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The roles of graphene in advanced Li-ion hybrid supercapacitors

Journal of Energy Chemistry 2018年第1期27卷 43-56页

作者： Junwei Lang Xu Zhang Bao Liu RutaoWang jiangtao chen Xingbin Yan Laboratory of Clean Energy Chemistry and Materials State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PbysicsLanzhou 730000GansuChina Qingdao Center of Resource Chemistry&New Materials Qingdao 266071SbandongChina

Lithium-ion hybrid supercapacitors （LIHSs）, also called Li-ion capacitors, are electrochemical energy stor- age devices that combining the advantages of high power density of supercapacitor and high energy density of Li-ion battery. However, high power density and long cycle life are still challenges for the cul~ rent LIHSs due to the imbalance of charge-storage capacity and electrode kinetics between capacitor-type cathode and battery-type anode. Therefore, great efforts have been made on designing novel cathode materials with high storage capacity and anode material with enhanced kinetic behavior for LIHSs. With unique two-dimensional form and numerous appealing properties, for the past several years, the rational designed graphene and its composites materials exhibit greatly improved electrochemical performance as cathode or anode for LIHSs. Here, we summarized and discussed the latest advances of the state- of-art graphene-based materials for LIHSs applications. The major roles of graphene are highlighted as （1） a superior active material, （2） ultrathin 2D flexible support to remedy the sluggish reaction of the metal compound anode, and （3） good 2D building blocks for constructing macroscopic 3D pOFOUS car- bonjgraphene hybrids. In addition, some high performance aqueous LIHSs using graphene as electrode were also summarized. Finally, the perspectives and challenges are also proposed for further develop- ment of more advanced graphene-based LIHSs.

关键词： Graphene Li-ion hybrid supercapacitors Supercapacitor Lithium ion batteries Carbon materials Metal oxide Naoocomposites

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Dynamic Gaussian process regression for spatio-temporal data based on local clustering

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CHINESE JOURNAL OF AERONAUTICS 2024年第12期37卷 245-257页

作者： Wang, Binglin Yan, Liang Rong, Qi chen, jiangtao Shen, Pengfei Duan, Xiaojun Natl Univ Def Technol Coll Sci Changsha 410073 Peoples R China China Aerodynam Res & Dev Ctr Mianyang 621000 Peoples R China

This paper introduces techniques in Gaussian process regression model for spatiotemporal data collected from complex systems. This study focuses on extracting local structures and then constructing surrogate models based on Gaussian process assumptions. The proposed Dynamic Gaussian Process Regression (DGPR) consists of a sequence of local surrogate models related to each other. In DGPR, the time-based spatial clustering is carried out to divide the systems into sub-spatio-temporal parts whose interior has similar variation patterns, where the temporal information is used as the prior information for training the spatial-surrogate model. The DGPR is robust and especially suitable for the loosely coupled model structure, also allowing for parallel computation. The numerical results of the test function show the effectiveness of DGPR. Furthermore, the shock tube problem is successfully approximated under different phenomenon complexity. (c) 2024 Production and hosting by Elsevier Ltd. on behalf of Chinese Society of Aeronautics and Astronautics. This is an open access article under the CC BY-NC-ND license (http://***/ licenses/by-nc-nd/4.0/).

关键词： Gaussian processes Surrogate model Spatio-temporal systems Shock tube problem Local modeling strategy Time-based spatial clustering

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Optimized sparse polynomial chaos expansion with entropy regularization

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Advances in Aerodynamics 2022年第1期4卷 39-57页

作者： Sijie Zeng Xiaojun Duan jiangtao chen Liang Yan College of Liberal Arts and Sciences National University of Defense TechnologyChangshaChina China Aerodynamics Research and Development Center MianyangChina

Sparse Polynomial Chaos Expansion(PCE)is widely used in various engineering fields to quantitatively analyse the influence of uncertainty,while alleviating the problem of dimensionality ***,current sparse PCE techniques focus on choosing features with the largest coefficients,which may ignore uncertainties propagated with high order ***,this paper proposes the idea of selecting polynomial chaos basis based on information entropy,which aims to retain the advantages of existing sparse techniques while considering entropy change as output uncertainty.A novel entropy-based optimization method is proposed to update the state-of-the-art sparse PCE *** work further develops an entropy-based synthetic sparse model,which has higher computational *** benchmark functions and a computational fluid dynamics(CFD)experiment are used to compare the accuracy and efficiency between the proposed method and classical *** results show that entropy-based methods can better capture the features of uncertainty propagation,improving accuracy and reducing sparsity while avoiding over-fitting problems.

关键词： entropy polynomial chaos

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Rolling up MXene sheets into scrolls to promote their anode performance in lithium-ion batteries

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Journal of Energy Chemistry 2020年第7期29卷 256-263,I0008页

作者： Jianing Meng Fangfang Zhang Li Zhang Lingyang Liu jiangtao chen Bingjun Yang Xingbin Yan Laboratory of Clean Energy Chemistry and Materials State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000GansuChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Cuiying Honors College Lanzhou UniversityLanzhou 730000GansuChina Department of Physics Lanzhou University of TechnologyLanzhou 730050GansuChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116000LiaoningChina

Although Ti3 C2 MXene sheets have attracted extensive attention in lithium-ion storage techniques,their restacking makes against and even hinders the Li ions diffusion within them,thereby decreasing the capacity as well as rate performance of conventional MXene ***,for the first time,we roll up the Ti3 C2 Tx sheets into scrolls with unclosed topological structure and the interlayer galleries to alleviate the restacking ***,Ti3 C2 Tx scrolls as anode materials in lithium-ion batteries(LIBs)have higher capacity and better rate performance than Ti3 C2 Tx *** the bases of these,high-capacity silicon nanoparticles are added during the rolling process to in-situ produce Ti3 C2 Tx/Si composite *** addition of 10%silicon nanoparticles shows the best overall improvement among capacity,rate capability and cyclic stability for Ti3 C2 Tx scrolls.

关键词： Ti3C2Tx scrolls Si nanoparticles Lithium-ion batteries Anode

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Uncertainty Quantification of Store-Separation Simulation Due to Ejector Modeling using a Monte Carlo Approach with Kriging Model

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Advances in Applied Mathematics and Mechanics 2022年第3期14卷 622-651页

作者： Shuling Tian Rongjie Li Jiawei Fu Zihan Jiao jiangtao chen Key Laboratory of Unsteady Aerodynamics and Flow Control Ministry of Industry and Information TechnologyNanjing University of Aeronautics and AstronauticsNanjingJiangsu 210016China Shenyang Aircraft Design&Research Institute ShenyangLiaoning 110000China Science and Technology on Space Physics Laboratory China Academy of Launch Vehicle TechnologyBeijing 100076China China Aerodynamics Research and Development Center MianyangSichuan 621000China

Precise calculation of the trajectory of store separation is critical in assess-ing whether the store can be released *** ejection is the initial stage of the releasing process and any uncertainty introduced at this stage will propagate through the whole *** this work,the impact of the uncertainties in ejector modeling on the simulation of a generic store separation is investigated by using a Monte-Carlo-based *** reduce the extremely large computation cost resulted from the direct use CFD in Monte Carlo simulation,the CFD solutions are represented by a time-dependent Kriging model,which is constructed at each time step by using the samples from the URANS *** stochastic outputs,including the distri-bution of probability density function,expected value and 95%conﬁdence interval of store separation trajectory,are obtained by the Monte Carlo *** sensitiv-ity analysis is also carried out by using the Monte-Carlo-based method to determine the most signiﬁcant variables in ejector modeling,which affect the output *** results show that ejector modeling is one of the main uncertainty sources of store separation simulation and the approximation in ejector modeling can cause a signiﬁ-cant deviation,especially in the angular displacement.

关键词： Uncertainty quantification Monte Carlo simulation Kriging surrogate model store separation

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The sex determination gene doublesex regulates expression and secretion of the basement membrane protein Collagen Ⅳ

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Journal of Genetics and Genomics 2022年第7期49卷 636-644页

作者： Qionglin Peng jiangtao chen Rong Wang Huan Zhu Caihong Han Xiaoxiao Ji Yufeng Pan The Key Laboratory of Developmental Genes and Human Disease School of Life Science and TechnologySoutheast UniversityNanjingJiangsu 210096China Co-innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu 226019China

The highly conserved doublesex(dsx) and doublesex/mab-3 related(Dmrt) genes control sexually dimorphic traits across animals. The dsx gene encodes sex-specific transcription factors, Dsx^(M) in males and Dsx^(F) in females, which function differentially and often oppositely to establish sexual dimorphism. Here, we report that mutations in dsx, or overexpression of dsx, result in abnormal distribution of the basement membrane(BM) protein Collagen Ⅳ in the fat body. We find that Dsx isoforms regulate the expression of Collagen Ⅳ in the fat body and its secretion into the BM of other tissues. We identify the procollagen lysyl hydroxylase(dPlod) gene, which is involved in the biosynthesis of Collagen Ⅳ, as a direct target of Dsx. We further show that Dsx regulates Collagen Ⅳ through d Plod-dependent and independent pathways. These findings reveal how Dsx isoforms function in the secretory fat body to regulate Collagen Ⅳ and remotely establish sexual dimorphism.

关键词： Drosophila Sexual dimorphism doublesex Dmrt genes CollagenⅣ dPlod Fat body

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The sex determination gene doublesex is required during adulthood to maintain sexual orientation

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Journal of Genetics and Genomics 2022年第2期49卷 165-168页

作者： Qionglin Peng jiangtao chen Xiangbin Su Rong Wang Caihong Han Yufeng Pan The Key Laboratory of Developmental Genes and Human Disease School of Life Science and TechnologySoutheast UniversityNanjing 210096China Co-innovation Center of Neuroregeneration Nantong UniversityNantong 226019China

Gender differences in behavior are prevalent among animal kingdoms. The causal links among a particular gene, neural circuitry, and gendered behaviors have long been of particular interest in neuroscience. The fruit fly, Drosophila melanogaster, is a wonderful animal model with fruitful genetic tools to tackle these questions(Guo et al., 2019). It has been found that two sex determination genes,fruitless(fru) and doublesex(dsx), jointly govern the sex differences in the nervous system that regulate the male-specific courtship behavior(Burtis and Baker, 1989;Ito et al., 1996;Ryner et al.

关键词： determination behavior jointly

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Large field emission current and density from robust carbon nanotube cathodes for continuous and pulsed electron sources

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Science China Materials 2017年第4期60卷 335-342页

作者： jiangtao chen Laboratory of Clean Energy Chemistry and Materials State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

Highly adhesive cold cathodes with high field emission performance are fabricated by using a screen-print- ing method. The emission density of carbon nanotube （CNT） cold cathode reaches 207.0 mA cm-2 at an electric field of 4.5 Vμm-1 under continuous driving mode, and high peak current emission of 315.8 mA corresponding to 4.5 A cm 2 at the electric field of 10.3 V μm-1 under pulsed driving mode. The emission patterns of the cold cathodes are of excellent uniformity that was revealed by vivid luminescent patterns of phosphor coated transparent indium tin oxide （ITO） an- ode. The cold cathodes also exhibit highly stable emission under continuous and pulsed driving modes. The high adhe- sion of CNTs to molybdenum substrates results in robust cold cathodes and is responsible for the high field emission performance. This robust CNT emitter could meet the operating requirements of continuous and pulsed electron sources, and it provides promising applications in various vacuum- micro/nanoelectronic devices.

关键词： field emission carbon nanotube cold electronsource

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Influence of Moderate Temperature Treatment on Thermal Cycling Behaviour and Mechanical Properties of the CuAINiMnTi Alloys

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Journal of Materials Science & Technology 1993年第6期9卷 445-448页

作者： jiangtao LI Feixia chen Fengting WANG Dazhi YANG Dalian University of Technology,Dalian,116024,China

The influence of moderate temperature treatment after quenching on thermal cycling behaviour and mechanical properties of the CuAlNiMnTi shape memory alloys have been *** is shown that there will be α phase precipitation in the alloy when it is subjected to quenching followed by moderate temperature treatment at 600℃.The precipitation of α phase can suppress NiAl-base phase precipitation during subsequent thermal cycling,therefore the stabilization of transformation temperature during thermal cycling can be *** suitable amount of α phase precipitation contributes to the improvement of mechanical properties of the alloy by changing the fracture morphology.

关键词： CuAlNiMnTi shape memory alloy thermal cycling mechanical property

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Transforming growth factor-beta 1 enhances discharge activity of cortical neurons

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Neural Regeneration Research 2025年第2期20卷 548-556页

作者： Zhihui Ren Tian Li Xueer Liu Zelin Zhang Xiaoxuan chen Weiqiang chen Kangsheng Li jiangtao Sheng Department of Microbiology and Immunology Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular ImmunopathologyShantou University Medical CollegeShantouGuangdong ProvinceChina Department of Neurosurgery First Affiliated Hospital of Shantou University Medical CollegeShantouGuangdong ProvinceChina

Transforming growth factor-beta 1(TGF-β1)has been extensively studied for its pleiotropic effects on central nervous system *** neuroprotective or neurotoxic effects of TGF-β1 in specific brain areas may depend on the pathological process and cell types ***-gated sodium channels(VGSCs)are essential ion channels for the generation of action potentials in neurons,and are involved in various neuroexcitation-related ***,the effects of TGF-β1 on the functional properties of VGSCs and firing properties in cortical neurons remain *** this study,we investigated the effects of TGF-β1 on VGSC function and firing properties in primary cortical neurons from *** found that TGF-β1 increased VGSC current density in a dose-and time-dependent manner,which was attributable to the upregulation of Nav1.3 *** VGSC current density and Nav1.3 expression were significantly abolished by preincubation with inhibitors of mitogen-activated protein kinase kinase(PD98059),p38 mitogen-activated protein kinase(SB203580),and Jun NH2-terminal kinase 1/2 inhibitor(SP600125).Interestingly,TGF-β1 significantly increased the firing threshold of action potentials but did not change their firing rate in cortical *** findings suggest that TGF-β1 can increase Nav1.3 expression through activation of the ERK1/2-JNK-MAPK pathway,which leads to a decrease in the firing threshold of action potentials in cortical neurons under pathological ***,this contributes to the occurrence and progression of neuroexcitatory-related diseases of the central nervous system.

关键词： central nervous system cortical neurons ERK firing properties JNK Nav1.3 p38 transforming growth factor-beta 1 traumatic brain injury voltage-gated sodium currents

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