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Achieving structurally stable O3-type layered oxide cathodes through site-specific cation-anion co-substitution for sodium-ion batteries

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Journal of Energy Chemistry 2024年第6期93卷 411-418,I0011页

作者： yihao shen Chen Cheng Xiao Xia Lei Wang Xi Zhou Pan Zeng Jianrong Zeng Liang Zhang Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123JiangsuChina Institute for Advanced Study School of Mechanical EngineeringChengdu UniversityChengdu 610106SichuanChina Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123JiangsuChina

O3-type layered oxides have garnered great attention as cathode materials for sodium-ion batteries because of their abundant reserves and high theoretical ***,challenges persist in the form of uncontrollable phase transitions and intricate Na^(+)diffusion pathways during cycling,resulting in compromised structural stability and reduced capacity over *** study introduces a special approach employing site-specific Ca/F co-substitution within the layered structure of O_(3)-NaNi_(0.5)Mn_(0.5)O_(2) to effectively address these ***,the strategically site-specific doping of Ca into Na sites and F into O sites not only expands the Na^(+)diffusion pathways but also orchestrates a mild phase transition by suppressing the Na^(+)/vacancy ordering and providing strong metal-oxygen bonding strength,*** as-synthesized Na_(0.95)Ca_(0.05)Ni_(0.5)Mn_(0.5)O_(1.95)F_(0.05)(NNMO-CaF)exhibits a mild O3→O3+O'3→P3 phase transition with minimized interlayer distance variation,leading to enhanced structural integrity and stability over extended *** a result,NNMO-CaF delivers a high specific capacity of 119.5 mA h g^(-1)at a current density of 120 mA g^(-1)with a capacity retention of 87.1%after 100 *** study presents a promising strategy to mitigate the challenges posed by multiple phase transitions and augment Na^(+)diffusion kinetics,thus paving the way for high-performance layered cathode materials in sodium-ion batteries.

关键词： Sodium-ion batteries O3-type layered oxides Site-specific co-doping Phase transition

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公共产品、身份和能力:北约干预俄乌冲突的集体行动逻辑

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欧洲研究 2024年第3期42卷 53-81,I0003,I0004页

作者：王思羽沈亦豪上海外国语大学上海全球治理与区域国别研究院上海外国语大学国际关系学院

北约针对2022年的俄乌冲突采取了强化自身集体防御和激励间接干预的双向策略。本文基于国际政治经济学、政治学和军事战略学视角的折中主义分析框架,分别通过安全公共产品、身份、能力三个因素对北约的集体行动展开分析。在公共产品层面... 详细信息

北约针对2022年的俄乌冲突采取了强化自身集体防御和激励间接干预的双向策略。本文基于国际政治经济学、政治学和军事战略学视角的折中主义分析框架,分别通过安全公共产品、身份、能力三个因素对北约的集体行动展开分析。在公共产品层面,成员整体供给意愿较高,供给过程遵循边际成本规律和林达尔均衡,使集体行动的困境相较之前得到缓解。在身份认知层面,北约通过利用“跨大西洋安全社区”等身份符号,框定了乌克兰的伙伴身份,强化了内部的集体决策共识和对外干预韧性,将意识形态转变为对外干预的内部增压器。在能力聚合层面,北约基于专门为乌克兰搭建的制度系统,在美国主导的“智能防御”概念引导下,强化各成员国在干预行动中的战略依托性、战术兼容性和责任模糊性。结果表明,北约为了最大限度地塑造对其有利的态势,采取了系统性的干预行动,对内部整合、干预手段进行调整,这对联盟自身变革和俄乌冲突都产生了重要影响。

关键词：北约俄乌冲突安全公共产品身份政治集体行动

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Structure and magnetostriction of high Pr/Ce-content(Tb_(0.2)Pr_(0.8))_(1-x)Ce_(x)Fe_(1.93) Laves compounds

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Journal of Rare Earths 2022年第4期40卷 670-675,I0006页

作者： yihao shen Jinjun Liu Qilin Ding Mingkun Wang Zhongbin Pan Juan Du Faculty of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China

The light rare earth Pr/Ce-contained(Tb_(0.2)Pr_(0.8))_(1–x)Ce_(x)Fe_(1.93)(0≤x≤1.0)intermetallics were arc melted and magnetoelastic properties were *** compounds of x≥0.40 are found to stabilize at ambient pressure in a single Laves phase with MgCu2-type C15 structure,which is attributed to the strong Ce 4f *** mixed-valence behavior,with a support of the deviation from the linear Vegard’s law for both lattice parameter a and saturation magnetization M_(S),is observed at room *** easy magnetization direction(EMD)was determined by the analysis of XRD on both magnetically aligned samples and the(440)splitting,that is,EMD lies towardaxis for x≤0.50 rotating tofor x=0.60,accompanied with the structural distortion from rhombohedral to *** substitution of Ce for Tb/Pr is conductive to the reduction of magnetocrystalline anisotropy,giving rise to an improvement of the low-field *** excellent magnetoelastic properties can be tailored by the Ce introduction,e.g.,the spontaneous magnetostriction coefficient λ_(111) as large as 1150×10^(−6) for x=0.40,and the low-field induced magnetostriction achieving a high value of λ_(a)=180×10^(−6) at 80 kA/m for x=*** excellent magnetoelastic properties and the combination in high Pr-content with low cost,suggest promising prospects in applications.

关键词： Light rare earth Intermetallics Laves phase X-ray diffraction Magnetic properties Magnetostriction

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Al5052-CFRP同轴单边电阻点焊的数值分析

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电焊机 2024年第8期54卷 44-49页

作者：任森栋陈浩沈毅豪杨建国浙江工业大学机械工程学院浙江杭州310014

文中提出了一种新型的同轴单边电阻点焊技术用于连接Al5052和碳纤维增强复合材料(CFRP)。基于内部有限元代码JWRIAN-RSW对同轴单边电阻点焊的“电-热-力”耦合过程进行数值建模,预测焊接热循环与温度分布并进行了实验验证。采用十字拉... 详细信息

文中提出了一种新型的同轴单边电阻点焊技术用于连接Al5052和碳纤维增强复合材料(CFRP)。基于内部有限元代码JWRIAN-RSW对同轴单边电阻点焊的“电-热-力”耦合过程进行数值建模,预测焊接热循环与温度分布并进行了实验验证。采用十字拉伸实验评价了接头的力学性能,分析了焊接参数对连接强度、失效行为和界面特征的影响。讨论了同轴单边电阻点焊熔化区尺寸的生长过程与机理。结果表明,实验测得的焊接热循环与数值预测结果吻合较好,证明了所开发的数值模型的有效性;焊接接头呈现出两种断裂模式:焊接电流较小时,连接强度较弱,接头沿Al5052-CFRP界面失效,呈现出脆性断裂的特征,最大载荷约为170 N,焊接电流较大时,局部失效发生在CFRP基体,接头呈现出韧性断裂特征,力学性能大幅提升,载荷峰值提升至1335 N。此外,Al5052-CFRP同轴单边电阻点焊的熔化区在冷却阶段初期仍会持续增长。因此,对同轴单边电阻点焊的数值建模必须考虑到冷却阶段,通过峰值温度分布来预测熔化区的尺寸。

关键词： CFRP 同轴单边电阻点焊数值仿真温度场焊接参数

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EMPSI:Efficient multiparty private set intersection(with cardinality)

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Frontiers of Computer Science 2024年第1期18卷 199-213页

作者： Yunbo YANG Xiaolei DONG Zhenfu CAO Jiachen shen Ruofan LI yihao YANG Shangmin DOU Shanghai Key Laboratory of Trustworthy Computing East China Normal UniversityShanghai 200062China Kunyao Academy of Shanghai Kunyao Network Technology Co. Ltd.Shanghai 201203China PwC US Advisory Shanghai AC Shanghai 200233China

Multiparty private set intersection(PSI)allows several parties,each holding a set of elements,to jointly compute the intersection without leaking any additional *** the development of cloud computing,PSI has a wide range of applications in privacy ***,it is complex to build an efficient and reliable scheme to protect user *** address this issue,we propose EMPSI,an efficient PSI(with cardinality)protocol in a multiparty *** avoids using heavy cryptographic primitives(mainly rely on symmetric-key encryption)to achieve better *** addition,both PSI and PSI with the cardinality of EMPSI are secure against semi-honest adversaries and allow any number of colluding clients(at least one honest client).We also do experiments to compare EMPSI with some state-of-the-art *** experimental results show that proposed EMPSI(-CA)has better performance and is scalable in the number of clients and the set size.

关键词： intersection cardinal primitive

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Optimization of synergistic energy storage density and efficiency for eco-friendly (Na_(0.5)Bi_(0.5))_(0.6)Sr_(0.4)TiO_(3)-based relaxor ferroelectric ceramics

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Journal of Materiomics 2021年第4期7卷 869-878页

作者： Hu Di Pan Zhongbin Wu Lukang Yang Fan Tang Luomeng Zhao Jinghao shen yihao Chen Yuyun Li Peng Zhai Jiwei Liu Jinjun School of Materials Science and Chemical Engineering Ningbo UniversityNingboZhejiang315211China Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi University for NationalitiesNanning530006China School of Materials Science and Engineering Liaocheng UniversityLiaocheng252059China School of Materials Science&Engineering Tongji University4800 Caoan RoadShanghai201804China

Inspired by increasing demand of advanced pulsed power capacitors,the development of lead-free dielectric ceramic capacitors with high energy storage density and temperature-insensitive performance are extremely ***,the lead-free relaxor ferroelectric ceramics based on(1-x)(Na_(0.5)Bi_(0.5))0.6Sr_(0.4)TiO_(3-x)Sr_(0.7)La_(0.2)ZrO_(3)[abbreviated as(1-x)NBST-xSLZ]are prepared by the solid-state reaction *** large recoverable energy density(Wrec)of 3.45 J/cm^(3) and efficiency(h)of 90.1%are simultaneously realized in 0.86NBST-0.14SLZ ceramic due to increased breakdown ***,both the Wrec and h of 0.86NBST-0.14SLZ ceramic display superior of thermal stability(20e180C),frequency stability(1e1000 Hz),and cycle stability(10^(4))within a satisfactory range of *** addition,the 0.86NBST-0.14SLZ ceramic can also achieve a large current density(CD)of 625 A/cm^(2),an ultrahigh power density(PD)of 50 MW/cm^(3) and a fast discharge rate(t0.90)of 160.8 ns at 160 kV/*** results demonstrate that the 0.86NBST-0.14SLZ ceramic could be a highly competitive and ecofriendly relaxor ferroelectric material for next-generation pulsed power capacitors.

关键词： Lead-free ceramics Energy storage density (Na_(0.5)Bi_(0.5))_(0.6)Sr_(0.4)TiO_(3) Thermal stability Power density

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Manipulating Na occupation and constructing protective film of P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2) as long-term cycle stability cathode for sodium-ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 603-611,I0013页

作者： Yiran Sun Pengfei Zhou Siyu Liu Zhongjun Zhao yihao Pan Xiangyan shen Xiaozhong Wu Jinping Zhao Junying Weng Jin Zhou School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 0255000ShandongChina School of Materials Science and Engineering Shandong University of TechnologyZibo 255049ShandongChina

P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2)(NNMO)is promising cathode material for sodium-ion batteries(SIBs)due to its high specific capacity and fast Na+diffusion ***,the irreversible P2-O_(2)phase transformation,Na+/vacancy ordering,and transition metal(TM)dissolution seriously damage its cycling stability and restrict its commercialization ***,Na occupation manipulation and interface stabilization are proposed to strengthen the phase structure of NNMO by synergistic Zn/Ti co-doping and introducing lithium difluorophosp(LiPO_(2)F_(2))film-forming electrolyte *** Zn/Ti co-doping regulates the occupancy ratio of Nae/Nafat Na sites and disorganizes the Na+/vacancy ordering,resulting in a faster Na+diffusion kinetics and reversible P2-Z phase transition for P2-Na_(0.67)Ni_(0.28)Zn_(0.05)Mn_(0.62)Ti_(0.05)O_(2)(NNZMTO).Meanwhile,the LiPO_(2)F_(2)additive can form homogeneous and ultrathin cathode-electrolyte interphase(CEI)on NNZMTO surface,which can stabilize the NNZMTO-electrolyte interface to prevent TM dissolution,surface structure transformation,and micro-crack *** studies of in situ and ex situ characterizations and theoretical calculations were used to elucidate the storage mechanism of NNZMTO with Li PO_(2)F_(2)*** a result,the NNZMTO displays outstanding capacity retention of 94.44%after 500 cycles at 1C with 0.3 wt%Li PO_(2)F_(2),excellent rate performance of 92.5 mA h g^(-1)at 8C with 0.1 wt%Li PO_(2)F_(2),and remarkable full cell *** work highlights the important role of manipulating Na occupation and constructing protective film in the design of layered materials,which provides a promising direction for developing high-performance cathodes for SIBs.

关键词： Layered cathode Zn/Ti co-doping Na occupation Electrolyte additive Sodium-ion batteries

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Deep Exploration of Bifidobacteria through Metabolomics Study

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Journal of Biosciences and Medicines 2018年第5期6卷 57-62页

作者： Juan Li Yatao Jiang yihao shen Qingzhi Li Zhongke Sun Institute of Food and Drug Inspection College of Life Sciences and Agronomy Zhoukou Normal University Zhoukou China Library of Zhoukou Normal University Zhoukou China

Bifidobacteria are probiotic bacteria with multiple health-promoting properties for human being. The global market for probiotics, especially for bifidobacteria is booming. However, the entire market is still at an early stage as there is nearly no fine products developed yet except the whole bacterial cells. The maturation of metabolomics technologies make it possible to study complex mixture with high-throughput, comprehensive maps and libraries. Therefore, we prospect that metabolomics studies mainly based on liquid/gas chromatography-mass spectrometry (LC/GC-MS) can deepen our understanding in detail during the study of metabolic mechanisms of bifidobacteria. These studies can be conducted at three phases, including non-targeted, targeted metabolomic analysis of bifidobacteria, and specific metabolites production through metabolic engineering and fermentation. Metabolomic studies of bifidobacteria will allow us to fully explore their metabolic mechanisms and to utilize metabolites that contribute to human health. In particular, bifidobacteria derived conjugated linoleic acids and bacteriocins are two kinds of fined products that may have great potentials in the future and can be used as food additives.

关键词： Bifidobacteria Metabolomics Metabolites Conjugated Linoleic Acid Probiotics Derived Fine Products

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Bioinformatic Survey of S-Layer Proteins in Bifidobacteria

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Computational Molecular Bioscience 2018年第2期8卷 68-79页

作者： Juan Li yihao shen Yatao Jiang Le He Zhongke Sun Institute of Food and Drug Inspection College of Life Sciences and Agronomy Zhoukou Normal University Zhoukou China Library of Zhoukou Normal University Zhoukou China

Surface layer (S-layer) proteins are one of the most commonly observed cell envelope components in both Archaea and Bacteria. It has versatile functions and holds considerable application potential in biotechnology. Bifidobacteria are representative probiotics conferring health promoting properties. However, there is little study of S-layer in bifidobacteria yet. The distribution and characteristics of S-layer in bifidobacteria are unknown. In this study, search for S-layer protein in the identical protein groups in NCBI yielded 49 hits belonging to bifidobacteria. These proteins were annotated as either “S-layer (domain) protein” or “putative S-layer (y) domain protein” that distributed among 26 species of Bifidobacterium genus. Multiple alignments suggest S-layer proteins are relatively conservative. Phylogenetic analysis of 24 S-layer (domain) protein sequences groups them into three distinct clusters, with the majority species in Cluster-2. S-layer (domain) protein has a universe motif DUF4381, though its function is unknown. Meanwhile, two other motifs CARDB and EphA2_TM involved in cell adhesion and cell signaling respectively, presented in most S-layer (domain) protein in bifidobacteria. All S-layer proteins have a typical N-terminal Sec-dependent signal peptide and a C-terminal trans-membrane region. Homological modeling of representative S-layer proteins from each cluster revealed a few unique structural features. All representative S-layer proteins have a plenty of β-meander motif that exclusively composed by β-barrel structural architectures linked together by hairpin loops.

关键词： Bifidobacteria S-layer Domain Protein Phylogeny Homology Modeling Domain

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碳量子点/TiO_(2)复合光催化剂的制备和应用进展

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化工技术与开发 2024年第6期53卷 47-52,61页

作者：赵斌沈谊豪周雨洁肖智中李静雯纪星竹于子轩王志有辽宁科技大学化学工程学院辽宁鞍山114051

本文主要综述了碳量子点/TiO_(2)复合光催化剂的制备方法,以及近5年碳量子点/TiO_(2)复合光催化剂在光催化降解有机污染物、杀菌、制氢及太阳能电池制备等方面的应用进展,以期为碳量子点/TiO_(2)复合光催化剂制备及应用的进一步研究提... 详细信息

本文主要综述了碳量子点/TiO_(2)复合光催化剂的制备方法,以及近5年碳量子点/TiO_(2)复合光催化剂在光催化降解有机污染物、杀菌、制氢及太阳能电池制备等方面的应用进展,以期为碳量子点/TiO_(2)复合光催化剂制备及应用的进一步研究提供参考。

关键词：碳量子点/TiO_(2) 光催化制备方法应用进展

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