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锂离子电池负极材料li_4Ti_5O_(12)的研究进展

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稀有金属材料与工程 2007年第A3期36卷 697-701页

作者：葛昊李宁黎德育哈尔滨工业大学黑龙江哈尔滨150001

"零应变"材料li_4Ti_5O_(12)具有优良的循环性能和平稳的放电电压等优点,与石墨电极相比,其安全性和使用寿命都大大提高。本文介绍了锂离子电池负极材料li_4Ti_5O_(12)的结构与性能,总结了制备方法、制备工艺参数对其性能的影响,对li_4T... 详细信息

"零应变"材料li_4Ti_5O_(12)具有优良的循环性能和平稳的放电电压等优点,与石墨电极相比,其安全性和使用寿命都大大提高。本文介绍了锂离子电池负极材料li_4Ti_5O_(12)的结构与性能,总结了制备方法、制备工艺参数对其性能的影响,对li_4Ti_5O_(12)的掺杂改性作了综述,并对li_4Ti_5O_(12)性能提高的发展方向作了展望。

关键词：锂离子电池负极材料 li4Ti5O12 零应变

To explore the curative effect of CT-guided Iodine-125 radioactive seed implantation in the treatment of stage Ⅳprimary hepatocellular carcinoma

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Journal of Interventional Medicine 2021年第2期4卷 82-86页

作者： Fuqiang Zhang lin Zheng deyu li Hui Yang Department of Nuclear Medicine The Affiliated Cancer Hospital of Zhengzhou UniversityZhengzhou450003China Department of Minimally Invasive&Interventional The Affiliated Cancer Hospital of Zhengzhou University Zhengzhou450003China

Objectives: To explore the clinical efficacy and survival of CT-guided Iodine-125 radioactive seed implantation in the treatment of stage Ⅳ primary hepatocellular ***: A retrospective study of 62 patients with primary hepatocellular carcinoma in our hospital from January2017 to December 2018 [60 males, 2 females, age(52.76 ± 10.82) years old], All patients were implanted with Iodine-125 radioactive seeds under CT guidance, followed up regularly after operation to observe the clinical efficacy, including comparison of changes in cancer size before and after treatment, tumor marker AFP, and improvement in complications such as abdominal pain and ascites. Follow-up 3–36 months to assess patient ***: Among the 62 patients, 3 months after Iodine-125 radioactive seed implantation, 5 cases(8.1%) had complete remission of cancer, 33 cases(53.2%) had partial remission, 12 cases(19.4%) had stable lesions, and 12 cases(19.4%) had disease progression. The effective rate was 61.3%. The tumor volume(31.44 ± 14.51 cm3) was significantly smaller than before(50.96 ± 30.13 cm3)(t=5.303, p lications related to ***: Iodine-125 radioactive seed implantation therapy can safely and effectively treat hepatocellular carcinoma, and

关键词： Iodine-125 Hepatocellular carcinoma Interventional therapy Radioactive seed Brachytherapy

Relationship between triphasic mechanical properties of articular cartilage and osteoarthritic grade

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Science China(life Sciences) 2012年第5期55卷 444-451页

作者： NIU HaiJun liU ChengRui liAng WANG Qing WANG YueXiang li deyu FAN YuBo Key Laboratory of Ministry of Education for Biomechanics and Mechanobiology School of Biological Science and Medical Engineering Beihang University Beijing 100191 China School of Biomedical Engineering Southern Medical University Guangzhou 510515 China Department of Ultrasound People Liberation Army General Hospital Beijing 100853 China

The purpose of this study was to explore the triphasic mechanical properties of osteoarthritic cartilage with different pathological ***,samples of cartilage from rabbits with different stages of osteoarthritis (OA) were *** this,the cartilage was strained by a swelling experiment,and changes were measured using a high-frequency ultrasound *** result,together with fixed charge density and water volume fraction of cartilage samples,was used to estimate the uniaxial modulus of the cartilage tissue,based on a triphasic *** the control cartilage samples,the uniaxial elastic modulus on the cartilage surface was lower than those in the middle and deep *** an increase in the OA grade,the uniaxial elastic modulus of the surface,middle and deep layers decreased.A significant difference was found in the surface elastic modulus of different OA grades (P<0.01),while no significant differences were identified for OA cartilages of Grades 1 and 2 in the middle and deep layers (P<0.01).Compared with Grades 1 and 2,there was a significant reduction in the elastic modulus in the middle and deep layers of Grade 3 OA cartilage (P<0.05).Overall,this study may provide a new quantitative method to evaluate the severity of OA using the mechanical properties of cartilage tissue.

关键词： osteoarthritis grade triphasic theory ultrasound uniaxial modulus

Predictably synthesizing a library of white-light-emitting perovskites

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Science China Chemistry 2023年第3期66卷 760-767页

作者： Ludan Niu lili Zhao deyu li Qian Chen Mingming Zhang Jing Luan Lei Wang Weigao Xu Jun Xing Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science&TechnologyQingdao 266042China Key Laboratory of Mesoscopic Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of Materials Science and Technology Qingdao University of Science&TechnologyQingdao 266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

The low-dimensional organic-inorganic halide perovskites with self-trapped exciton emission have promising prospects for single-phase white-light emitters. However, so far, these broadband white-light-emitting(BWLE) perovskites were synthesized by trial-and-error testing spacing molecules. Here, we developed a steric hindrance regulation strategy to predictably synthesize BWLE perovskites. The molecules containing C–C(–NH_(2))–C groups were introduced into low-dimensional perovskites, which brings a large steric hindrance in-plane orientation. The bigger C–C(–NH_(2))–C bond angle would induce larger structural distortion in perovskites, which leads to the higher rate of self-trapping of excitons and the deeper self-trapping depth. The photoluminescence spectra of the synthesized perovskites can cover the cool-to-warm white light region. Overall, we fabricated a material library consisting of 40 kinds of BWLE compounds according to this strategy. Our findings develop a general strategy to synthesize BWLE perovskites and offer a material platform for optoelectronic applications.

关键词： white-light emission halide perovskite steric hindrance two-dimensional

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桑树桑黄液体发酵及多糖提取工艺优化

黑龙江农业科学 2024年第6期 64-70页

作者：李德毓司豆豆彭浩曹伟刚郑晓芹张升明陕西理工大学生物科学与工程学院陕西汉中723001 陕西省汉中市科技资源统筹中心陕西汉中723001 陕西省汉中市秦巴生态保护中心陕西汉中723001 陕西省西乡县食用菌研究所陕西汉中723500

桑树桑黄是一种具有良好药效的药用多孔菌,其多糖是主要活性成分之一,具有抗肿瘤、抗氧化、免疫调节和其他药理作用。为提高桑树桑黄菌丝体干重及桑黄多糖得率,采用单因素和正交试验对影响桑黄菌丝体干重的培养基配方及液体发酵培养条... 详细信息

桑树桑黄是一种具有良好药效的药用多孔菌,其多糖是主要活性成分之一,具有抗肿瘤、抗氧化、免疫调节和其他药理作用。为提高桑树桑黄菌丝体干重及桑黄多糖得率,采用单因素和正交试验对影响桑黄菌丝体干重的培养基配方及液体发酵培养条件进行优化;利用超声波辅助提取法对桑黄多糖提取工艺条件进行优化。结果表明,桑树桑黄最佳培养基配方为马铃薯(去皮)200 g·L^(-1)、乳糖32 g·L^(-1),胰蛋白胨10 g·L^(-1),NaCl 2.00 g·L^(-1),MgSO 4·7H 2 O 1 g·L^(-1),VB 110.0 mg·L^(-1),获得菌丝体干重为2.82 g·L^(-1)。在温度28℃,接种量9%,转速180 r·min-1,pH6.0条件下,最大菌丝量为3.12 g·L^(-1)。桑黄多糖最佳提取工艺为超声波功率200 W,料液比1∶60 g·mL^(-1),提取时间40 min,温度50℃,此时桑黄多糖得率为5.54%。说明本研究优化的桑树桑黄培养基配方、发酵条件及多糖提取工艺合理、可行。

关键词：桑树桑黄液体发酵多糖超声波辅助提取法

Application of the Conditional Nonlinear Local Lyapunov Exponent to Second-Kind Predictability

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Advances in Atmospheric Sciences 2024年第9期41卷 1769-1786页

作者： Ming ZHANG Ruiqiang DING Quanjia ZHONG Jianping li deyu LU State Key Laboratory of Earth Surface Processes and Resource Ecology(ESPRE)/Key Laboratory of Environmental Change and Natural Disasters of Chinese Ministry of EducationBeijing Normal UniversityBeijing 100875China Department of Ocean Science Hong Kong University of Science and TechnologyHong KongChina College of Oceanic and Atmospheric Sciences/Frontiers Science Center for Deep Ocean Multispheres and Earth System(DOMES)/Key Laboratory of Physical Oceanography Ministry of Education/Academy of the Future Ocean/Center for Ocean Carbon NeutralityOcean University of ChinaQingdao 266100China Laoshan Laboratory Qingdao 266237China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth Science University of Chinese Academy of SciencesBeijing 100049China

In order to quantify the influence of external forcings on the predictability limit using observational data,the author introduced an algorithm of the conditional nonlinear local Lyapunov exponent(CNLLE)*** effectiveness of this algorithm is validated and compared with the nonlinear local Lyapunov exponent(NLLE)and signal-to-noise ratio methods using a coupled Lorenz *** results show that the CNLLE method is able to capture the slow error growth constrained by external forcings,therefore,it can quantify the predictability limit induced by the external *** this basis,a preliminary attempt was made to apply this method to measure the influence of ENSO on the predictability limit for both atmospheric and oceanic variable *** spatial distribution of the predictability limit induced by ENSO is similar to that arising from the initial conditions calculated by the NLLE *** similarity supports ENSO as the major predictable signal for weather and climate *** addition,a ratio of predictability limit(RPL)calculated by the CNLLE method to that calculated by the NLLE method was *** RPL larger than 1 indicates that the external forcings can significantly benefit the long-term predictability *** instance,ENSO can effectively extend the predictability limit arising from the initial conditions of sea surface temperature over the tropical Indian Ocean by approximately four months,as well as the predictability limit of sea level pressure over the eastern and western Pacific ***,the impact of ENSO on the geopotential height predictability limit is primarily confined to the troposphere.

关键词： conditional nonlinear local Lyapunov exponent second-kind predictability coupled Lorenz model ENSO

Synthesis and High Electrocatalytic Performance of Hexagram Shaped Gold Particles Having an Open Surface Structure with Kinks

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Nano Research 2011年第6期4卷 612-622页

作者： Qingning Jiang Zhiyuan Jiang Lei Zhang Haixin lin Ning Yang Huan li deyu liu Zhaoxiong Xie Zhongqun Tian State Key Laboratory for Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University Xiamen 361005 China

Hexagram shaped gold particles and their analogues enclosed by high index facets with kinks have been successfully synthesized by reducing HAuCl4 with ascorbic acid （AA） in the presence of poly（diallyldimethylammonium chloride） at room temperature. By using electron microscopy, the surfaces of the hexagram shaped Au particle were found to be {541} planes, which contain high-density steps and kinks. In addition, it was found that hexagonal shield-like and other kind of particles present in the product were analogues of the hexagram shaped Au particles structure, in that they had the same surface structure. In order to confirm the surface structure of all the prepared particles, surface structure sensitive underpotential deposition of Pb was carried out, and the cyclic voltammetric profile was in accordance with the proposed {541} surface. Finally, structure-property relationships of the Au hexagrams were experimentally analyzed by employing the electrocatalytic oxidation of AA as a probe reaction. The electrocatalytic reactions of gold cubes with low-index {100} facets and gold trioctahedra with {221} facets were studied as references. The experimental results showed that the hexagram shaped Au particles and their analogues with exposed {541} facets have the highest catalytic activity among the three kinds of gold particles, owing to the high density of kink atoms. This study should motivate us to further explore methods for the preparation of other well-defined polyhedral metal nanocrystals enclosed by high index surfaces.

关键词： Hexagram shaped gold particles surface structure high index facets with kinks structure-property relationship electrocatalysis crystal growth

Phononic origin of structural lubrication

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Friction 2023年第6期11卷 966-976页

作者： Yun DONG Yongkang WANG Zaoqi DUAN Shuyu HUANG Yi TAO Xi LU Yan ZHANG Yajing KAN Zhiyong WEI deyu li Yunfei CHEN Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing211189China Department of Mechanical Engineering Vanderbilt UniversityNashville37235-1592USA

Atomistic mechanisms of frictional energy dissipation have attracted significant ***,the dynamics of phonon excitation and dissipation remain elusive for many friction *** systematic fast Fourier transform(FFT)analyses of the frictional signals as a silicon tip sliding over a graphite surface at different angles and velocities,we experimentally demonstrate that friction mainly excites non-equilibrium phonons at the washboard frequency and its *** molecular dynamics(MD)simulations,we further disclose the phononic origin of structural lubrication,i.e.,the drastic reduction of friction force as the contact angle between two commensurate surfaces *** commensurate contacting states,friction excites a large amount of phonons at the washboard frequency and many orders of its harmonics that perfectly match each other in the sliding tip and substrate,while for incommensurate cases,only limited phonons are generated at mismatched washboard frequencies and few low order harmonics in the tip and substrate.

关键词： phononic friction washboard frequency structural lubrication commensurate and incommensurate interfaces

Striking Stabilization Effect of Spinel Cobalt Oxide Oxygen Evolution Electrocatalysts in Neutral pH by Dual-Sites Iron Incorporation

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Energy & Environmental Materials 2024年第2期7卷 152-160页

作者： Shuairu Zhu Xue Wang Jiabo Le Na An Jianming li deyu liu Yongbo Kuang Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences1219 Zhongguan West RoadNingbo 315201China Zhejiang Institute of Tianjin University 85 Zhongguan West RoadNingbo 315201China Research Center of New Energy Research Institute of Petroleum Exploration&Development20 Xueyuan RoadBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences19(A)Yuquan RoadBeijing 100049China

Developing stable and efficient nonprecious-metal-based oxygen evolution catalysts in the neutral electrolyte is a challenging but essential goal for various electrochemical ***,cobalt-based spinels have drawn a considerable amount of attention but most of them operate in alkali ***,the frequently studied Co-Fe spinel system never exhibits appreciable stability in nonbasic conditions,not to mention attract further investigation on its key structural motif and transition states for activity ***,we report exceptional stable Co-Fe spinel oxygen evolution catalysts(~30%Fe is optimal)in a neutral electrolyte,owing to its unique metal ion arrangements in the crystal *** introduced iron content enters both the octahedral and tetrahedral sites of the spinel as Fe^(2+)and Fe^(3+)(with Co ions having mixed distribution as well).Combining density functional theory calculations,we find that the introduction of Fe to Co_(3)O_(4)lowers the covalency of metal-oxygen bonds and can help suppress the oxidation of Co^(2+/3+)and 0^(2-).It implies that the Co-Fe spinel will have minor surface reconstruction and less lattice oxygen loss during the oxygen evolution reaction process in comparison with Co_(3)O_(4)and hence show much better *** findings suggest that there is still much chance for the spinel structures,especially using reasonable sublattices engineering via multimetal doping to develop advanced oxygen evolution catalysts.

关键词： dual-sites iron electrocatalyst stability neutral electrolyte oxygen evolution reaction spinel oxides