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Outstanding performances of graphite||NMC622 pouch cells enabled by a non-inert diluent

Journal of Energy Chemistry 2023年第6期81卷 593-602,I0013页

作者： Qinqin cai hao Jia Guanjie li Zhangyating Xie Xintao Zhou Zekai Ma lidan Xing Weishan li Engineering Research Center of MTEES(Ministry of Education) Research Center of BMET(Guangdong Province)Engineering Lab.of OFMHEB(Guangdong Province)Key Lab.of ETESPG(GHEI)and Innovative Platform for ITBMD(Guangzhou Municipality)School of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina

Although high salt concentration electrolyte(HCE)can construct effective li F-rich interphase film and solve the interphasial instability issue of graphite anode,its high cost,high viscosity and poor wettability with electrode materials limit its large-scale ***,localized high concentration electrolyte(LHCE)is obtained by introducing an electrochemically inert diluent into HCE to avoid the above-mentioned problems while maintaining the high interphasial stability of HCE with graphite *** traditional inert diluents,1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluropropyl ether(TTE)with electrochemical activity is introduced into propylene carbonate(PC)-based HCE to obtain LHCE-2(1 M liPF_(6),PC:DMC:TTE=1:1:6.1)*** and theoretical simulation results show that TTE participates in the oxidation decomposition and film-forming reaction at the NCM622 cathode surface,conducting a cathode electrolyte interphase(CEI)rich in organic fluorides with excellent electron insulation ability,high structural stability and low interphasial *** to the outstanding interphasial properties induced by LHCE-2,the graphite||NMC622 pouch cell reaches a capacity retention of 80%after 500 cycles at 1 C under room *** at sub-zero temperatures,the capacity released by the cell with LHCE-2 electrolyte is significantly higher than that of HCE and conventional EC-based ***,the LHCE-2 electrolyte inherits the advantages of TTE flame-resistant,thus improving the safety of the battery.

关键词： lithium-ion batteries Propylene carbonate Localized high-concentration electrolyte Non-Inert diluent Graphite||NMC622 pouch cells

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Infrared studies of vacancy-oxygen-related complexes in electron-irradiated Czochralski-silicon

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Rare Metals 2006年第z2期25卷 55-58页

作者： cai lili CHEN Hongjian li Yangxian CHEN Guifeng li Xinghua hao Jiangang ZHANG Yu School of Material Science and Engineering Hebei University of TechnologyTianjin 300130China Tianjin Institute of Technical Physics Tianjin 300130China

The oxygen-related defects in CZ silicon during electron irradiation(1.5 MeV)and subsequent annealing in the range of 150-600℃were investigated by means of *** the electron irradiation CZ-Si,vacancy-oxygen complex is one of the dominant defects and its concentration is proportional to electron dose but not related to oxygen *** this work,it was focused on the identification of the weak band at 860 cm^(-1)which was originated from asymmetrical stretching vibrations of an oxygen atom in the negative VO *** exhibits the same thermal stability with neutral VO band at 830 cm^(-1).In addition,the intensity of 889 cm-1 band has never been observed to exceed that of the A-center,implying that only a partial transformation of VO into VO_(2)does occur.

关键词： electron-irradiation VO FTIR irradiation defect

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Estimation of pollutant sources in multi-zone buildings through different deconvolution algorithms

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Building Simulation 2022年第5期15卷 817-830页

作者： Mo li Fei li Yuanqi Jing Kai Zhang hao cai Lufang Chen Xian Zhang lihang Feng College of Urban Construction Nanjing Tech UniversityNanjing210009China Institute of Defense Engineering Academy of Military SciencePLABeijing100850China College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing210009Chino

Effective identification of pollution sources is particularly important for indoor air *** estimation of source strength is the basis for source effective *** paper proposes an optimization method for the deconvolution process in the source strength inverse *** the scheme,the concept of time resolution was defined,and combined with different filtering positions and filtering *** measures to reduce effects of measurement noise were quantitatively ***,the performances of nine deconvolution inverse algorithms under experimental and simulated conditions were evaluated and *** hybrid algorithms were proposed and compared with single algorithms including Tikhonov regularization and iterative *** showed that for the filtering position and algorithm,Butterworth filtering performed better,and different filtering positions had little effect on the inverse *** the calculation time step,the optimal Tr(time resolution)was 0.667%and 1.33%in the simulation and experiment,*** hybrid algorithms were found to not perform better than the single algorithms,and the SART(simultaneous algebraic reconstruction technique)algorithm from CAT(computer assisted tomography)yielded better performances in the accuracy and stability of source strength *** relative errors of the inverse calculation for source strength were typically below 25%using the optimization scheme.

关键词： pollutant source measurement noise inverse algorithm indoor air algorithm ranking

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Hierarchical Ti_(3)C_(2)T_(x)@MoS_(2) heterostructures:A first principles calculation and application in corrosion/wear protection

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Journal of Materials Science & Technology 2022年第21期116卷 151-160页

作者： Meng cai Peng Feng Han Yan Yuting li Shijie Song Wen li hao li Xiaoqiang Fan Minhao Zhu Tribology Research Institute School of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China

Surface and interface engineering plays a crucial role in modulating the properties of materials,especially two-dimensional(2D)***,a strategy,forming heterostructures with MoS_(2),is proposed to overcome the natural agglomeration of Ti_(3)C_(2)T_(x) MXene *** importantly,the interactions between Ti_(3)C_(2)Tx and MoS_(2) were elaborately investigated by first-principles calculations based on density functional theory(DFT)for the first *** calculations demonstrate that van der Waals forces dominate the interface interactions of Ti_(3)C_(2)T_(x) and MoS_(2),rendering Ti_(3)C_(2)T_(x)@MoS_(2) heterostructures favorable *** Ti_(3)C_(2)T_(x)@MoS_(2) heterostructure composites were synthesized through a facile one-step hydrothermal method and exhibit a 2D hierarchical ***,the corrosion and tribological properties of epoxy composite coatings with varying proportions of Ti_(3)C_(2)T_(x)@MoS_(2) composites were studied in *** a result,the epoxy composite coating with 0.1 wt.%Ti_(3)C_(2)T_(x)@MoS_(2) composites(Ti_(3)C_(2)T_(x)@MoS_(2)-0.1)exhibits excellent corrosion protection and antiwear *** Ti_(3)C_(2)T_(x)@MoS_(2)-0.1 keeps the largest low-frequency impedance modulus(|Z|_(0.)01 Hz)and coating resistance(R_(c))during the whole immersion *** wear rate is 0.09μm^(3)/(Nμm)under the load of 10 N,one half of that of pure epoxy coating(EP).This work further broadens the application of MXene-based heterostructure composites.

关键词： First-principles calculations Ti_(3)C_(2)T_(x)MXene MoS_(2) Heterostructure Corrosion/wear

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Efect of Ball Scribing on Relative Permeability of Grain-oriented Electrical Steel

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Acta Metallurgica Sinica(English Letters) 2013年第5期26卷 618-622页

作者： hao WANG Changsheng li Tao ZHU Nkwachukwu Chukwuchekwa Ban cai Gang HUO State Key Laboratory of Rolling and Automation Northeastern University Wolfson Centre for Magnetics Cardif University Pohang Cold Strip Rolling Co.Ltd of Bensteel

Efect of ball scribing on relative permeability of conventional grain-oriented（CGO） and high permeability grain-oriented（HGO） electrical steel was investigated. The samples were scribed with spacing of 2 mm, 4 mm, 8 mm and 16 mm. The results show that after ball scribing with 16 mm width at 1.0 T, relative permeability of both℃GO and HGO steels was increased by 109% and 80%, respectively. Relative permeability rises as the scribing space increases, with the movement of the peak value of relative permeability to a higher flux density. Relational models describing relative permeability and flux density were constructed with high accuracy based on experimental data. The experimental data curves were analyzed during the magnetizing process.

关键词： Ball scribing Grain-oriented electrical steel Relative permeability Relational modeling

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Effect of Ball Scribing on Magnetic Barkhausen Noise of Grain-oriented Electrical Steel

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Journal of Materials Science & Technology 2013年第7期29卷 673-677页

作者： hao Wang Changsheng li Tao Zhu Ban cai Gang Huo Nasir Mohamed State Key Laboratory of Rolling and Automation Northeastern University Wolfson Centre for Magnetics Cardiff UniversityCardiff CF24 3AAUK Benxi Steel Posco Cold Strip Rolling Co.Ltd

Effect of ball scribing on magnetic Barkhausen noise （MBN） of conventional grain-oriented （CGO） and high- permeability grain-oriented （HGO） electrical steel was investigated. The results showed that after ball scribing, root mean square of MBN （MBNrms） of CGO electrical steel increased 9.8% with 4 mm scribing spacing at 1.2 T, and that of HGO electrical steel apparently decreased 17.3% with 16 mm scribing spacing at 1.2 T. Through the formation and development of free magnetic poles and secondary magnetic domains due to compressive stress, primary magnetic domain space of grain-oriented electrical steel becomes smaller, which reflects as a variation of MBN in the macroscopic magnetic properties. Through correlation formula derivation of MBNrms and equilibrium distance between domain walls, effect of domain refinement on grain-oriented electrical steel was also interpreted, and optimum equilibrium distance between domain walls was determined.

关键词： Ball scribing Grain-oriented electrical steel Magnetic Barkhausen noise Domain refinement

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基于太赫兹-热重光谱的粘土矿物热解特性表征

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光谱学与光谱分析 2025年第1期45卷 179-182页

作者：栗欣妤刘彩琴黄昊翀郑志远张自力邱昆峰中国地质大学(北京)数理学院北京100083 中国地质大学(北京)地球科学与资源学院北京100083

粘土矿物是粘土岩和土壤的重要组成部分,是地球表面大部分覆盖物的主要物质单元,深入研究其结构特点、粒径大小及含水量的变化等特征对探究粘土矿物富集地区的环境演变规律和矿物工业应用具有重要指导意义。面对地学领域多样化的实际应... 详细信息

粘土矿物是粘土岩和土壤的重要组成部分,是地球表面大部分覆盖物的主要物质单元,深入研究其结构特点、粒径大小及含水量的变化等特征对探究粘土矿物富集地区的环境演变规律和矿物工业应用具有重要指导意义。面对地学领域多样化的实际应用需求,常见的矿物表征方法在挖掘矿物中指针性极强的物理特性时经常受限。作为一种新型非接触式相干测试手段,太赫兹光谱技术利用该波段指纹谱、宽光谱及水敏感等众多优势特性,可对粘土矿物进行无损探测并获得振幅和相位等光学信息,从而区分其晶体结构及成分组成。本文以太赫兹时域光谱技术为主要手段,同时结合热重分析和傅里叶红外光谱技术对粘土矿物的热解特性展开一系列研究。其中,高岭土作为重要原料,其成分组成、粒径大小及煅烧产物都会影响陶瓷质量。实验结果证实不同状态的高岭土在太赫兹波段下的吸收系数和折射率等光学参数会发生明显变化。结构单元为2∶1型层状硅酸盐的滑石和叶腊石因其晶体结构中八面体阳离子的不同,使得光谱差异明显,这很好地反映出典型呈电中性含水矿物的热解产物及含水量指标。值得一提的是,与太赫兹领域的传统认知不同,除却一些化学手段干预,实验过程中发现叶腊石在1.10 THz具备特征吸收峰,该峰的出现既能帮助物质定性表征和光学器件发展,又丰富了太赫兹光谱对矿物的全面了解,为太赫兹光谱学与地学的交叉研究提供新的研究角度。

关键词：太赫兹光谱粘土矿物吸收系数热解特性

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Hybrid uncertainty-based design optimization and its application to hybrid rocket motors for manned lunar landing

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Chinese Journal of Aeronautics 2017年第2期30卷 719-725页

作者： Zhu hao Tian Hui cai Guobiao School of Aeronautics Science and Engineering Beihang University Beijing 100083 China

Design reliability and robustness are getting increasingly important for the general design of aerospace systems with many inherently uncertain design *** paper presents a hybrid uncertainty-based design optimization（UDO） method developed from probability theory and interval *** of the uncertain design parameters which have sufficient information or experimental data are classified as random variables using probability theory,while the others are defined as interval variables with interval *** a hybrid uncertainty analysis method based on Monte Carlo simulation and Taylor series interval analysis is developed to obtain the uncertainty propagation from the design parameters to system *** design optimization strategies,including deterministic design optimization（DDO）,probabilistic UDO and hybrid UDO,are applied to the conceptual design of a hybrid rocket motor（HRM） used as the ascent propulsion system in Apollo lunar *** comparison,the hybrid UDO is a feasible method and can be effectively applied to the general design of aerospace systems.

关键词： Hybrid rocket motor Hybrid uncertainty-based design optimization Manned lunar landing Uncertainty analysis

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Regularity and prediction of ground pressure in Haigou Gold Mine

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Journal of University of Science and Technology Beijing 2008年第5期15卷 521-527页

作者： Meifeng cai Shuhua hao Hongguang Ji Civil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China

Previous mining excavation in upper sublevels left several mined-out areas in Haigou gold mine. To ensure safety of the main and auxiliary shafts and mining production in deeper sublevels, systematical studies on regularity, prediction, and control of ground pressure in the mine were carried out. Through 3D-numerical modeling and in-situ monitoring of acoustic emission, pressure and displacement, the ground pressure activity and the stability status of surrounding rock masses and the two shafts were assessed. Based on in-situ monitoring practice in Haigou mine,4 modes to judge rock stability according to the monitoring information of acoustic emission,pressure,and displacement were presented.

关键词： ground pressure regularity prediction numerical modeling in-situ monitoring 4 judgment modes

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Development and characterization of wheat–Aegilops kotschyi 1U^(k)(1A)substitution line with positive dough quality parameters

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Journal of Integrative Agriculture 2023年第4期22卷 999-1008页

作者： JIANG Yun WANG De-li hao Ming ZHANG Jie liU Deng-cai State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural UniversityChengdu 611130P.R.China Biotechnology and Nuclear Technology Research Institute Sichuan Academy of Agricultural SciencesChengdu 610061P.R.China Triticeae Research Institute Sichuan Agricultural UniversityChengdu 611130P.R.China

Exploring novel high molecular weight glutenin subunits(HMW-GSs)from wild related species is a strategy to improve wheat processing *** objective of the present investigation was to identify the chromosomes of the wheatalien introgression line N124,derived from the hybridization between Triticum aestivum with Aegilops kotschyi,and characterize the effects on quality-related *** in situ hybridization karyotypes showed that N124 is a disomic 1U^(k)(1A)substitution *** dodecyl sulfate polyacrylamide gel electrophoresis(SDS-PAGE)and reversedphase high-performance liquid chromatography verified N124 expressed two HMW-GSs of the *** *** RNA sequencing and phylogenetic analysis confirmed that the two HMW-GSs were U^(k)x and U^(k)*** to the wheat parent,the substitution line had no obvious agronomic defects except fewer grains per spike but improved several major quality *** can be served as a donor or bridge material for wheat quality improvement.

关键词： Aegilops kotschyi common wheat 1Uk(1A)substitution line HMW-GS processing quality

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