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24篇 您的检索式:作者名="Xiaobin Niu"
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1Criteria for the growth of large-area adlayer-free monolayer graphene films by chemical vapor deposition显示文摘Homogeneity is important to material applications for good performance of individual devices,for making AB-stacked bilayer graphene in a layer-by-layer stacking order,and from the point of view of industrial production.Among many properties to be controlled,for the case of graphene,the thickness(or layer number)uniformity is the prerequisite.Chemical vapor deposition(CVD)of C precursors on Cu substrates is the most popular method to produce large-area graphene films.To date,precise control on the number of graphene layers as well as the uniformity over a large area is still very challenging.In this work,with a further understanding of the factors affecting adlayer growth,the synthesis of large-area adlayer-free monolayer graphene(MLG)films was achieved up to tens of squared centimeters in area by just using untreated Cu foil and a normal CVD process.We found that keeping equal C precursor concentration on the two sides of the Cu substrate is a criterion in addition to other factors such as the ratio of H:C and the substrate surface morphology for the growth of adlayer-free MLG.This finding is not only of great significance for the industrial production of large-area adlayer-free MLG films but also instructive for the synthesis of homogeneous few-layer graphene.Changqing Shen Xingzhou Yan Fangzhu Qing Xiaobin Niu Richard Stehle Samuel S.Mao Wanli Zhang Xuesong Li 2019Journal of Materiomics2019,5,3:2
2High-efficient crystal particle manufacture by microscale process intensification technology显示文摘High-end crystal manufacture has drawn a permanent concern on the high-efficient manufacture of crystal particles,especially in fine chemical,pharmaceutical,electronics,biological and relative engineering fields.In recent years,a series of microscale process intensification(MPI)technologies have been widely used in crystal particles preparation via addressing the control of nucleation and growth process.Herein,we review the research progresses of microscale process intensification technology from three aspects,microfluidics devices,microscale force field technology and membrane-based microchannels and interface transfer process.Firstly,the principle of microfluidic and relative microscale device on improving micro-mixing and mass transfer are briefly described.The advantage of microfluidic in continuous nano particle preparation is outlined.Microscale external force field(ultrasonic,high-gravity,electric and magnetic fields)is then introduced as another novel approach for ultrafine nanoparticles and continuous drug crystallization process.Further,in view of the micro-scale intensified mass transfer and microscale interfacial force field established on membrane technology,the basic mechanism of membrane crystallization(microscale 2D supersaturation degree control,auto seed detachment,microporous membrane dispersion,etc.)is reviewed.The process coupling and design strategy aiming for enhancing the manufacture capacity is also illustrated.Finally,the developing tendency and key challenges of high-efficient crystal particle preparation technology via microscale processes are overviewed.Yuchao Niu Shaofu Du Lei Sheng Wu Xiao Xiaobin Jiang Gaohong He 2021Green Chemical Engineering2021,2,1:2
3Bottom-up lithium growth guided by Ag concentration gradient in 3D PVDF framework towards stable lithium metal anode显示文摘Three-dimensional(3 D)frameworks have received much attention as an effective modification strategy for next-generation high-energy-density lithium metal batteries.However,the top-growth mode of lithium(Li)on the 3 D framework remains a tough challenge.To achieve a uniform bottom-up Li growth,a scheme involving Ag concentration gradient in 3 D PVDF framework(C-Ag/PVDF)is proposed.Ag nanoparticles with a concentration gradient induce an interface activity gradient in the 3 D framework,and this gradient feature is still maintained during the cycle.As a result,the C-Ag/PVDF framework delivers a long lifespan over 1800 h at a current density of 1 mA cm^(-2) with a capacity of 1 mAh cm^(-2),and shows an ultra-long life(>1300 h)even at a high current density of 4 mA cm^(-2) with a capacity of 4 mAh cm^(-2).The advantage of concentration gradient provides further insights into the optimal design of the 3 D framework for stable Li metal anode.Yulin Zhao Liping Wang Jian Zou Qiwen Ran Li Li Pengyu Chen Hailong Yu Jian Gao Xiaobin Niu 2022Journal of Energy Chemistry2022,31,2:2
4Atomic-scale structural and chemical evolution of Li3V2(PO4)3 cathode cycled at high voltage window显示文摘Here,by using atomically resolved scanning transmission electron microscopy and electron energy loss spectroscopy,we investigate the structural and chemical evolution of Li3V2(PO4)3 (LVP) upon the high-voltage window (3.0-4.8 V).We find that the valence of vanadium gradually increases towards the core corresponding to the formation of electrochemically inactive Li3-xV2(PO4)3 (L3-xVP) phases.These Li-deficient phases exhibit structure distortion with superstructure stripes,likely caused by the migration of the vanadium,which can slow down the lithium ion diffusion or even block the diffusion channels.Such kinetic limitations lead to the formation of Li-deficient phase along with capacity loss.Thus,the LVP continuously losses of electrochemical activity and Li-deficient phases gradually grow from the particle core towards the surface during cycling.After 500 cycles,the thickness of active LVP layer decreases to be - 5-20 nm.Moreover,the micromorphology and chemical composition of solid electrolyte interphase (SEI) have been investigated,indicating the thick SEI film also contributes to the capacity loss.The present work reveals the structural and chemical evolution in the cycled electrode materials at an atomic scale,which is essential to understand the voltage fading and capacity decaying of LVP cathode.Shulin Chen Jian Zou Yuehui Li Ning Li Mei Wu Jinghuang Lin Jingmin Zhang Jian Cao Jicai Feng Xiaobin Niu Jianming Bai Junlei Qi Peng Gao Liping Wang Hong Li 2019Nano Research2019,12,7:1
5Interfacial induction and regulation for microscale crystallization process:a critical review显示文摘Microscale crystallization is at the frontier of chemical engineering,material science,and biochemical research and is affected by many factors.The precise regulation and control of microscale crystal processes is still a major challenge.In the heterogeneous induced nucleation process,the chemical and micro/nanostructural characteristics of the interface play a dominant role.Ideal crystal products can be obtained by modifying the interface characteristics,which has been proven to be a promising strategy.This review illustrates the application of interface properties,including chemical characteristics(hydropho-bicity and functional groups)and the morphology of micro/nanostructures(rough structure and cavities,pore shape and pore size,surface porosity,channels),in various microscale crystallization controls and process intensification.Finally,possible future research and development directions are outlined to emphasize the importance of interfacial crystallization control and regulation for crystal engineering.Mengyuan Wu Zhijie Yuan Yuchao Niu Yingshuang Meng Gaohong He Xiaobin Jiang 2022Frontiers of Chemical Science and Engineering2022,16,6:1
6Epitaxial growth and thermal-conductivity limit of singlecrystalline Bi2Se3/In2Se3 superlattices on mica显示文摘在超点阵的热运输被各种各样的散布声子的过程管理。为在 chalcogenide 超点阵提取异种接口的散布声子的贡献,单人赛水晶的双性人 2 Se 3/In2 有最小化的缺点的 Se 3(BS/IS ) 超点阵被分子的横梁取向附生在 fluorophlogopite 云母上准备。BS/IS 超点阵的跨飞机的进行热的性质被表明精确取决于时期厚度和超点阵的成分,在在热传导性的最小显示一条转线路从的地方对在超点阵的像波浪的声子运输像粒子。BS/IS 超点阵的热传导性的最小比内在的 BS 电影的低将近一个数量级。Wuyang Ren Handong Li Lei Gao Yong Li Zhongyang Zhang Chengjia Long Haining Ji Xiaobin Niu Yuan Lin Zhiming Wang 2017Nano Research2017,10,1:1
7Recent Advances in 2D Lateral Heterostructures显示文摘Recent developments in synthesis and nanofabrication technologies offer the tantalizing prospect of realizing various applications from twodimensional(2D)materials.A revolutionary development is to flexibly construct many different kinds of heterostructures with a diversity of 2D materials.These 2D heterostructures play an important role in semiconductor and condensed matter physics studies and are promising candidates for new device designs in the fields of integrated circuits and quantum sciences.Theoretical and experimental studies have focused on both vertical and lateral 2D heterostructures;the lateral heterostructures are considered to be easier for planner integration and exhibit unique electronic and photoelectronic properties.In this review,we give a summary of the properties of lateral heterostructures with homogeneous junction and heterogeneous junction,where the homogeneous junctions have the same host materials and the heterogeneous junctions are combined with different materials.Afterward,we discuss the applications and experimental synthesis of lateral 2D heterostructures.Moreover,a perspective on lateral 2D heterostructures is given at the end.Jianwei Wang Zhiqiang Li Haiyuan Chen Guangwei Deng Xiaobin Niu 2019Nano-Micro Letters2019,11,3:1
8Application of PCA-Based Fault Detection in Power Plant Process显示文摘NIU Zheng NIU Yuguang Huang Xiaobin and LIU Jizhen 2004Progress in Safety Science And Technology2004,4,10:1
9Vacancy defect modulation in hot-casted NiOx film for efficient inverted planar perovskite solar cells显示文摘Nickel oxide(NiOx)has exhibited great potential as an inorganic hole transport layer(HTL)in perovskite solar cells(PSCs)due to its wide optical bandgap and superior stability.In this study,we have modulated the Ni26 vacancies in NiOx film by controlling deposition temperature in a hot-casting process,resulting the change of coordination structure and charge state of NiOx.Moreover,the change of the HOMO level of NiOx makes it more compatible with perovskite to decrease energy losses and enhance hole carrier injection efficiency.Besides,the defect modulation in the electronic structure of NiOx is beneficial for increasing the electrical conductivity and mobility,which are considered to achieve the balance of charge carrier transport and avoid charge accumulation at the interface between perovskite and HTL effectively.Both experimental analyses and theoretical calculations reveal the increase of nickel vacancy defects change the electronic structure of NiOx by increasing the ratio of Ni3^+/Ni2^+-and improving the p-type characteristics.Accordingly,an optimal deposition temperature at 120℃enabled a 36.24%improvement in the power conversion efficiency compared to that deposited at room temperature(25℃).Therefore,this work provides a facile method to manipulate the electronic structure of NiOx to improve the charge carrier transport and photovoltaic performance of related PSCs.Aili Wang Zhiyuan Cao Jianwei Wang Shurong Wang Chengbo Li Nuo Li Lisha Xie Yong Xiang Tingshuai Li Xiaobin Niu Liming Ding Feng Hao 2020Journal of Energy Chemistry2020,29,9:1
10Antarcticite, a Phase Change Material for ThermalEnergy Storage: Experiments and Simulation显示文摘Antarcticite, a mineral with composition CaCl2·6H2O and structure P321, is an ideal phase change material (PCM) due to the high energy storage density and good thermal conductivity. However, the existence of supercooling and incongruent melting would weaken its thermal properties and then hinder its application. In this paper, based on the cooling curve method and DSC measurement, we experimentally selected the minor SrCl2·6H2O as the nucleator and carboxyl methyl cellulose as the thickening agent, which could significantly reduce supercooling and partly restrain the incongruent melting. Moreover, we incorporated Antarcticite as PCM into building envelopes in four different cases, the simulation of the heat transfer processes showed that the temperature fluctuation could be reduced to about 2℃ in the best case.GU Xiaobin NIU Jingjing QIN Shan 2013矿物学报2013,33,S1:1
11Misfit strains inducing voltage decay in LiMn_(y)Fe_(1-y)PO_(4)/C显示文摘LiMn_(y)Fe_(1-y)PO_(4) is considered a promising cathode material for next-generation lithium-ion batteries(LIBs) due to its high energy density and low cost. Its energy density degradation is often ascribed to the capacity loss during cycling. However, in this study, we find that the energy density degradation mainly roots in voltage decay. We have synthesized a series of LiMn_(y)Fe_(1-y)PO_(4) /C(0.5 ≤ y ≤ 0.8) and find this voltage decay is correlated with the Mn content. A high amount Mn leads to a heavier voltage decay.In-situ X-ray diffraction(XRD) and high-resolution transmission electron microscopy(HRTEM) reveal the nature of this effect, which show a mismatch along the b-axis of-2.68%(charge) and +3.4%(discharge), a volume misfit of-4.41%(charge) and +4.54%(discharge) between Li_(x)Mn_(y)Fe_(1-y)PO_(4) and Mn_(y)Fe_(1-y)PO_(4) during phase transitions. The resultant misfit strains during Li+insertion compared to extraction result in structural degradations, such as amorphization and impurity(Mn F3) accumulation after cycling. The voltage decay can be alleviated by kinetic relaxations and recovered by a wild reannealing. This work demonstrates effective strategies to improve the energy density and cycling performance of LiMn_(y)Fe_(1-y)PO_(4) /C,providing good references for other LIB cathodes, such as the Li-rich cathodes.Chun Luo Yao Jiang Xinxin Zhang Chuying Ouyang Xiaobin Niu Liping Wang 2022Journal of Energy Chemistry2022,31,5:1
12Li/C composites as anodes for high energy density rechargeable Li batteries显示文摘Current lithium (Li) ion batteries consisting of graphite as the anode and intercalation materials (such as LiCoO2, LiNixCoyMn1-x-yO2, LiNi0.8Co0.1Al0.1O2) as the cathodes have almost reached their theoretical energy density of 300 Wh/kg. As a result, exploring high energy density batteries is urgent. Li-metal taking place of the graphite as the anode has several advantages. On one hand, it has a low operational voltage (-3.04 V versus standard hydrogen electrode) and a high specific capacity of 3860 mAh/g offering the battery with high energy density. On the other hand, when the Li-metal as the anode, the cathodes can be extended to Li-free or Li-deficient materials, which means the cathodes have more choices. For instance, S, O2, conversion reaction-type materials can be optional. While, the introduction of Li-metal anodes brings in several challenges [1–3]. Firstly, Li-metal is highly electrochemical and electrochemical active to have undesirable reactions with conventional carbonate-based liquid electrolytes, leading a low Coulombic efficiency and large polarizations. Secondly, the formed Li dendrites due to uneven Li+ distribution during plating and stripping has the chances of percolating separators leading to short circuits. Thirdly, Li metal is a host-free material (~5 μm have a capacity of 1 mAh/cm2), thus it suffers from a huge volume change, which brings in difficulty in the cell design.Liping Wang Cheng Jiang Xiaobin Niu 2019Journal of Semiconductors2019,40,4:1
13Fluorinated soft carbon as an ultra-high energy density potassium-ion battery cathode enabled by a ternary phase K_(x)FC显示文摘Fluorinated carbons(CFx)have been widely applied as lithium primary batteries due to their ultra-high energy density.It will be a great promise if CFx can be rechargeable.In this study,we rationally tune the C-F bond strength for the alkaline intercalated CFx via importing an electronegative weaker element K instead of Li.It forms a ternary phase K_(x)FC instead of two phases(LiF+C)in lithium-ion batteries.Meanwhile,we choose a large layer distance and more defects CFx,namely fluorinated soft carbon,to accommodate K.Thus,we enable CFx rechargeable as a potassium-ion battery cathode.In detail fluorinated soft carbon CF_(1.01) presents a reversible specific capacity of 339 mA h g^(-1)(797 Wh kg^(-1))in the 2nd cycle and maintains 330 mA h g^(-1)(726 Wh kg^(-1))in the 15th cycle.This study reveals the importance of tuning chemical bond stability using different alkaline ions to endow batteries with rechargeability.This work provides good references for focusing on developing reversible electrode materials from popular primary cell configurations.Pengyu Chen Bojun Wang Zhenrui Wu Xiaobin Niu Chuying Ouyang Hong Li Liping Wang 2023Journal of Energy Chemistry2023,,2:0
14Copper diffusion related phase change and voltage decay in CuS cathode显示文摘Copper sulfide(CuS)is a promising cathode for lithium-ion batteries(LIBs)due to its impeccable theoretical energy density(~1015 Wh·kg^(−1) and 4743 Wh·L^(−1)).However,it suffers from voltage decay leaded energy density loss and low energy efficiency,which hinders its application.In this work,with combined ex-situ/in-situ X-ray diffraction(XRD)and electrochemical analysis,we explore detailed degradation mechanisms.For the voltage decay,it is attributed to a spontaneous reaction between CuS cathode and copper current collector(Cu CC).This reaction leads to energy density loss and active materials degradation(CuS→Cu_(1.81)S).As for energy efficiency,CuS undergoes a series of phase transformations.The main phase transition processes are CuS→α-LiCuS→Li_(2−x)Cu_(x)S+Cu→Li_(2)S+Cu for discharge;Li_(2)S+Cu→Li_(2−x)Cu_(x)S→β-LiCuS→CuS for charge.Here,α-LiCuS,β-LiCuS,and Li_(2−x)CuxS are newly identified phases.These phase changes are driven by topotactic-reaction-related copper diffusion and rearrangement.This work demonstrates the significance of transition-metal diffusion in the intermediates formation and phase change in conversion-type materials.Jian Zou Zhenrui Wu Ruilin Tang Zhenzhen Ren Xiaobin Niu Liping Wang 2023Nano Research2023,16,6:0
15In-situ construction of Li4Ti5O12/rutile TiO2 heterostructured nanorods for robust and high-power lithium storage显示文摘Li4Ti5O12 is considered as a safe and stable anode material for high-power lithium-ion batteries due to its“zero-strain”characteristic during the charge/discharge.However,the intrinsically low electronic conductivity leads to a deterioration in highrate performance,impeding its intensive application.Herein,the Li4Ti5O12/rutile TiO2(LTO/RT)heterostructured nanorods with tunable oxide phases have been in-situ fabricated by annealing the electrospun nanofiber precursor.By constructing such a heterostructured interface,the as-prepared sample delivers a high capacity of 160.3 mAh·g–1 at 1 C after 200 cycles,125.5 mAh·g–1 at 10 C after 500 cycles and a superior capacity retention of 90.3%after 1,000 cycles at 30 C,outperforming the heterostructure-free counterparts of pure LTO,RT and the commercial LTO product.Density Functional Theory calculation suggests a possible synergistic effect of the LTO/RT interface that would improve the electronic conductivity and Li-ion diffusion.Yiguang Zhou Shuhao Xiao Jinxia Jiang Rui Wu Xiaobin Niu Jun Song Chen 2023Nano Research2023,16,1:0
16Lithium-ion and solvent co-intercalation enhancing the energy density of fluorinated graphene cathode显示文摘Fluorinated carbons CF_xhold the highest theoretical energy density(e.g.,2180 W h kg^(-1)when x=1)among all cathode materials of lithium primary batteries.However,the low conductivity and severe polarization limit it to achieve its theory.In this study,we design a new electrolyte,namely 1 M LiBF_(4)DMSO:DOL(1:9 vol.),achieving a high energy density in Li/CF_xprimary cells.The DMSO with a small molecular size and high donor number successfully solvates Li^(+)into a defined Li^(+)-solvation structure.Such solvated Li^(+)can intercalate into the large-spacing carbon layers and achieve an improved capacity.Consequently,when discharged to 1.0 V,the CF_(1.12)cathode demonstrates a specific capacity of 1944 m A h g^(-1)with a specific energy density of 3793 W h kg^(-1).This strategy demonstrates that designing the electrolyte is powerful in improving the electrochemical performance of CF_(x) cathode.Hao Wang Jie Jiang Pengyu Chen Zhenrui Wu Xiaobin Niu Chuying Ouyang Jian Liu Liping Wang 2024Journal of Energy Chemistry2024,89,2:0
17Highly Efficient Na+ Storage in Uniform Thorn Ball-Like α-MnSe/C Nanospheres显示文摘Because of its high theoretical capacity,MnSe has been identified as a promising candidate as the anode material for sodiumion batteries.However,its fast capacity deterioration due to the huge volume change during the intercalation/deintercalation of sodium ions severely hinders its practical application.Moreover,the sodium storage mechanism of MnSe is still under discussion and requires in-depth investigations.Herein,the unique thorn ball-likeα-MnSe/C nanospheres have been prepared using manganese-containing metal organic framework(Mn-MOF)as a precursor followed by in situ gas-phase selenization at an elevated temperature.When serving as the anode material for sodium-ion battery,the as-preparedα-MnSe/C exhibits enhanced sodium storage capabilities of 416 and 405 mAh g^(-1)at 0.2 and 0.5 A g^(-1)after 100 cycles,respectively.It also shows a superior capacity retention of 275 mA h g^(-1)at 10 A g^(-1)after 2000 cycles,and a rate performance of 279 mA h g^(-1)at 20 A g^(-1).Such sodium storage properties could be attributed to the unique structure offering a highly efficient Na+diffusion kinetics with a diffusion coefficient between 1×10^(-11) and 3×10^(-10) cm^(2) s-1.The density functional theory calculation indicates that the fast Na+diffusion mainly takes place on the(100)plane of MnSe along a V-shaped path because of a relatively low diffusion energy barrier of 0.15 eV.Zhenzhe Li Shuhao Xiao Jiawei Liu Xiaobin Niu Yong Xiang Tingshuai Li Jun Song Chen 2021Acta Metallurgica Sinica(English Letters)2021,34,3:0
18Young Sinologists: My Story of China显示文摘Steven William Langsford, posGraduate student of the University of A&laide of Australia, started to learn Chinese in middle school and has the dream of working as a literary translator. In early July, together with 31 young people from 26 countries, he came to China to participate m the "visiting program for young sinologists 2016". On July 22nd; the program was Wrapped up: Now, each Of them has their own story of China.Jiang Xiaobin Niu Gengshi 2016China & The World Cultural Exchange2016,82,8:0
19Tailoring the interactions of heterostructured Ni_(4)N/Ni_(3)ZnC_(0.7)for efficient CO_(2)electroreduction显示文摘Electrocatalytic CO_(2)reduction into CO has been regarded as one of the most promising strategies for sustainable carbon cycles at ambient conditions,but still faces challenges to achieve both high product selectivity and large current density.Here,we report a Ni_(4)N/Ni_(3)ZnC_(0.7)heterostructured electrocatalyst embedded in accordion-like N-doped carbon through a simple molten salt annealing strategy.The optimal Ni_(4)N/Ni_(3)ZnC_(0.7)electrocatalyst achieves a high CO Faraday efficiency of 92.3%and a large total current density of-15.8 m A cm^(-2)at-0.8 V versus reversible hydrogen electrode,together with a long-term stability about 30 h.Density functional theory results reveal that the energy barrier for*COOH intermediate formation largely decreased on Ni_(4)N/Ni_(3)ZnC_(0.7)heterostructure compared with Ni_(4)N and Ni_(3)ZnC_(0.7),thus giving rise to enhanced activity and selectivity.A rechargeable Zn-CO_(2)battery is further assembled with Ni_(4)N/Ni_(3)ZnC_(0.7)catalyst as the cathode,which shows a maximum power density of 0.85 mW cm^(-2)and excellent stability.Junjie Wang Zhao Li Zhaozhao Zhu Jinxia Jiang Yulan Li Jinju Chen Xiaobin Niu Jun Song Chen Rui Wu 2022Journal of Energy Chemistry2022,,12:0
20A novel homozygous splice variant in DNAAF4 is associated with asthenozoospermia显示文摘Primary ciliary dyskinesia(PCD)is an autosomal recessive disorder with a high degree of genetic and phenotypic heterogeneity resulted from defects in the structural characteristics and motility of flagella and cilia[1].To data,over 50 mutations have been identified as harboring PCD-related mutations,and approximately half of the affected patients suffer from infertility as a result of sperm morphological or functional abnormalities[2].Xiaobin Zhu Chen Chen Jian Song Shijue Dong Xuhui Zeng Zhihong Niu Yanwei Sha Xiaoning Zhang 2023Acta Biochimica et Biophysica Sinica2023,55,10:0
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