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Preparation, interfacial regulation and strengthening of Mg/Al bimetal fabricated by compound casting: A review

Journal of Magnesium and Alloys 2023年第9期11卷 3059-3098页

作者： Guangyu Li Wenming Jiang Feng Guan Zheng Zhang Junlong Wang Yang Yu Zitian Fan State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Mg/Al bimetal combines the advantages of both aluminum and magnesium and has broad application prospects in automotive, aerospace,weapons, digital products and so on. The compound casting has the characteristics of low cost, easy to achieve metallurgical combination and suitable for the preparation of complex bimetallic parts. However, bimetallic joint strength is low due to differences of physical properties between Al and Mg, oxide film on metallic surface and interfacial Al-Mg IMCs, which is closely related to the interfacial microstructure and properties. Therefore, how to control the interface of the bimetal to achieve performance enhancement is the focus and difficulty in this field. At present, there are mainly the following strengthening methods. First, the “zincate galvanizing” and “electrolytic polishing+anodic oxidation” technology were exert on the surface of Al alloy to remove and break the oxide film, which improved the wettability between Al and Mg. Second, the undesirable Al-Mg IMCs were reduce or elimination by adding the interlayers(Zn, Ni and Ni-Cu). Thirdly, the evolution process of interfacial microstructure was changed and fine strengthening phases were formed by adding Si element to Al alloy or rare earth element to Mg alloy. Fourthly, mechanical vibration and ultrasonic vibration were applied in the process of the filling and solidification to refine and homogenize the interfacial structure. Finally, some other methods, including secondary rolling, thermal modification, heat treatment and constructing exterior 3D morphology, also can be used to regulate the interfacial microstructure and compositions. The above strengthening methods can be used alone or in combination to achieve bimetallic strengthening. Finally, the future development direction of the Mg/Al bimetal is prospected, which provides some new ideas for the development and application of the Mg/Al bimetal.

关键词： Mg/Al bimetal Preparation Compound casting interfacial regulation Interface strengthening Research progress

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Achieving improved stability and minimal non-radiative recombination loss for over 18%binary organic photovoltaics via versatile interfacial regulation strategy

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Science China Chemistry 2022年第8期65卷 1623-1633页

作者： Lifu Zhang Houdong Mao Liqiang Huang Lei Hu Xinkang Wang Licheng Tan Yiwang Chen College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330031China National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal UniversityNanchang 330022China Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai 201804China

interfacial regulation,serving multiple roles,is critical for the fabrication of stable and efficient organic photovoltaics(OPVs).Herein,a multifunctional cathode interlayer PDINO(15 nm)is prepared by regulating film thickness,which is inserted between active components and stable silver electrode to align work function,and maintain good interfacial contact and device *** thick film can help to reduce interfacial surface defects,keep stable surface morphology,and block the silver diffusion into the active ***,the optimal PM6:Y6 device records an impressive power conversion efficiency(PCE)of 17.48%with minimized non-radiative recombination loss of 0.239 *** importantly,the unencapsulated device maintains 91%of the original PCE after aging for over 60 days at 25℃ and 10%relative humidity in dark ***,the PM6:eC9 device achieves a remarkable PCE of 18.22%with the enhancement of open-circuit voltage(V_(oc)).Furthermore,the 1 cm^(2) device-based PDINO(15 nm)/Ag shows a high PCE of 15.2%while only 12.6%for PDINO(9 nm)/Al,indicating the good compatibility of PDINO(15 nm)interlayer with the R2R coating processes used in large-area OPVs *** work highlights the promise of interfacial regulation to simultaneously stabilize and enhance the efficiency of organic photovoltaics.

关键词： organic photovoltaics interfacial regulation device stability non-radiative recombination loss high performance

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interfacial regulation of All-Inorganic CsPbBr3 Perovskite Solar Cells

Interfacial Regulation of All-Inorganic CsPbBr3 Perovskite S...

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第七届新型太阳能电池材料科学与技术学术研讨会

作者： Jialong Duan Yudi Wang Xiya Yang Lídice Vaillant Roca Qunwei Tang Institute of New Energy Technology College of Information Science and TechnologyJinan University Institute of Materials Science and Technology(IMRE) University of Havana

Hole-free,all-inorganic CsPbBr perovskite solar cells have been regarded as one of promising candidates to resolve the instability issue of the state-of-the-art photovoltaics based on organic-inorganic hybrid ***,owing to the larger bandgap and energy barrier between perovskite film and carbon electrode,the corresponding efficiency is unsatisfactory.A fact is that boosted charge extraction is a precondition for high-efficiency perovskite solar *** the aim to resolve the above-mentioned issues and to enhance the efficiency without sacrificing the long-term stability,we have precisely regulated the CsPbBr/carbon interface by introducing the hole-boosted Cu(Cr,M)O(M=Ba,Ca or Ni) nanocrystals and alkyl chain regulated CuInS/ZnS quantum ***,the interstitial oxygen amount has been significantly enhanced by partial substituting the Cr with the larger ions(Ba,Ca or Ni),which is mainly attributed to the induced lattice expansion and therefore more interstitial oxygen atoms inserted into host CuCrO ***,by precisely controlling alkyl chain length of ligands on the surface of CuInS/ZnS quantum dots,a balance between surface dipole induced charge coulomb repulsive force and quantum tunneling distance is achieved to maximize charge *** a result,a champion efficiency of 10.85% has been achieved with excellent long-term stability under persistent attack by 80%RH,80℃ or light irradiation in air.

关键词： All-inorganic perovskite solar cells interfacial regulation Charge extraction Long-term stability

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interfacial chemistry ofγ-glutamic acid-derived block polymer binder directing the interfacial compatibility of high voltage LiNi0.5Mn1.5O4 electrode

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Science China Chemistry 2021年第1期64卷 92-100页

作者： Yue Ma Chengdong Wang Jun Ma Gaojie Xu Zheng Chen Xiaofan Du Shu Zhang Xinhong Zhou Guanglei Cui Liquan Chen Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China College of Chemistry and Molecular Engineering Qingdao University of Science&TechnologyQingdao 266042China Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China

LiNi0.5Mn1.5O4(LNMO)spinel is one of the most promising high voltage cathode candidates for lithium ion batteries(LIBs).However,owing to the instability for organic electrolytes at 5V high voltage,it exhibits continuous oxidation,leading to the formation of unstable interface and the notorious dissolution of transition metal,which prevents the successful commercialization of ***,on the basis of energy level simulation,we present a high voltage resistant binder shielding strategy to address the challenging interfacial issue of *** strategy is to design a novel poly(γ-glutamic acid)-c-1H,1H,9H,9H-perfluoro-1,9-nonanediol(γ-PGFO)binder with superior transition metal chelating effect and well-matched energy level to guarantee fantastic interfacial *** is demonstrated that the dissolution of transition metal is significantly suppressed in the presence ofγ-PGFO binder,which excels in the *** is also noted that intramolecular hydrogen binding of the well-designed binder can generate powerful facial-contact binding,which is significant for a promising *** encapsulating this binder inside the cathode matrix,the Li Ni0.5Mn1.5O4electrode exhibits a capacity of 105.8 m Ah g^(-1)after 500cycles at 1 C with a capacity retention of 88.2%,which is significantly superior to that of polyvinylidene fluoride(PVDF)/Li Ni0.5Mn1.5O4electrode(a capacity of 82.9 m Ah g^(-1)and a capacity retention of 63.4%).The overall Coulombic efficiency ofγ-PGFO/Li Ni0.5Mn1.5O4electrode is prominently improved to be 99.1%,compared with 95.5%of PVDF *** presented results demonstrate a promising strategy of amino acid-based binder with strong transition metal chelating capability for boosting the rapid development of high voltage lithium ion battery.

关键词： LiNi0.5Mn1.5O4 cathode amino acid binder high voltage interfacial regulation

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Manipulating functional groups between polyvinylidene difluoride and nanoparticles for high-performance triboelectric nanogenerator

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Nano Research 2023年第9期16卷 11855-11861页

作者： Zekun Li Lu Zhang Lihao Guo Wenwen Hu Aifang Yu Junyi Zhai CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Advanced Materials and Nanotechnology Interdisciplinary Research Center of Smart SensorsXidian UniversityXi’an 712000China School of Aerospace Science and Technology Xidian UniversityXi’an 712000China

Interface functional groups play an essential role in regulating the electrical properties of bulk *** this work,we designed a novel strategy to explore a new way to enhance triboelectric performance by regulating the functional groups between nano-fillers and polymer matrix without obvious changes in the dielectric *** silica nanoparticles(SNPs)modified perfluoro-silane coupling agents(PFSCAs)with different chain lengths were added to the polyvinylidene difluoride to regulate the transferred charge density(TCD)of triboelectric nanogenerators(TENGs).When the doping concentration of perfluorodecyl modified SNPs is 2.25 wt.%,the nanocomposite film based TENG exhibits the maximum TCD of 166μC/m^(2)and power density of 3.12 W/m^(2)which are 6 times and 39 times as big as those of pure polyvinylidene difluoride(PVDF)*** charge accumulation and decay process show that interface functional groups dominate the performance of ***,a Fermi level model is proposed and why the TCD could be regulated by the concentration of nanoparticles in bulk materials is *** work provides a new concept for understanding the performance of TENG independent dielectric constant and points out a new direction for enhancing TENG’s performance,since wealthy functional groups with selectivity are applicable.

关键词： triboelectric nanogenerators functional groups surface modification interfacial regulation transferred charge density

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High efficiency photothermal cyclic self-healing antibacterial coating based on in-situ dual-functional BiOI@Bi_(2)S_(3)

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Journal of Materials Science & Technology 2024年第6期173卷 121-136页

作者： Huimeng Feng Tong Wang Wei Wang Chengcheng Ma Yanan Pu Shougang Chen School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

Although extremely challenging,it is highly desirable to develop self-healing materials that exhibit high efficiency under environmental conditions for marine protection *** this work,polyurethane elastomers with hydrogen bond and dimethylglyoxime-urethane(DOU)coordination complex were combined with in-situ dual-functional BiOI@Bi_(2)S_(3) to synthesize high-efficiency photothermal cyclic self-healing antibacterial *** photothermal efficiency of BiOI@Bi_(2)S_(3) is improved by 38% through interfacial ***@Bi_(2)S_(3)/PU rapidly rises by 50.2℃ within 300 s under near-infrared(NIR)light,which can trigger the hydrogen bond of polyurethane coating and recover the barrier properties of the coating through *** functional theory was used to simulate and analyze the generation of multiple electron transfer paths after the vulcanization of BiOI,which improves the interfacial mobility of photogenerated carriers and generates more ***,molecular dynamics verified the self-healing mechanism of hydrogen bond and the photothermal lifting mechanism of the *** 5th scratches and self-healing cycle tests,the coating has a self-healing efficiency of more than 80%,which can ensure the self-healing and anticorrosion protection performance of the coating for multiple *** photocatalytic and photothermal properties of BiOI@Bi_(2)S_(3) enhance the antibacterial rate of the coating up to 99%.This work provides heuristic perspectives for the design of coatings with anti-corrosion,antibacterial and self-healing properties.

关键词： Self-healing Photothermal interfacial regulation Dual-functional BiOI@Bi_(2)S_(3) Antibacterial

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Achieving stable K-storage performance of carbon sphere-confined Sb via electrolyte regulation

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Journal of Energy Chemistry 2023年第1期76卷 51-58,I0002页

作者： Ningning Chen Nailu Shen Xiaoping Yi Yinshuang Pang Jing Zheng Qingxue Lai Yanyu Liang Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016JiangsuChina School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Department of Chemistry and Materials Science College of ScienceNanjing Forestry UniversityNanjing 210037JiangsuChina

Potassium-ion batteries(PIBs)have been considered as one of the most promising alternatives to lithiumion batteries(LIBs)in view of their competitive energy density with significantly reduced product ***,alloy-type materials are expected as a high-performance anode of PIBs thanks to their intrinsic chemical stability as well as high theoretical specific ***,the serious incompatibility between alloy-type active materials and electrolytes,especially for the formation of unstable solidelectrolyte interfacial(SEI)films,often leads to insufficient cycle ***,the formation mechanism of SEI films in the K-storage systems based on carbon sphere confined Sb anode(Sb@CS)were investigated in commercially available *** characterizations and theoretical calculation revealed that the solvents in the dilute electrolyte of 0.8 M KPF_(6)/EC+DEC were excessively decomposed on the interface to generate unstable SEI and thus result in inferior K-storage *** the contrary,a salt-concentrated electrolyte(3 M KFSI/DME)can generate inorganic-dominated stable SEI due to the preferential decomposition of *** a result,the prepared Sb@CS in the matched 3 M KFSI/DME electrolyte delivered a high reversible capacity of 467.8 m A h g^(-1)after 100 cycles at 100 m A g^(-1),with a slow capacity decay of 0.19%per cycle from the 10th to the 100th *** findings are of great significance for revealing the interfacial reaction between electrodes and electrolytes as well as improving the stability of Sb-based anode materials for PIBs.

关键词： interfacial regulation Solid-electrolyte interface Sb-based alloy anode Electrolyte compatibility Potassium-ion batteries

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