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Alternative Strategy for Development of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑temperature Solid Oxide Fuel Cells

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Nano-Micro Letters 2025年第1期17卷 310-332页

作者： Sajid Rauf Muhammad Bilal Hanif Zuhra Tayyab Matej Veis MAKYousaf Shah Naveed Mushtaq Dmitry Medvedev Yibin Tian Chen Xia Martin Motola Bin Zhu College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University BratislavaIlkovicova684215 BratislavaSlovakia energy Storage Joint Research center School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Hydrogen energy Laboratory Ural Federal University620002 EkaterinburgRussia Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry620066 EkaterinburgRussia School of Microelectronics Hubei UniversityWuhan 430062People’s Republic of China

The development of low-temperature solid oxide fuel cells(LT-SOFCs)is of significant importance for realizing the widespread application of *** has stimulated a substantial materials research effort in developing high oxide-ion conductivity in the electrolyte layer of *** this context,for the first time,a dielectric material,CaCu_(3)Ti_(4)O_(12)(CCTO)is designed for LT-SOFCs electrolyte application in this *** individual CCTO and its heterostructure materials with a p-type Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ)(NCAL)semiconductor are evaluated as alternative electrolytes in LT-SOFC at 450–550℃.The single cell with the individual CCTO electrolyte exhibits a power output of approximately 263 mW cm^(-2) and an open-circuit voltage(OCV)of 0.95 V at 550℃,while the cell with the CCTO–NCAL heterostructure electrolyte capably delivers an improved power output of approximately 605 mW cm^(-2) along with a higher OCV over 1.0 V,which indicates the introduction of high hole-conducting NCAL into the CCTO could enhance the cell performance rather than inducing any potential short-circuiting *** is found that these promising outcomes are due to the interplay of the dielectric material,its structure,and overall properties that led to improve electrochemical mechanism in CCTO–***,density functional theory calculations provide the detailed information about the electronic and structural properties of the CCTO and NCAL and their heterostructure CCTO–*** study thus provides a new approach for developing new advanced electrolytes for LT-SOFCs.

关键词： LT-SOFCs Dielectric CaCu_(3)Ti_(4)O_(12) Semiconductor Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ) Ionic conductivity Heterostructure electrolyte

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Constructing Donor–Acceptor‑Linked COFs Electrolytes to Regulate Electron Density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

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Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang Ma Conghui Zhang Yongxin Yang Shuyuan Yu Haiye Zhu Yongjiang Sun Hong Guo School of materials and energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua Co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

Regulation the electronic density of solid-state electrolyte by donor–acceptor(D–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough D–A-linked covalent organic frameworks(COFs)based on intramolecular charge transfer *** other reported COFbased solid-state electrolyte,the developed concept with D–A-linked COFs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity F-based ligand in COF electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LiFePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding D–A interaction between donor porphyrin and acceptor F atoms,which effectively expedites electron transferring from porphyrin to F-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through D–A system.

关键词： Electronic modulation engineering Donor-acceptor-linked covalent organic frameworks Quasi-solid-state Li metal battery

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Photo‑Energized MoS_(2)/CNT Cathode for high‑Performance Li–CO_(2)Batteries in a Wide‑temperature Range

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Nano-Micro Letters 2025年第1期17卷 160-175页

作者： Tingsong Hu Wenyi Lian Kang Hu Qiuju Li Xueliang Cui Tengyu Yao Laifa Shen Jiangsu Key Laboratory of materials and Technologies for energy Storage College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China

Li–CO_(2) batteries are considered promising energy storage systems in extreme environments such as Mars;however,severe performance degradation will occur at a subzero temperature owning to the sluggish reaction ***,a photo-energized strategy adopting sustainable solar energy in wide working temperature range Li–CO_(2) battery was achieved with a binder-free MoS_(2)/carbon nanotube(CNT)photo-electrode as *** unique layered structure and excellent photoelectric properties of MoS_(2) facilitate the abundant generation and rapid transfer of photo-excited carriers,which accelerate the CO_(2) reduction and Li_(2)CO_(3) decomposition upon *** illuminated battery at room temperature exhibited high discharge voltage of 2.95 V and mitigated charge voltage of 3.27 V,attaining superior energy efficiency of 90.2%and excellent cycling stability of over 120 *** at an extremely low temperature of−30℃,the battery with same electrolyte can still deliver a small polarization of 0.45 V by the photoelectric and photothermal synergistic mechanism of MoS_(2)/CNT *** work demonstrates the promising potential of the photo-energized wide working temperature range Li–CO_(2) battery in addressing the obstacle of charge overpotential and energy efficiency.

关键词： Li-CO_(2)batteries Photo-energized Wide operation-temperature Kinetics MoS_(2)

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Magnetic force microscope study on anisotropic NdFeB permanent magnets

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中国有色金属学会会刊：英文版 2003年第6期13卷 1410-1414页

作者：刘薇蒋建华吴建生李刚 Key Laboratory of State Education Ministry for high temperature materials and Testing Instrumental Analysis center

NdFeB permanent magnets prepared by powder metallurgy were investigated using magnetic force microscopy (MFM). The excellent MFM images of sample along the surfaces parallel and perpendicular to the alignment axis were collected respectively. The results show the necessity of annealing procedure in the preparation of the samples to remove the polishing surface stress and to illustrate the real magnetic domain structure, so that the much information about both the magnetic structure and the topographic microstructure is obtained. The hard MFM tip is verified to be effective for this material especially for the sample with the examined surface parallel to alignment axis. By analyzing these well-captured magnetic force images, magnetic domains and alignment degree as well as the topographic information such as grain size and the nonmagnetic phases at the grain boundaries were demonstrated.

关键词： NdFeB 永磁体永磁材料磁力显微镜各向异性

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Forming and growing mechanisms of homogenization-solution pores in a single crystal superalloy

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Rare Metals 2018年第5期37卷 399-406页

作者： Xiao-Dai Yue Jia-Rong Li Xiao-Guang Wang Zhen-Xue Shi Science and Technology on Advanced high temperature Structural materials Laboratory Beijing Institute of Aeronautical Materials

The forming and growing mechanisms of homogenization-solution pores in a single crystal superalloy were investigated. The microstructures were observed with optical microscope （OM） and field emission microscope （FEM） after homogenization-solution heat treated at 1328℃ and 1350 ℃ for 2 h, 6 h and 9 h. Results indicate that when heat treated at 1328 ℃, pores appear at the interface of eutectic and matrix at first and then leave in the matrix with the shrink of eutectic. When heat treated at 1350 ℃, incipient melting happens at first, and some of them have a pore in the center. After that, with the homogenization-solution process, incipient melting microstructure fades away gradually. By analyzing the results with thermodynamics and kinetics methods, it is concluded that some pores nucleate during directional solidification and then become larger and visible during homogenization-solution heat treatments; some pores are generated by incipient melting, yet such pores are difficult to be distinguished from other pores; imbalanced elements cross-diffusion induces to the forming and growing of pores too, and such imbalanced diffusion also plays an important part on the growth of all preexisting pores.

关键词： Single crystal superalloy Pore Homogenization Solution Heat treatment Incipient melting

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Influence of yttrium addition on high temperature oxidation resistance of single crystal superalloy

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Journal of Rare Earths 2013年第8期31卷 795-799页

作者：史振学刘世忠韩梅李嘉荣 Science and Technology on Advanced high temperature Structural materials Laboratory Beijing Institute of Aeronautical Materials

Two experimental single crystal superalloys Y-free alloy and Y-containing alloy were cast in the directionally solidified furnace, while other alloying element contents were basically kept unchanged. The isothermal oxidation behavior of two single crystal superalloy was studied at 1100 ℃ in ambient atmosphere. Morphology of oxides was examined by scanning electron microscopy （SEM） and their compostion was analyzed by X-ray diffraction （XRD） and energy dispersive spectroscopy （EDS）. The effect of yt- trium on the high temperature oxidation resistance of the single crystal superalloy was investigated. The results showed that the oxi- dation resistance of Ni-base single crystal superalloy was substantially improved by adding a little amount of rare earth yttrium. Yt- trium could promote the oxide of A1 formation and decreased the proportion of NiO. Yttrium increased the coherence between the oxide scale and the alloy substrate to decrease the spallation of oxide scale. Yttrium reduced the oxide grain size and the thickness of oxide layer.

关键词： single crystal superalloy yttrium high temperature oxidation rare earths

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Sulfolane‑Based Flame‑Retardant Electrolyte for high‑Voltage Sodium‑Ion Batteries

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Nano-Micro Letters 2025年第2期17卷 498-516页

作者： Xuanlong He Jie Peng Qingyun Lin Meng Li Weibin Chen Pei Liu Tao Huang Zhencheng Huang Yuying Liu Jiaojiao Deng Shenghua Ye Xuming Yang Xiangzhong Ren Xiaoping Ouyang Jianhong Liu Biwei Xiao Jiangtao Hu Qianling Zhang Graphene Composite Research center College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China center of Electron Microscopy State Key Laboratory of Silicon and Advanced Semiconductor MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China GRINM(Guangdong)Research Institute for Advanced materials and Technology FoshanGuangdong 528051People’s Republic of China College of energy Engineering Zhejiang UniversityHangzhouZhejiang 310027People’s Republic of China School of materials Science and Engineering Xiangtan UniversityXiangtan 411105People’s Republic of China Shenzhen Eigen-Equation Graphene Technology Co.Ltd Shenzhen 518000People’s Republic of China

Sodium-ion batteries hold great promise as next-generation energy storage ***,the high instability of the electrode/electrolyte interphase during cycling has seriously hindered the development of *** particular,an unstable cathode–electrolyte interphase(CEI)leads to successive electrolyte side reactions,transition metal leaching and rapid capacity decay,which tends to be exacerbated under high-voltage ***,constructing dense and stable CEIs are crucial for high-performance *** work reports localized high-concentration electrolyte by incorporating a highly oxidation-resistant sulfolane solvent with non-solvent diluent 1H,1H,5H-octafluoropentyl-1,1,2,2-tetrafluoroethyl ether,which exhibited excellent oxidative stability and was able to form thin,dense and homogeneous *** excellent CEI enabled the O3-type layered oxide cathode NaNi_(1/3)Mn_(1/3)Fe_(1/3)O_(2)(NaNMF)to achieve stable cycling,with a capacity retention of 79.48%after 300 cycles at 1 C and 81.15%after 400 cycles at 2 C with a high charging voltage of 4.2 *** addition,its nonflammable nature enhances the safety of *** work provides a viable pathway for the application of sulfolane-based electrolytes on SIBs and the design of next-generation high-voltage electrolytes.

关键词： Sodium-ion batteries Sulfolane-based electrolyte high voltage Layered oxide cathode Flame retardant

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Effects of Ru on Solidification Characteristic and Microstructures of Ni-Based Single Crystal Superalloy

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Journal of Iron and Steel Research International 2013年第3期20卷 74-78页

作者： SHI Zhen-xue LI Jia-rong LIU Shi-zhong WANG Xiao-guang YUE Xiao-dai Science and Technology on Advanced high temperature Structural materials Laboratory Beijing Institute of Aeronautical Materials

The Ru-free and Ru-containing single crystal superalloys were cast in the directionally solidified furnace,while other alloying element contents were basically kept *** effects of Ru on the solidification characteristic and microstructures of single crystal superalloy were investigated with differential scanning calorimetry,electron probe micro analyzer,energy-dispersive X-ray spectroscope,scanning electron microscope and transmission electron *** results show that the liquidus temperature of the single crystal superalloy decreases with Ru *** primary dendrite arm spacing and volume fraction of γ/γ＇ eutectic both decrease with Ru *** sizes of γ＇ phase of dendritic core and interdendritic region have no obvious change with Ru *** tends to segregate slightly in the dendritic *** extent of elements segregation decreases with the Ru *** tends to partition preferentially into the γ *** addition of Ru decreases the partition ratio（the ratio of the γ phases composition over the γ＇ phases composition） of elements Re,W and Mo.

关键词： Ru single crystal superalloy solidification microstructure

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Coarsening behavior of γ' and γ'' phases in GH4169 superalloy by electric field treatment

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International Journal of Minerals,Metallurgy and materials 2013年第9期20卷 861-866页

作者： Lei Wang Yao Wang Yang Liu Xiu Song Xu-dong Lü Bei-jiang Zhang Key Laboratory for Anisotropy and Texture of materials Northeastern University Department of high-temperature materials Central Iron and Steel Research Institute

The coarsening behaviors of γ′ and γ″ phases in GH4169 alloy aged at 1023 and 1073 K with electric field treatment （EFT） were investigated by transmission electron microscopy （TEM） and positron annihilation lifetime spectroscopy （PALS）. It is demonstrated that precipitation coarsening occurs, and the growth activation energies of γ′ and γ″phases can be decreased to 115.6 and 198.1 ***1-1, respectively, by applying the electric field. The formation of a large number of vacancies in the matrix is induced by EFT. Due to the occurrence of vacancy migration, the diffusion coefficients of A1 and Nb atoms are increased to be 1.6-5.0 times larger than those without EFT at 1023 or 1073 K. Furthermore, the formation of vacancy clusters is promoted by EFT, and the increase in strain energy for the coarsening of γ′ and γ″ phases can be counterbalanced by the formation of vacancy clusters.

关键词： superalloys nickel alloys precipitation electric fields aging vacancies

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Effect of trace Ce and B additions on the microstructure of Nb-3Si-22Ti alloys

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Progress in Natural Science:materials International 2017年第3期27卷 362-368页

作者： Meiling Wu Liwu Jiang Shiyu Qu Fengwei Guo Ming Li Yongwang Kang Yafang Han Science & Technology on Advanced high temperature Structural materials Laboratory AECC Beijing Institute of Aeronautical Materials National center for materials Service Safety University of Science and Technology Beijing

The effects of trace Ce and B additions on the microstructure Nb-22Ti-3Si alloys were *** microstructure of the alloys was observed by scanning electron microscope（SEM）,and their phase compositions were analyzed with X-ray diffraction（XRD） and Electro-Probe micro-analyzer（EPMA）.The distributions of the elements were detected by Spectrum *** interface of the phases in the alloys was investigated by transmission electron microscopy（TEM）.The results indicated that two phases of Nbss and Nb;Si presented in Nb-22Ti-3Si,Nb-22Ti-3Si-0.2Ce and Nb-22Ti-3Si-0.2B *** segregation of Ti at the interface between Nbss and Nb;Si was promoted and the volume fraction of silicides in the alloy increased with the trace B and Ce addition to the Nb-22Ti-3Si alloy *** there was no single and definite orientation relationship between Nb;Si and Nbss in Nb-22Ti-3Si,Nb-22Ti-3Si-0.2Ce and Nb-22Ti-3Si-0.2B *** with the Nb-22Ti-3Si alloy,the Nbss superlattice structure was found in Nb-22Ti-3Si-0.2Ce and Nb-22Ti-3Si-0.2B alloys.

关键词： Nb-3Si-22Ti alloy Nb3Si Ce B Microstructure Phase interface Superlattice

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