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In situ regulating intimately connected heterostructure by decomposition of solid solution oxides toward high-efficient water oxidation

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Rare Metals 2024年第4期43卷 1557-1569页

作者： Shao-Fei Zhang Xiao-Lu Yin Jin Wang jian-li kang Tian-Tian li Jin-Feng Sun Yong-Qiang Meng jian-jiang Wang Dian-Long Wang Kai-Qiang Qin Hebei Key Laboratory of Flexible Functional Materials/Hebei Key Laboratory of Material Near-Net Forming Technology School of Materials Science and EngineeringHebei University of Science and TechnologyShijiazhuang050018China Key Laboratory of Advanced Ceramics and Machining Technology/Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin300072China Electrochemical Engine Center Department of Mechanical EngineeringPennsylvania State UniversityUniversity ParkPA16802USA

Heterogeneous interfaces produced by interdomain interactions on a nanoscale performs a crucial role in boosting the properties of an electrocatalyst toward oxygen evolution reaction(OER)***,a series of dual-phase electrodes with intimately connected heterointerfaces are prepared by in situ decomposing solid solution oxide of Ni_(x)Co_(y)Fe_(100-x-y)O,which grew on Ni foam massively via an ultrafast combustion ***,with high-reaction kinetics caused by the reduction treatment at 450℃,the less electronegative Fe and Co are more oxyphilic than Ni,which facilitated their co-exsolution and formation of CoFe_2O_4/NiO oxide with enriched oxygen *** from the nanoporous framework,heterojunction structure,and oxygen defects,the self-supporting electrodes present rapid charge/mass transmission and provide abundant active sites for *** optimized sample(R-SNCF4.5)shows low overpotentials of 226 and 324 mV at 10 and100 mA·cm^(-2),a small Tafel slope(46.7 mV·dec^(-1)),and excellent *** assembled R-SNCF4.5//Pt/C/NF electrolyzer demonstrates continuous electrolysis over 50 h at a current density of 10 mA·cm^(-2),under 1.51 *** functional theory(DFT)calculations verify that the strong electronic modulation plays a critical part in the CoFe_2O_4/NiO hybrid by lowering the energy barriers for the ratedetermining steps,and Fe sites are the most active OER sites.

关键词： Rapid combustion Decomposition of solid solution oxide Dual-phase heterostructure Oxygen evolution reaction Theoretical calculation

Tuning dual three-dimensional porous copper/graphite composite to achieve diversified utilization of copper current collector for lithium storage

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Rare Metals 2021年第10期40卷 2802-2809页

作者： Xia Ma Zhi-Jia Zhang Jia-Min Wang Shi-Hao Sun Shao-Fei Zhang Shen Yuan Zhi-Jun Qiao Zhen-Yang Yu jian-li kang Wei-Jie li State Key Laboratory of Separation Membrane and Membrane Processes Tianjin Municipal Key Laboratory of Advanced Fibers and Energy StorageSchool of Materials Science and EngineeringSchool of Mechanical EngineeringTiangong UniversityTianjin 300387China School of Materials Science and Engineering Tianjin UniversityTianjin 300072China School of Materials Science and Engineering Hebei Key Laboratory of Material Near-Net Forming TechnologyHebei University of Science&TechnologyShijiazhuang 050018China Institute for Superconducting and Electronic Materials University of WollongongWollongongNSW 2522Australia

Graphite anode materials are widely used in commercial lithium-ion batteries;however, the long electron/ion transportation path restricted its high energy storage. In this experiment, we designed a copper/graphite composite with a dual three-dimensional(3 D) continuous porous structure combining used nonsolvent-induced phase separation and heat treatment, in which a large amount of graphite is embedded in the 3 D porous copper/carbon architecture. In the novel structure, not only the electron and li^(+) transmission performances are improved, but also the space of current collector is fully utilized. Meanwhile,carbonized polyacrylonitrile network stabilizes the interface between graphite and copper matrix. The obtained copper/graphite composite anode has an initial discharge capacity of 524.6 mAh·g^(-1), a holding capacity of350 mAh·g^(-1) and excellent cycle stability(299.3 mAh·g^(-1) after 180 cycles at 0.1 C rate), exhibiting good electrochemical performance. The experimental results show that the mass loading of the copper/graphite composite electrode material is about 4.39 mg·cm^(-2). We also envisage replacing graphite with other high-capacity active materials to fill the current collector, which can provide a reference for the future development of next-generation advanced electrodes.

关键词： Graphite anode Copper current collector Dual three-dimensional porous Nonsolvent-induced phase separation Heat treatment

利用数值模拟研究表面增强相干反斯托克斯拉曼散射增强基底

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物理学报 2021年第10期70卷 167-172页

作者：李健康李睿大连理工大学物理系大连116024

为表面增强相干反斯托克斯拉曼散射(surface enhancement coherent anti-Stokes Raman scattering,SECARS)提供具有高增强、稳定性好的等离激元增强基底是十分重要的.本文从实际出发,在理论上设计了一种新的SECARS基底,其可以利用结构... 详细信息

为表面增强相干反斯托克斯拉曼散射(surface enhancement coherent anti-Stokes Raman scattering,SECARS)提供具有高增强、稳定性好的等离激元增强基底是十分重要的.本文从实际出发,在理论上设计了一种新的SECARS基底,其可以利用结构自身的杂化共振与额外激发的电荷转移等离子体共振相互作用产生Fano共振,并通过调节电荷转移等离子体共振来改变Fano共振的波长位置.通过对L-色氨酸1557 cm^(-1)处的拉曼模式的数值模拟得到的数据表明,这种具有空间对称性的结构可以产生多个不依赖入射光偏振方向的高增强热点,这些热点处的信号相对于普通相干反斯托克斯拉曼散射(coherent anti-Stokes Raman scattering,CARS)信号,其增强因子普遍可以达到10^(12),最大处可达到10^(14).这种利用电荷转移等离子体来设计基底的方法可以在SECARS的实用性基底中得到应用并为其他非线性光学工艺的设计提供了新的思路.

关键词：表面增强相干反斯托克斯拉曼散射拉曼散射表面等离激元共振

Nonsolvent-induced phase separation-derived TiO_(2) nanotube arrays/porous Ti electrode as high-energy-density anode for lithium-ion batteries

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Rare Metals 2021年第2期40卷 393-399页

作者： Zhi-Jia Zhang Jun Zhao Zhi-Jun Qiao Jia-Min Wang Shi-Hao Sun Wen-Xing Fu Xi-Yuan Zhang Zhen-Yang Yu Yu-Hai Dou jian-li kang Ding Yuan Yue-Zhan Feng jian-Min Ma State Key Laboratory of Separation Membrane and Membrane Processes Tianjin Municipal Key Laboratory of Advanced Fibers and Energy StorageSchool of Materials Science and EngineeringSchool of Mechanical EngineeringTiangong UniversityTianjin300387China Centre for Clean Environment and Energy Gold Coast CampusGriffith UniversityGold Coast4222Australia Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou450002China Key Laboratory for Micro-/Nano-Optoelectronic Devices Ministry of EducationSchool of Physics and ElectronicsHunan UniversityChangsha410022China

TiO_(2) nanotube arrays,growing on three-dimensional(3 D)porous Ti membrane,were synthesized using a facile nonsolvent-induced phase separation and anodization *** length of those three-dimensional nanotube arrays could be tuned by prolonging the anodizing *** the anodizing time is 8 h,the three-dimensional TiO_(2) nanotube arrays/porous Ti electrode exhibits well cycling stability and ultra-high specific capacity,which is used in lithium-ion batteries,attributed to the high utilization rate of the substrate and the high growth intensity of the active ***-dimensional TiO_(2) nano tube arrays/porous Ti electrode,at 100μA·cm^(-2) with 8 h anodizing time,shows a typical discharge plateau at 1.78 V and exhibits the specific capacity with 2126.7μAh·cm^(-2),The novel nanotube arrays@3 D porous architecture effectively shortens the electron/ion transmission path,which could pave way for optimizing the design of highperformance anode materials for next-generation energy storage system.

关键词： TiO2 nanotube arrays Nonsolvent-induced phase separation Anodization Anode lithium-ion battery

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基于直觉正态模糊集结算子的多准则决策方法

系统工程理论与实践 2013年第6期33卷 1501-1508页

作者：王坚强李康健中南大学商学院长沙410083

定义了直觉正态模糊数及其运算法则、Euclidean距离、直觉正态模糊加权算术平均算子和直觉正态模糊加权几何平均算子.针对准则值为直觉正态模糊数而权重信息不完全的多准则决策问题,提出了一种基于直觉正态模糊集结算子的决策方法.该方... 详细信息

定义了直觉正态模糊数及其运算法则、Euclidean距离、直觉正态模糊加权算术平均算子和直觉正态模糊加权几何平均算子.针对准则值为直觉正态模糊数而权重信息不完全的多准则决策问题,提出了一种基于直觉正态模糊集结算子的决策方法.该方法首先利用各方案之间的距离和最小化思想建立优化模型求得最优权重,然后利用集结算子对各准则进行集结,从而得到各方案的综合评价值,最后通过比较它们跟正负理想方案间的相对贴近度的大小,得到方案集的排序.实例表明该方法的有效性和可行性.

关键词：多准则决策直觉正态模糊数直觉正态模糊集结算子

不同衬底上Pb(Zr_(0.52)Ti_(0.48))O_3择优取向铁电薄膜的制备和研究

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物理学报 2005年第6期54卷 2938-2944页

作者：李建康姚熹苏州科技学院电子与信息工程系苏州215011 西安交通大学电子材料研究所西安710049

通过MOD法在Si(100)和Pt(111)Ti SiO2Si基片上制备出LaNiO3(LNO)薄膜.再通过修正的Sol gel法,在Pt(111)Ti SiO2Si,LNO Si(100)和LNO Pt Ti SiO2Si三种衬底上制备出具有择优取向的Pb(Zr0.52Ti0.48)O3铁电薄膜.经XRD分析表明,LNO薄膜具有(100)择优取向的类钙钛矿结构;PZT薄膜均具有钙钛矿结构,且在Pt(111)Ti SiO2Si衬底上的薄膜以(110)择优取向,在LNO Pt Ti SiO2Si和LNO Si(100)衬底上的薄膜以(100)择优取向.经场发射SEM分析和介电、铁电性能测试表明,在LNO Si和LNO Pt Ti SiO2Si衬底上的PZT薄膜的平均粒径、介电常数以及剩余极化强度均比以Pt Ti SiO2Si为衬底的薄膜大.

关键词：镍酸镧薄膜 PZT铁电薄膜择优取向剩余极化强度

Pb(Zr_x,Ti_(1-x))O_3成分梯度铁电薄膜的制备、结构及电性能表征

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红外与毫米波学报 2005年第4期24卷 250-254页

作者：李建康姚熹苏州科技学院电子与信息工程系江苏苏州215011 西安交通大学电子材料研究所陕西西安710049

采用Sol-Gel方法,通过快速热处理,在Pt/Ti/SiO2/Si衬底上制备出Pb(Zrx,Ti1-x)O3成分梯度薄膜.经俄歇微探针能谱仪(AES)对制备的“上梯度”薄膜进行了成分深度分析,结果证实其成分梯度的存在.经XRD分析表明,制备的梯度薄膜为四方结构和... 详细信息

采用Sol-Gel方法,通过快速热处理,在Pt/Ti/SiO2/Si衬底上制备出Pb(Zrx,Ti1-x)O3成分梯度薄膜.经俄歇微探针能谱仪(AES)对制备的“上梯度”薄膜进行了成分深度分析,结果证实其成分梯度的存在.经XRD分析表明,制备的梯度薄膜为四方结构和三方结构的复合结构,但其晶面存在一定的结构畸变.经介电频谱测试表明,梯度薄膜的介电常数比每个单元的介电常数都大,但介电损耗相近.在10kHz时,上、下梯度薄膜的介电常数分别为206和219.经不同偏压下电滞回线的测试表明,上、下梯度薄膜均表现出良好的铁电性质,其剩余极化强度Pr分别为24.3和26.8μC·cm-2.经热释电性能测试表明,热释电系数随着温度的升高逐渐增加,室温下上、下梯度薄膜的热释电系数分别为5.78和4.61×10-8C·cm-2K-1,高于每个单元的热释电系数.

关键词：成分梯度薄膜锆钛酸铅快速热处理热释电系数

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发动机缸体离散数学模型的研究

内燃机学报 2000年第2期18卷 180-182页

作者：李建康江苏理工大学数理系镇江212013

对建立发动机缸体有限元计算模型的方法进行了研究。提出了将发动机缸体有限元计算模型参数与试验实测参数进行相关分析的方法。即以有限元计算响应与试验响应进行相关分析 ,并根据响应相关分析结果修改有限元计算模型。反复此步骤 ,可... 详细信息

对建立发动机缸体有限元计算模型的方法进行了研究。提出了将发动机缸体有限元计算模型参数与试验实测参数进行相关分析的方法。即以有限元计算响应与试验响应进行相关分析 ,并根据响应相关分析结果修改有限元计算模型。反复此步骤 ,可使有限元计算模型的可靠性提高。

关键词：离散数学模型发动机缸体有限元模型相关分析

在LaNiO_3-Pt复合电极上Pb(Zr,Ti)O_3铁电薄膜及其成分梯度薄膜的制备和研究

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无机化学学报 2005年第5期21卷 757-762页

作者：李建康姚熹苏州科技学院电子与信息工程系苏州215011 西安交通大学电子材料研究所西安710049

LaNiO3 (LNO) thin films were prepared on Pt(111) / Ti / SiO2 / Si substrate by metal-organic decomposition (MOD) method. Pb(Zr,Ti)O3 ferroelectric thin films and their compositionally graded thin films were prepared on LNO / Pt / Ti / SiO2 /Si substrates by Sol-gel method. The composition depth profile of a typical up-graded film was determined by using a combination of Auger Electron Spectroscopy (ASE) and Ar Ion Etching. The results confirm that the processing method produces graded composition changes. XRD analysis showed that the graded thin films possessed composite structure of tetragonal and rhombohedral. The dielectric constants of Up-graded and Down-graded thin films were higher than that of each thin film unit. The dielectric constants were 277 and 269 at 10 kHz, respectively. The loss tangents were 0.019 and 0.018 at 10 kHz, respectively. The Hysteresis loops showed that the remanent polarizations of graded thin films were higher than that of each thin film unit, but the coercive fields were smaller. The remanent polarizations of Up-graded and Down-graded thin films were 30.06 and 26.96 μC·cm-2, respectively. The coercive fields were 54.14, 54.23 kV·cm-1, respectively. The pyroelectric coefficients of Up-graded and Down-graded thin films were 4.62, 2.51×10-8 C·cm-2·K-1 at room temperature, respectively. They were higher than that of each thin film unit.

关键词：复合电极梯度薄膜铁电薄膜 analysis Sol-gel profile 制备成分 LaNiO3 and The the unit room met was Ion XRD at