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Promoting ion adsorption and desolvation kinetics enables high capacity and rate capability of stibium anode for advanced alkaline battery

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Journal of Materials Science & Technology 2022年第36期131卷 60-67页

作者： Peng Zhang Jinhao Xie Fan Yang xin Shi Yanxia Yu Xihong Lu College of Materials Science and Engineering Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad LaminateDongguan Cleaner Production CenterDongguan University of TechnologyDongguan 523808China MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low-carbon Chem and Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China

Stibium(Sb)metal with high theoretic capacity,suitable negative working window and inexpensive nature are promising anode material for advanced aqueous alkaline batteries(AABs).However,the further development of Sb anode is severely hindered by the low capacity and poor rate capability which is originated from deficient adsorption of[Sb(OH)_(4)]^(-)and its sluggish desolvation ***,a nitrogen doped carbon cages(NCCs)substrate is constructed as high capacity and rate capability anode by promoting the adsorption and following desolvation process of[Sb(OH)_(4)]^(-)via the enhanced attraction toward(OH)-in the solvated[Sb(OH)_(4)]^(-).Consequently,the designed Sb/NCCs anode delivers a high capacity of 627 m Ah g^(-1)with an average 95%Sb utilization,an outstanding coulombic efficiency(CE)of 95%and an impressive lifespan(>110 h).Meanwhile,the Ni_(3)Se_(2)//Sb/NCCs batteries show great capacity retention of 86.7%after 2000 cycles with an areal capacity of 0.52 m Ah cm^(-2).Implementation of the designed anode allows for the construction of Sb-based AABs with enhanced rate capability,energy density and cycling performance.

关键词： Aqueous alkaline batteries Stibium anode N-doped carbon Ion adsorption Desolvation kinetics

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Grapevine-like high entropy oxide composites boost high-performance lithium sulfur batteries as bifunctional interlayers

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Green Energy & Environment 2024年第3期9卷 565-572页

作者： Huarong Fan Yubing Si Yiming Zhang Fulong Zhu xin Wang Yongzhu Fu College of Chemistry and Center of Green Catalysis Zhengzhou UniversityZhengzhou450001China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu611731China

Lithium-sulfur batteries(LSBs)with high energy densities have been demonstrated the potential for energy-intensive demand ***,their commercial applicability is hampered by hysteretic electrode reaction kinetics and the shuttle effect of lithium polysulfides(LiPSs).In this work,an interlayer consisting of high-entropy metal oxide(Cu_(0.7)Fe_(0.6)Mn_(0.4)Ni_(0.6)Sn_(0.5))O_(4) grown on carbon nanofibers(HEO/CNFs)is designed for *** CNFs with highly porous networks provide transport pathways for Li^(+) and e^(-),as well as a physical sieve effect to limit LiPSs *** particular,the grapevine-like HEO nanoparticles generate metal-sulfur bonds with LiPSs,efficiently anchoring active *** unique structure and function of the interlayer enable the LSBs with superior electrochemical performance,i.e.,the high specific capacity of 1381 mAh g^(-1) at 0.1 C and 561 mAh g^(-1) at 6 *** work presents a facile strategy for exploiting high-performance LSBs.

关键词： Electrospun carbon nanofibers Grapevine-like morphology Hierarchical physical sieve effect High-entropy induced chemisorption Lithium-sulfur battery

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Study of K^+ doping on structure and properties of γ-Ce_2S_3

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Journal of Rare Earths 2020年第7期38卷 776-783,I0004页

作者： xin Li Yueming Li Fusheng Song Zhumei Wang Yan Hong Zhike Li School of Materials Science and Engineering Jingdezhen Ceramic InstituteJingdezhen 333403China National Light Industry Key Laboratory of Functional Ceramic Materials Jingdezhen 333403China Energy Storage and Conversion Ceramic Materials Engineering Laboratory of Jiangxi Province Jingdezhen 333403China

In this study,K+-doped γ-Ce2 S3 was successfully prepared via a gas-solid reaction method using CeO2,K2 CO3,and CS2 as raw *** effects of the suitable sulfide system and different molar ratios of K to Ce(nK/Ce=0-0.30) on the phase composition,crystal structure,chromaticity and thermal stability ofγ-Ce2 S3 were systematically *** γ-Ce2 S3 was obtained by calcining the doped samples at840℃ for 150 *** calcination at the same temperature the undoped K+samples exhibit a pure α-*** with a K/Ce molar ratio(nK/Ce) of 0.10-0.25 comprise only the γ-phase;and when nK/Ce exceeds 0.25,a new heterogeneous phase,KCeS2,*** values of nK/Ce in the range of0-0.25,the γ-Ce2 S3 lattice parameters gradually increases with increasing K+ *** nK/Ceexceedes 0.25,the lattice parameters remains *** nK/Ce increased,the synthesized color gradually changes from red to orange—red and finally,to *** redness value a* reaches the maximum(L*=33.86,a*=36.68,b*=38.15) when nK/Ce=0.10,The nK/Ce=0.10 composition continues to exhibit the y-phase after heat treatment at 420℃ for 10 min in *** K+doping fills the internal vacancies of γ-Ce2 S3 and formed a solid solution,which is beneficial for the stability of its lattice,thus improving the thermal stability of γ-Ce2 S3(from 350 to 420℃).

关键词： γ-Ce2S3 Crystal structure Chromaticity Thermal stability Potassium ion doping Rare earths

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Effect of gap and overlap on mode Ⅱ interlaminar fracture toughness of automated fiber placement prepreg laminates

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Chinese Journal of Aeronautics 2023年第6期36卷 390-401页

作者： Fan ZHANG xin LIU Yaoyao YE Qisen CHEN Qiang XU Yunbo BI China State Key Laboratory of Fluid Power and Mechatronic System School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China

Automated Fiber Placement(AFP)technology facilitates the manufacturing process of composite structures with complex geometry owing to its high efficiency and *** unavoidable imperfections induced by the automated layup method bring challenges to the stability of the final mechanical properties of *** influence of AFP-induced gaps and overlaps on the modeⅡinterlaminar fracture process of oven-cured laminates is experimentally investigated and explicitly ***-Notched Flexure(ENF)tests were performed to measure the interlaminar fracture toughness of unidirectional laminates under three different defect configurations,namely"Gap""Overlap"and"Gap&Overlap".A marginal decline(about-1.2%in non-precracked tests,-5.1%in precracked tests)and an obvious increase(about 15.2%in nonprecracked tests,5.2%in precracked tests)in fracture toughness were observed for the"Gap"group and the"Overlap"group,*** studies which involve the metallographic observation and Scanning Electron Microscopy(SEM)observation revealed that the increases in fracture area and crack length helped improve the fracture toughness of the Overlap"***,the resin-rich area with high porosity induced by gaps was detrimental to the delamination *** capture the interlaminar stress distribution local to imperfections,a three-dimensional numerical model was *** defects facilitate the local delamination process,and the overlap defect postpones the damage onset and the propagation.

关键词： Automated Fiber Placement(AFP) Defects Delamination Fracture toughness Laminates

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Water Reducer: A Highly Dispersing Binder for High-Performance Lithium-Sulfur Batteries

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Chinese Journal of Chemistry 2021年第6期39卷 1523-1530页

作者： xin Geng Ruihao Lin xingxing Gu Zhi Su Chao Lai College of Chemistry and Chemical Engineering Xinjiang Normal UniversityUrumqiXinjiang 830054China School of Chemistry and Materials Science Jiangsu Normal UniversityXuzhouJiangsu 221116China Chongqing Key Laboratory of Catalysis and New Environmental Materials College of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400065China

Sulfur has been paid close attention by the research and manufacturing as a cathode material for lithium-sulfur batteries(LSB)in recent decade because it has high specific capacity and low *** the low utilization of active materials and serious shuttle phenomenon inhibit its commercialization *** this work,for the first time,water reducers are reported as multifunctional binders to address the above problems to enhance the performance of *** to the synthetic actions of the water reducer binder,such as highly dispersing effect and good chemical trapping function,commercial sulfur powders are directly used as cathodes,and much better electrochemical performance compared to using the conventional binder polyvinylidene fluoride(PVDF)was obtained,among which the sulfur cathode with sulfonated melamine formaldehyde(SMF)water reducer binder exhibits a high reversible capacity of 625.5 mA·h·g^(-1) after 200 cycles at 1 C and the cathode with polycarboxylic acid(PC)water reducer binder even demonstrates a high area specific capacity of 5 mA·h·cm^(-2) at high sulfur loading of 5 mg·cm^(-2).These low-cost water reducers are a promising binder for LSB in the future.

关键词： Energy conversion Polymers Binder Polyanions Adsorption

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Intraseasonal variability of the Kuroshio observed via mooring at 18°N

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Journal of Oceanology and Limnology 2024年第2期42卷 468-483页

作者： xin YUAN Qingye WANG Jie MA Shijian HU Dunxin HU Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laoshan Laboratory Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Insufficient observations near the origin of the Kuroshio have led to incomplete understanding of the intraseasonal variability(ISV)of the *** measurements of the Kuroshio velocity were performed with an array of three profiler moorings(122.7°E,123°E,and 123.3°E)along 18°N from January 2018 to February *** ISV of the Kuroshio at 18°N was investigated based on a combination of mooring observations and global high-resolution HYbrid Coordinate Ocean Model reanalysis *** estimated time-averaged transport in the upper 350 m across the observation transect was 6.5±2.6 Sv(1.0 Sv=10^(6)m^(3)/s).Two significant ISV peaks at 50-60 and~100 d were recognized in the power spectra of the meridional velocity and *** analysis indicated that the ISV at 50-60 d was caused by westward-propagating eddies at average propagation speed of~13 cm/s and wavelength of~635 *** ISV peak at~100 d was mainly caused by northward-propagating eddies generated in the North Equatorial Current *** investigation indicated that the ISV of the Kuroshio at 18°N is dominated by meridional transport,rather than by the zonal migration of the Kuroshio main *** findings provide a better understanding of the ISV of the Kuroshio east of Luzon Island.

关键词： intraseasonal variability(ISV) Kuroshio mooring observation eddy

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Large-scale fabrication of decoupling coatings with promising robustness and superhydrophobicity for antifouling,drag reduction,and organic photodegradation

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Friction 2023年第5期11卷 716-736页

作者： Lei xin Hao LI Jian GAO Zhongwei WANG KaiJie ZHOU Sirong YU School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580China

It is still a challenge to achieve large-area preparation of robust superhydrophobic surfaces with strong mechanical ***,a simple and low-cost method to prepare robust decoupling superhydrophobic coatings on aluminum(Al)alloys substrate has been *** superhydrophobicity and robustness of decoupling coatings are realized by structuring surfaces at two different length scales,with nanostructures for superhydrophobicity and microstructures for *** prepared decoupling coating shows promising superhydrophobicity,with water contact angle(CA)of~158.4°and roll off angle(RA)of~3°.It also exhibits high repellency for impacting water ***,the decoupling coating processes outstanding adhesion strength on the substrate after tape-peeling and cross-cut tests,also with promising wear resistantance after sandpaper abrasion and wear *** friction coefficient of this decoupling coating is only~*** addition,the robust decoupling superhydrophobic coating is applied to underwater buoyancy enhancement and fluid resistance reduction(drag reduction rate~30.09%).This decoupling superhydrophobic coating also displays promising self-cleaning and antifouling ***,benefitting from the photocatalytic property of TiO2,this decoupling coating is also exploited for degrading organics to achieve seawater *** obtained decoupling superhydrophobic coating is expected to apply on other solids in marine fields,and the simple and eco-friendly method develops the potential practical application.

关键词： Superhydrophobic decoupling wear resistance drag reduction

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Phenomenological study of the anisotropic quark matter in the two-flavor Nambu–Jona–Lasinio model

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Nuclear Science and Techniques 2022年第11期33卷 170-190页

作者： He-Xia Zhang Yu-xin Xiao Jin-Wen Kang Ben-Wei Zhang Key Laboratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan 430079China Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China

With the two-flavor Nambu–Jona–Lasinio (NJL) model, we carried out a phenomenological study on the chiral phase structure, mesonic properties, and transport properties of momentum-space anisotropic quark matter. To calculate the transport coefficients we utilized the kinetic theory in the relaxation time approximation, where the momentum anisotropy is embedded in the estimation of both the distribution function and relaxation time. It was shown that an increase in the anisotropy parameterξmay result in a catalysis of chiral symmetry breaking. The critical endpoint(CEP) is shifted to lower temperatures and larger quark chemical potentials asξincreases, and the impact of momentum anisotropy on the CEP temperature is almost the same as that on the quark chemical potential of the CEP. The meson masses and the associated decay widths also exhibit a significant ξ dependence. It was observed that the temperature behavior of the scaled shear viscosity η/T~3 and scaled electrical conductivity σ/T exhibited a similar dip structure, with the minima of both η/T~3 and σ/T shifting toward higher temperatures with increasing ξ. Furthermore,we demonstrated that the Seebeck coefficient S decreases when the temperature rises and its sign is positive, indicating that the dominant carriers for converting the temperature gradient to the electric field are up-quarks. The Seebeck coefficient S is significantly enhanced with a largeξfor a temperature below the critical temperature.

关键词： Heavy-ion collision Momentum anisotropy NJL model Chiral phase transition Transport coefficient Quark matter

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社区老年人照护需求现状及影响因素研究:基于三省的基线调查

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中国全科医学 2025年第1期28卷 59-64页

作者：安然唐昕齐士格王志会崔露张晗郭浩岩中国疾病预防控制中心慢性非传染性疾病预防控制中心老年健康室北京市100050 首都医科大学公共卫生学院北京市100069 中国疾病预防控制中心营养与健康所北京市100050

背景人口老龄化背景下对老年人照护的研究逐渐成为热点。以往对老年人照护需求率的调查存在较大差异(8.54%~53.15%),缺乏大样本的研究证据。目的了解我国社区老年人照护需求现状及其影响因素。方法调查对象来自国家重大公共卫生专项“... 详细信息

背景人口老龄化背景下对老年人照护的研究逐渐成为热点。以往对老年人照护需求率的调查存在较大差异(8.54%~53.15%),缺乏大样本的研究证据。目的了解我国社区老年人照护需求现状及其影响因素。方法调查对象来自国家重大公共卫生专项“老年期重点疾病预防和干预”项目2019年的基线调查,该调查采用多阶段分层整群随机抽样方法,在辽宁省、河南省和广东省的16个区(县)共抽取16199名60岁及以上老年人开展问卷调查,问卷内容主要包括基本人口学特征(性别、年龄、城乡、婚姻状况、文化程度、职业、体质量、居住情况)、照护需求现状、患慢性病情况、病人健康问卷抑郁自评量表(PHQ-9)、简易智能精神状态检查(MMSE)量表、老年人日常生活活动能力调查(ADL)量表、自评健康状况、每天锻炼身体和跌倒情况(过去1年)等。采用PHQ-9评定老年人的心理状况、MMSE量表评估老年人的认知功能,老年人照护需求评估采用ADL量表(存在BADL或IADL失能)或自报需要照护。采用Logistic回归分析探讨老年人照护需求的影响因素。结果收集有效样本数据16193份,社区老年人照护需求率为14.57%(95%CI=14.02%~15.11%),随着年龄增加照护需求率逐步上升,女性的照护需求率高于男性(P<0.05)。多因素Logistic分析结果显示,年龄每增加一岁照护需求风险增加7%(OR=1.07,95%CI=1.06~1.08);与文盲相比,文化程度在小学、初中、高中及以上老年人照护需求OR(95%CI)分别为0.33(0.29~0.37)、0.24(0.20~0.28)、0.17(0.12~0.22);与每日锻炼身体相比,每日不锻炼老年人照护需求OR(95%CI)为1.17(1.05~1.30);与不患慢性病人群相比,患1~2种和患3种及以上慢性病老年人照护需求OR(95%CI)分别为1.29(1.10~1.51)、1.57(1.35~1.82);与认知功能正常相比,认知功能异常老年人照护需求OR(95%CI)为2.02(1.79~2.27);与自评健康状态好相比,自评健康状况一般和自评健康状况差老年人照护需求OR(95%CI)分别为1.29(1.14~1.46)、2.68(2.27~3.16);与没有摔倒过相比,摔倒1~2次和3次及以上老年人照护需求OR(95%CI)分别为1.23(1.06~1.43)、2.00(1.59~2.52);与心理状况良好相比,轻度和中重度抑郁老年人照护需求OR(95%CI)分别为1.14(1.21~1.65)、2.05(1.69~2.48)。结论我国三省社区老年人照护需求率较高,且高龄、身体及心理健康状况差、跌倒次数多的老年人照护需求率更高。

关键词：病人医疗护理老年照护居住特征照护需求老年人影响因素分析

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Mission segment division of the whole aeroengine loading spectrum based on flight actions

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Chinese Journal of Aeronautics 2022年第2期35卷 164-174页

作者： Yu JIN Zhigang SUN Yingdong SONG xin LIN Xuming NIU Junjie DING Jiangsu Province Key Laboratory of Aerospace Power System College of Energy and Power EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Aero-engine Thermal Environment and StructureMinistry of Industry and Information TechnologyNanjing 210016China State Key Laboratory of Mechanics and Control Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

This paper studies on a division method of the whole aeroengine loading spectrum flight mission segment and rotor speed mission segment,which is based on the actual flight actions and related to the flight operations of aeroengine and is suitable for the variable-speed aeroengines such as turbojet and *** the research,the aeroengine loading spectrum operation-related mission segments can be divided,which can provide important data basis for the life research on the structures which are sensitive to flight maneuver(such as the main shaft,large gearbox and installation section),lay a foundation for the simulation,compilation and prediction of the whole aeroengine loading ***,based on the summary of basic flight actions in actual flight,the division of flight mission segment was realized by ***,the aeroengine rotor speed mission segments,associated with flight actions and missions,were divided based on the flight mission segment division ***,the efficiency and accuracy of the mission segment division results were verified by adopting measured loading spectrum ***,the characteristics of speed mission segment division results were compared and analyzed in tables and *** comparison results show that the characteristics of similar speed mission segments are similar,while the characteristics of different speed mission segments are *** the shapes of similar mission segments vary to the change of flight actions and operations,which can reflect the operation-related feature of the segments.

关键词： Aircraft engine Flight mission segment Mission segment division Rotor speed mission segment Spectrum analysis

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