mengdi Cheng Dongyan Zhang Yangxi Yan Zhimin Li Pangpang Wang Ri-ichi Murakami School of Advanced materials and Nanotechnology Xidian UniversityXi’an 710126China Nanomaterials Group Institute of SystemInformation Technologies and Nanotechnologies(ISIT)Fukuoka Industry-Academia Symphonicity(FiaS)4-1 KyudaishinmachiNishi-kuFukuoka 819-0388Japan School of Mechanical engineering Chengdu UniversityChengdu 610106China

Piezoelectric materials with unique properties are hugely appealing for high sensitivity sensors and ultrasonic ***,Pb(Ni_(1/3)Nb_(2/3))O_(3)-Pb(Yb_(1/2)Nb_(1/2))O_(3)-PbTiO_(3)piezoelectric system was designed and investigated in *** optimized piezoelectric response(d_(33)=826 pC/N,d_(33)∗=1017 pm/V)together with good temperature stability and negligible performance degradation up to 10^(6) cycles was achieved in 0.58PNN-0.10PYN-0.32PT *** analysis revealed the amplification of intrinsic and extrinsic contributions in MPB region due to more spontaneous polarization orientations and an increase in chemical disorder of system after the introduction of *** origin of high piezoelectric response was investigated through the combination of scanning electron microscopy and piezoresponse force *** diversity of B-site cations was shown to enhance local structural heterogeneity,weaken long-range ferroelectric ordered domains,and lower free energy barrier via the formation of nanodomain configuration that promoted polarization rotation,thereby improving piezoelectric properties of the ***,it is suggested that increasing the diversity of B-site cations is an effective strategy for achieving outstanding piezoelectric performance.

关键词： PNN-PYN-PT ceramics Piezoelectricity enhancement Relaxation behavior Domain structure

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Origin of water in the Moon

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National Science Review 2024年第6期11卷 10-12页

作者： Hejiu Hui Ziyan Han Kang Shuai State Key Laboratory of Mineral Deposits Research & Lunar and Planetary Science Institute School of Earth Sciences and Engineering Nanjing University CAS Center for Excellence in Comparative Planetology CAS Key Laboratory of Earth and Planetary physics Institute of Geology and Geophysics

It has been well known since the Apollo era that the Moon is relatively depleted in volatiles as a result of the Moonformation impact and the subsequent planetary differentiation. The lunar interior was believed to have been extremely dry [1]. The discovery of indigenous water (a collective term for H-bearing species OH, H2O, etc.) in various lunar materials [2–5] has driven a paradigm shift in our knowledge of water in the Moon, from a dry to a wet Moon.

关键词： LUNAR HYDROGEN TERRESTRIAL INTERIOR

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Observing strain glass transition in Ti_(33)Nb_(15)Zr_(25)Hf_(25)O_(2)high entropy alloy with Elinvar effect

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Journal of materials Science & Technology 2024年第1期168卷 16-23页

作者： Kaichao Zhang Kai Wang Bin Wang Chao Lv Jiaxing Zheng Guanqi Li Yu Fu Wenlong Xiao Qingqing Cai Xutao Nie Yingfeng Shao Huilong Hou Xinqing Zhao School of materials Science and engineering Beihang UniversityBeijing 100191China China Aerodynamics Research and Development Center Mianyang 621000China State Key Laboratory of Nonlinear Mechanics Chinese Academy of SciencesInstitute of MechanicsBeijing 100190China Tianmushan Laboratory(Zhejiang Provincial Laboratory for Aviation) Hangzhou 310000China

Exploring the phase transition of high entropy alloys(HEAs)with multiple major elements is of great importance for understanding the underlying physical *** martensitic phase tran-sition has been frequently reported in HEAs,however,nanoscale microstructural phase evolution has not been investigated to the same ***,we have prepared the Ti_(33)Nb_(15)Zr_(25)Hf_(25)O_(2)HEA and investi-gated the strain glass transition and its associated properties using dynamic mechanical analysis and mi-crostructure *** have found that the elastic modulus in Ti_(33)Nb_(15)Zr_(25)Hf_(25)O_(2)HEA deviates from Wachtman’s equation and observed the Elinvar effect in the form of temperature-independent mod-ulus in the temperature range from 150 K to 450 K and frequency-dependence modulus around 220 *** strain glass transition has been evidenced in Ti_(33)Nb_(15)Zr_(25)Hf_(25)O_(2)HEA by the formation and growth of nano-sized domains during in-situ transmission electron microscopy(TEM)cooling,and substantiated by the broken ergodicity during zero-field-cooling/*** strain glass transition is believed to account for the Elinvar effect,where the modulus hardening of nano-sized domains compensates dynam-ically with the modulus softening of the transformable matrix.

关键词： High entropy alloys Strain glass transition Elinvar effect Microstructural evolution Nanodomains

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Enhancing the deep-red/near-infrared fluorescence of higher rylene diimides via the chalcogen-annulation strategy

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Science China Chemistry 2024年第4期67卷 1324-1333页

作者： Kai Chen Xiao Chen Ke Hu Yilun Zhao Yujian Liu Guogang Liu Jinquan Chen Wei Jiang Zhigang Shuai Da-Hui Qu Zhaohui Wang Key Laboratory for Advanced materials and Joint International Research Laboratory of Precision Chemistry and Molecular engineering Feringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory of Organic Optoelectronics and Molecular engineering Department of ChemistryTsinghua UniversityBeijing 100084China State Key Laboratory of Precision Spectroscopy East China Normal University500 Dongchuan RoadShanghai 200241China

Deep-red/near-infrared fluorescence is highly suitable for bioimaging owing to its ability to deeply penetrate tissues,organs,and live ***,developing organic fluorophores with high deep-red/near-infrared fluorescence quantum yield(Φ_(FL))and fluorescent brightness remain a significant challenge owing to the energy gap ***,we developed a straightforward and effective chalcogen-annulation strategy by introducing O,S and Se into the bay region of TDI and QDI fluorophores,realizing the increase ofΦFLand fluorescent brightness up to 10 *** our best knowledge,this study potentially stands as the pioneering instance showcasing the anti-heavy-atom effect of chalcogens,and the absoluteΦFL(93%)and fluorescent brightness(128,200 cm^(-1)mol^(-1)L)of Se-TDI is among top deep-red/near-infrared organic fluorophores currently *** femtosecond transient absorption(fs-TA)measurements show the absence of obvious changes of the excited state lifetime after the introduction of chalcogens in TDI and QDI fluorophores,indicating that intersystem crossing(ISC)can be neglected in TDI and QDI *** calculations further reveal the chalcogen-annulation strategy increase the radiative rates and reduce the reorganization energy of several accepting modes at the ground state in TDI fluorophores,leading to the suppression of internal conversion(IC)*** chalcogen-annulation strategy,which effectively increases the Φ_(FL)and restricts the IC processes,while remaining unaffected by the heavy-atom effect,offers novel insights and theoretical support for the design and synthesis of deep-red/near-infrared organic fluorophores with high Φ_(FL)and fluorescent brightness.

关键词： π-extended rylene diimides chalcogen-annulation strategy deep-red/near-infrared fluorescence

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Ethanol-assisted synthesis of a Ni single-atom catalyst with poriferous 3D framework for efficient cascade CO_(2)electroreduction

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Rare Metals 2024年第9期43卷 4612-4619页

作者： Feng Wu Shi-Qi Wang Sebastian Kunze Xiao-Ping Gao Pei-Qun Yin Yu-En Wu Division of Life Sciences and Medicine Department of EndocrinologySchool of Chemistry and Materials ScienceThe First Affiliated Hospital of USTCUniversity of Science and Technology of ChinaHefei 230026China Department of Chemistry Seoul National UniversitySeoul 08826South Korea School of Biomedical engineering Anhui Medical UniversityHefei 230032China

The electroreduction of carbon dioxide to generate multicarbon products is significant for achieving a carbon-neutral ***,the selectivity for multi-carbon products faces several challenges,such as the intricate nature of the multistep hydrogenation processes,slow reaction kinetics and the bicarbonate precipitate issue caused by alkaline *** factors hinder the extensive utilization of this ***,we successfully developed and implemented a tandem electrolyzer cascade to separate and optimize the complex elementary reactions involved in the process of multi-carbon production.

关键词： reaction. synthesis catalyst

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Thermodynamic performance of a cryogenic energy storage system based on natural gas liquefaction

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Energy Storage and Saving 2024年第1期3卷 23-29页

作者： Xiaoqiao Qin Hongbo Tan Wei Shen Na Wen Yu Sun Department of Refrigeration and Cryogenic engineering School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an710049China Yingde Gases(Shanghai)Group Company Limited Shanghai210035China Technical Institute of physics and Chemistry CASBeijing100190China

Cryogenic energy storage(CES)is a viable method for grid-scale electrical energy *** the high energy density and mature application of liquefied natural gas(LNG),we proposed an LNG cryogenic energy storage(LNGES)system.A steady-state process model of the LNGES system was established using Aspen *** effects of the natural gas composition and key operating parameters such as the charging pressure,discharging pressure,throttling temperature,and liquid storage pressure on the system performance were investigated.A multi-parameter genetic algorithm model built using the MATLAB software was used to optimize the LNGES system to optimize the round-trip efficiency(RTE).Then,an exergy analysis of the optimal configuration was *** results suggested that the LNGES system could achieve optimal RTE and exergy efficiency values of 60.14%and 71.64%,*** destruction mainly occurred during the compression,throttling,expansion,and heat *** proposed LNGES system could be a promising candidate for the large-scale application of CES technology in power grids and gas networks.

关键词： Cryogenic energy storage Liquefied natural gas Genetic algorithm optimization Round-trip efficiency Exergy analysis

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Damage characteristics of Cu−Cr−Zr alloy rail of electromagnetic railgun after simulated launch

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Transactions of Nonferrous Metals Society of China 2024年第8期34卷 2589-2604页

作者： Ke-chang SHEN Qing-tao GONG Zhong-yu SUN Hong-tu SUN Bin-jie MA Wei-min WANG Ulsan Ship and Ocean College Ludong UniversityYantai 264025China Key Laboratory for Liquid-Solid Structural Evolution and Processing of materials Ministry of EducationSchool of Materials Science and EngineeringShandong UniversityJinan 250061China

The damage characteristics of different speed sections of Cu−Cr−Zr alloy rail after simulated launch were *** microstructure,morphologies and properties of samples were investigated by using XRD,XPS,EBSD,SEM,hardness test,electrochemical test and DSC *** was found that deposition layers were formed on the surfaces of the simulated launch *** thickness and surface roughness of these deposition layers increased with increasing the heat effect,suggesting a launch speed dependent damage degree of the arc *** hardness variation of samples is attributed to the effects of the deposition layer and deformation *** surface deposition layer affects corrosion resistance and crystalline characteristics,leading to changes in subsequent service ***,the surface texture and plastic deformation ability of the samples are related to the recrystallization degree and deformation grain amount.

关键词： Cu−Cr−Zr alloy electromagnetic railgun arc ablation microstructure performance

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