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The origins of kinetics hysteresis and irreversibility of monoclinic Li_(3)V_(2)(PO_(4))_(3)

journal of Energy Chemistry 2022年第4期31卷 593-603页

作者： Hua Huo Zeyu Lin Guiming Zhong Shuaifeng Lou jiajun Wang Yulin ma Changsong Dai Yueping Xiong Geping Yin Yong Yang Key Laboratory of materials for New Energy Conversion and Storage(Ministry of Industry and Information Technology) School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina State Key Laboratory for Physical Chemistry of Solid Surface and Department of Chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Xiamen Institute of Rare Earth materials Haixi InstitutesChinese Academy of SciencesXiamen 361021FujianChina

Monoclinic Li_(2)V_(2)(PO_(4))_(3);is a promising cathode material with complex charge–discharge *** structural investigation of this compound mainly focuses on local environments;while the reaction kinetics and the driving force of irreversibility of this material remain *** fully understand the above issues,both the equilibrium and the non-equilibrium reaction routes have been systematically investigated in this *** characterization techniques including X-ray diffraction,variable temperature(spinning rate)and ex/in situ ^(7)Li,^(31)P solid state NMR have been employed to provide comprehensive insights into kinetics,dynamics,framework structure evolution and charge ordering,which is essential to better design and application of lithium transition metal phosphate *** results suggest that the kinetics process between the non-equilibrium and the quasi-equilibrium delithiation pathways from Li_(2)V_(2)(PO_(4))_(3);to V_(2)(PO_(4))_(3);is related with a slow relaxation from two-site to one-site *** importantly,it has been demonstrated that the irreversibility in this system is not solely affected by cation and/or charge ordering/disordering,but mainly driven by framework structure distortion.

关键词： NMR spectroscopy Electrochemistry Solid-state structures Kinetics

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Double Side Interfacial Optimization for Low-Temperature Stable CsPbI_(2)Br Perovskite Solar Cells with High Efficiency Beyond 16%

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Energy & Environmental materials 2022年第2期5卷 637-644页

作者： jing ma jie Su Zhenhua Lin jian He Long Zhou Tao Li jincheng Zhang Shengzhong Liu jingjing Chang Yue Hao State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Shaanxi Joint Key Laboratory of GrapheneSchool of MicroelectronicsXidian UniversityXi’an 710071China Advanced Interdisciplinary Research Center for Flexible Electronics Xidian UniversityXi’an 710071China Centre for Spintronics and Quantum System State Key Laboratory for Mechanical Behavior of MaterialsSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China

CsPbI_(2)Br perovskite solar cells have achieved rapid development owing to their exceptional optoelectronic properties and relatively outstanding ***,open-circuit voltage(Voc)loss caused by band mismatch and charge recombination between perovskite and charge transporting layer is one of the crucial obstacles to further improve the device ***,we proposed a bilayer electron transport layer ZnO(bottom)/SnO_(2)(top)to reduce the Voc loss(Eloss)and promote device Voc by ZnO insert layer thickness modulation,which could improve the efficiency of charge carrier extraction/transfer and suppress the charge carrier *** addition,guanidinium iodide top surface treatment is used to further reduce the trap density,stabilize the perovskite film and align the energy levels,which promotes the fill factor,short-circuit current density(jsc),and stability of the *** a result,the champion cell of double-side optimized CsPbI_(2)Br perovskite solar cells exhibits an extraordinary efficiency of 16.25%with the best Voc as high as 1.27 V and excellent thermal and storage stability.

关键词： CsPbI_(2)Br dual interfacial optimization high performance low temperature perovskite solar cells

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Secondary crystallization strategy for highly efficient inorganic CsPbI_(2)Br perovskite solar cells with efficiency approaching 17%

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journal of Energy Chemistry 2021年第12期30卷 558-565,I0013页

作者： jing ma Zhenhua Lin Xing Guo Long Zhou jian He Zhou Yang jincheng Zhang Yue Hao Shengzhong Liu jingjing Chang State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Shaanxi Joint Key Laboratory of GrapheneSchool of MicroelectronicsXidian University2 South Taibai RoadXi’an 710071ShaanxiChina Advanced Interdisciplinary Research Center for Flexible Electronics Xidian University2 South Taibai RoadXi’an 710071ShaanxiChina Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina

Inorganic CsPbI_(2) Br perovskite solar cells(PSCs) have a tremendous development in last few years due to the trade-off between the excellent optoelectronic properties and the relatively outstanding ***,we demonstrated a strategy of secondary crystallization(SC) for CsPbI_(2) Br film in a facile planar n-i-p structure(ITO/ZnO-SnO_(2)/CsPbI_(2) Br/Spiro-OMeTAD/Ag) at low-temperature(150℃).It is achieved through the method of post-treatment with guanidinium bromine(GABr) atop annealed CsPbI_(2) Br *** was found that the secondary crystallization by GABr can not only regulate the crystal growth and passivate defects,but also serve as a charge collection center to effectively collect photogenerated *** addition,due to the excess Br ions in GABr,the formation of the Br-rich region at the CsPbI_(2) Br perovskite surface can further lower the Fermi level,leading to more beneficial band alignment between the perovskite and the hole transport layer(HTL),while the phase stability was also *** a result,the champion cell shows a superb open-circuit voltage(V_(oc)) of 1.31 V,a satisfactory power conversion efficiency(PCE) of 16.97% and outstanding *** far as we know,this should be one of the highest PCEs reported among all-inorganic CsPbI_(2) Br based PSCs.

关键词： CsPbI_(2)Br Low temperature Secondary crystallization High performance

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Synthesis,Crystal Structure and DNA-Binding Property of a New Cu(Ⅱ) Complex Based on 4-(Trifluoro-methyl)nicotinic Acid

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Chinese journal of Structural Chemistry 2022年第2期41卷 57-63,I0008页

作者： SHAN Feng-Lin SONG Huan GAO Xue-Zhi LI Bing ma Xiao-Xia State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China Department of Chemistry&Chemical Engineering Ningxia UniversityYinchuan 750021China

A new complex[Cu_(1.5)(tfc)_(3)(H_(2)O)_(4)]·3H_(2)O (1,Htfc=4-(trifluoro-methyl) nicotinic acid) has been synthesized and characterized by X-ray single-crystal diffraction,elemental analysis,IR spectra and thermogravimetric analysis.1 belongs to orthorhombic system,space group Pccn with a=44.507(2),b=10.7710(6),c=11.7544(7)?,V=5634.9(6)?^(3),Z=1,D_(c)=1.803 mg·cm^(-3),F(000)=3068,μ=1.266 mm^(-1),the final R=0.0488and w R=0.1103 with I>2σ(I).The Cu(II) ion is coordinated by two N and two O atoms from different Htfc as well as two O atoms from two coordinated water molecules,forming a 0D motif with distorted octahedral *** adjacent 0D units are linked into 2D structures through bridge connection coordination *** addition,the binding properties of the complex with CT-DNA were investigated by fluorescence and ultraviolet *** indicate classical intercalation between the complex and ***,the interactions between the ligand and the complex with CT-DNA were studied by Et Br fluorescence probe,which proved that these compounds bind to CT-DNA through an intercalation *** binding constants were 0.76 and 1.15 for Htfc and complex 1,which means 1 has stronger interaction with CT-DNA than Htfc.

关键词： 4-(trifluoro-methyl)nicotinic acid crystal structure DNA

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Syntheses, Crystal Structures and Antifungal Activities of Two Compounds Containing Pyrazole and Pyrethroid Units

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Chinese journal of Structural Chemistry 2015年第8期34卷 1231-1237页

作者： ZHOU Bao-Han HUA Yun-Tao XU Bao-Ming ma Li HU jia-Wen LIU Zhao-jie School of Chemistry and Chemical Engineering Light Industry Division Hubei University of Technology Key Lab of Pesticide and Chemical Biology Ministry of EducationCentral China Normal University

Compounds 1 （C15H17C1F3N303, Mr = 379） and 2 （C14H14C1F3N4OS, Mr = 378） have been synthesized and their crystal structures were determined by single-crystal X-ray diffraction. Crystal 1 belongs to the triclinic system, space group P1 with a = 6.0223（19）, b = 9.324（3）, c = 15.936（5） A, a = 80.687（5）, β= 87.289（5）, ）, = 86.097（5）°, V= 880.4（5） A3, Z = 2, Dc = 1.433 g/cm3,μ（MoKa） = 0.266 mm^-1, F（000） = 392, R = 0.0861 and wR = 0.1999 for 2022 observed reflections with I 〉 2o（/）. Crystal 2 belongs to the triclinic system, space group PI with a = 7.7029（15）, b = 8.3371（16）, c = 14.410（3） A, a = 100.672（3）, β= 103.168（3）, ？ = 98.726（3）°, V = 876.1（3） A3, Z = 2, Dc= 1.451 g/cm^3,μ（MoKa） = 0.379 mm^-1, F（000） = 388, R = 0.0672 and wR = 0.2105 for 2725 observed reflections with I 〉 2σ（I）. Although the two compounds are similar with the same pyrazole and pyrethroid units, X-ray analysis reveals that their structures are completely different.

关键词： pyrazole, crystal structures, synthesis, antifungal activities

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基于耦合关系挖掘的电力网络错误数据注入检测

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电子设计工程 2025年第1期33卷 127-131页

作者：程力李滢黄玉虎马李思思段伟安徽明生电力投资集团有限公司安徽合肥230071 安徽明生恒卓科技有限公司安徽合肥230031

为了提高电力网络稳定性和脆弱性评估的准确性,以及有效地检测和处理错误数据注入问题,提出了基于耦合关系挖掘的电力网络错误数据注入检测方法。根据电力网络与注入错误数据耦合关系,挖掘电力网络与错误注入数据之间一对一、一对多、... 详细信息

为了提高电力网络稳定性和脆弱性评估的准确性,以及有效地检测和处理错误数据注入问题,提出了基于耦合关系挖掘的电力网络错误数据注入检测方法。根据电力网络与注入错误数据耦合关系,挖掘电力网络与错误注入数据之间一对一、一对多、多对多对应关系。根据耦合关系挖掘结果,构建电力网络错误数据注入检测模型,结合时间更新数据完成电力网络错误数据注入检测。由检测评估结果可知,该方法能够确定所在区域是脆弱区域,与实际区域一致。网络崩溃指数在0.9~1.0范围内波动,与实际模块2所处情况一致,具有精准的检测结果。

关键词：耦合关系挖掘电力网络错误数据注入聚类中心

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A carbon-rich g-C_(3)N_(4) with promoted charge separation for highly efficient photocatalytic degradation of amoxicillin

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Chinese Chemical Letters 2021年第9期32卷 2787-2791页

作者： Dan Huang Xianbo Sun Yongdi Liu Haodong ji Wen Liu Chong-Chen Wang Weiyu ma Zhengqing Cai National Engineering Laboratory for High-concentration Refractory Organic Wastewater Treatment Technologies East China University of Science and TechnologyShanghai 200237China The Key Laboratory of Water and Sediment Sciences Ministry of EducationCollege of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Beijing Key Laboratory of Functional materials for Building Structure and Environment Remediation School of Environment and Energy EngineeringBeijing University of Civil Engineering and ArchitectureBeijing 100044China

A novel carbon-rich g-C_(3)N_(4) nanosheets with large surface area was prepared by facile thermal polymerization method using urea and 1,3,*** of carbon-rich functional groups were introduced into the surface layers of g-C_(3)N_(4),which constructed the built-in electric field(BIEF)and resulted in improved charge separation;therefore,the carbon-rich g-C_(3)N_(4) displayed superior photocatalytic activity for amoxicillin degradation under solar *** contaminant degradation mechanism was proposed based on radical quenching experiments,intermediates analysis and density functional theory(DFT)***,the reusing experiments showed the high stability of the material,and the amoxicillin degradation under various water matrix parameters indicated its high applicability on pollutants treatment,all of which demonstrated its high engineering application potentials.

关键词： Carbon-rich g-C_(3)N_(4) Photocatalysis Built-in electron field Charge separation

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广义参考集DEA模型及其相关性质

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系统工程与电子技术 2012年第4期34卷 709-714页

作者：马占新内蒙古大学经济管理学院内蒙古呼和浩特010021

由于传统数据包络分析(data envelopment analysis,DEA)方法的"评价参照系"是有效决策单元,即传统DEA方法只能获得和有效决策单元比较的信息,而实际上人们需要比较的对象不仅仅限于"优秀单元",还可能是"一般单元"(如录取线)、"较差单元"... 详细信息

由于传统数据包络分析(data envelopment analysis,DEA)方法的"评价参照系"是有效决策单元,即传统DEA方法只能获得和有效决策单元比较的信息,而实际上人们需要比较的对象不仅仅限于"优秀单元",还可能是"一般单元"(如录取线)、"较差单元"(如可容忍的底线)或者某种特殊单元(如选定的样板、标准或某些特定对象),而传统DEA方法无法评价这些问题。为此,给出一种适用于上述所有情况的广义DEA方法,并探讨其相关性质,主要包括基本的广义参考集DEA模型和广义DEA有效性概念;广义DEA有效性含义和广义DEA有效性的判断方法;广义参考集DEA方法与传统DEA方法的区别与联系。

关键词：综合评价数据包络分析多目标决策 Pareto有效解

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Advanced rare earth tantalate RETaO_(4)(RE=Dy,Gd and Sm) with excellent oxygen/thermal barrier performance

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journal of Rare Earths 2024年第8期42卷 1595-1603,I0007页

作者： jun Wang jianyu Li Chunyu jiang jianbo Song Xing Yang Xiaolong ma Kailiang Luo Peng Wu Xiaoyu Chong jing Feng Faculty of material Science and Engineering Kunming University of Science and TechnologyKunming650093China Shanxi Tianxuan Coating Technology Co. LtdXi'an710000China

Thermal barrier coatings(TBCs) materials with lowered the rmal and oxygen ion conductivity can provide thermal and oxidative protection for high te mperature hot-end components in aero nautical engines and gas turbines,The rare-earth tantalate RETaO_(4)(RE=Dy,Gd and Sm) ceramics with monoclinic(m) phase were successfully synthesized via spark plasma *** vacancies responsible for the thermal and oxygen ion conductivities of RETaO_(4) were demonstrated by atomic-resolution energy dispersive Xray and X-ray photoelectron *** the three samples,DyTaO_(4) has excellent oxygen/thermal barrier *** to the current service thermal barrier coating material ZrO_(2)-8 wt% Y_(2)O_(3)(8 YSZ),DyTaO_(4) has an ultra-low oxygen ion conductivity benefiting from low oxygen vacancy concentration and strong stretching force *** intrinsic thermal conductivity of DyTaO_(4)is 68.2% less than that of 8 ***,the thermal expansion rate curves indicate that the phase transformation does not happen from room te mperature to 1200℃.The above results demonstrate that high-growth rate the rmally grown oxide can be retarded by creating dense DyTaO_(4) coating with lowered thermal and oxygen ion conductivity.

关键词： Thermal barrier coatings Rare earths Oxygen vacancies Thermal conductivity Oxygen ion conductivity

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Robust Smooth Time-varying Exponential Stabilization of Dynamic Nonholonomic Mobile Cart with Parameter Uncertainties

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自动化学报 2005年第2期31卷 314-319页

作者：马保离 TheSeventhResearchDivision BeijingUniversityofAeronauticsandAstronauticsBeijing100083

For regulating the dynamic nonholonomic mobile cart with parameter uncertainties, a time-varying robust control law is derived to yield globally exponential convergence of cart's position and orientation to the desired set point. The controller design relies on converting the cart's dynamics to an advantageous form, and the robust linear feedback control laws steer the cart's position and orientation errors to zero exponentially. Simulation results show the effectiveness of the proposed control law.

关键词：参数不确定鲁棒镇定移动小车增强可靠性平滑时变控制

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