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Unveiling the tailorable electrochemical properties of zeolitic imidazolate framework-derived Ni-doped LiCoO_(2) for lithium-ion batteries in half/full cells

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Journal of Energy Chemistry 2024年第6期93卷 229-242,I0006页

作者： Jian-En Zhou Yiqing Liu Zhijian Peng Quanyi Ye Hua Zhong Xiaoming Lin Ronghua Zeng yongbo wu Jiaye Ye Guangdong Provincial International Joint Research Center for Energy Storage Materials Key Laboratory of Theoretical Chemistry of EnvironmentMinistry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina School of Chemistry and Physics Faculty of ScienceQueensland University of TechnologyBrisbaneQLD 4001Australia Key Laboratory of Atomic and Subatomic Structure and Quantum Control(Ministry of Education) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of MatterSchool of PhysicsSouth China Normal UniversityGuangzhou 510006GuangdongChina Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials Guangdong-Hong Kong Joint Laboratory of Quantum MatterSouth China Normal UniversityGuangzhou 510006GuangdongChina

As a prevailing cathode material of lithium-ion batteries(LIBs),LiCoO_(2)(LCO)still encounters the tricky problems of structural collapse,whose morphological engineering and cation doping are crucial for surmounting the mechanical strains and alleviating phase degradation upon ***,we propose a strategy using a zeolitic imidazolate framework(ZIF)as the self-sacrificing template to directionally prepare a series of LiNi_(0.1)Co_(0.9)O_(2)(LNCO)with tailorable electrochemical *** rational selection of sintering temperature imparts the superiority of the resultant products in lithium storage,during which the sample prepared at 700℃(LNCO-700)outperforms its counterparts in cyclability(156.8 mA h g^(-1)at 1 C for 200 cycles in half cells,1 C=275 mA g^(-1))and rate capability due to the expedited ion/electron transport and the strengthen mechanical *** feasibility of proper Ni doping is also divulged by half/full cell tests and theoretical study,during which LNCO-700(167 mA h g^(-1)at 1 C for 100 cycles in full cells)surpasses LCO-700 in battery performance due to the mitigated phase deterioration,stabilized layered structu re,ameliorated electro nic co nductivity,a nd exalted lithium sto rage *** work systematically unveils tailorable electrochemical behaviors of LNCO to better direct their practical application.

关键词： Lithium-ion batteries Zeolitic imidazolate framework LiNi_(0.1)Co_(0.9)O_(2) Electrochemical properties

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钛合金超声辅助等离子体氧化改性磨削基本加工特性研究

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机械工程学报 2024年第9期60卷 13-25页

作者：武韩强陈卓叶曦珉张诗博李偲偲曾江汪强吴勇波南方科技大学机械与能源工程系深圳518055 温州大学机电工程学院温州325600

鉴于钛合金的难加工特性,提出了超声辅助等离子体氧化改性磨削新方法。首先介绍了新方法的加工原理,并基于加工原理构建了实验装置;其次就不同电解质溶液对等离子体氧化层生长方向,工艺参数对等离子体氧化层厚度的影响规律开展研究;随... 详细信息

鉴于钛合金的难加工特性,提出了超声辅助等离子体氧化改性磨削新方法。首先介绍了新方法的加工原理,并基于加工原理构建了实验装置;其次就不同电解质溶液对等离子体氧化层生长方向,工艺参数对等离子体氧化层厚度的影响规律开展研究;随后表征等离子体氧化层表面主要化学成分、显微硬度,并利用单点磨削实验揭示等离子体氧化层的材料去除行为;最后对比有、无氧化层的磨削加工特性。研究表明:Na_(2)SO_(4)溶液下的氧化层主要向内生长;在工艺参数中,降低进给速度和增加超声振幅可以提升氧化层厚度;氧化层较低的硬度和疏松多裂纹结构提高了钛合金的切削加工性。相比于无氧化层的传统磨削,超声辅助等离子体氧化改性生成的氧化层可以降低磨削力,提升表面质量,减少砂轮磨粒脱落和磨屑粘附。

关键词：钛合金超声等离子体氧化氧化层性能磨削性能

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3种水生植物对尾水的净化效果及生理特征变化

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南京林业大学学报(自然科学版) 2024年第5期48卷 221-227页

作者：夏桐桐吴永波蒲可逸王明丽南京林业大学生态与环境学院南方现代林业协同创新中心

【目的】探究水生植物对污水处理厂尾水的净化效果及生理特征变化，为尾水深度净化及植物选择提供参考依据。【方法】以水葱(Schoenoplectus tabernaemontani)、香蒲(Typha orientalis)、黄菖蒲(Iris pseudacorus)为研究对象，在室外试... 详细信息

【目的】探究水生植物对污水处理厂尾水的净化效果及生理特征变化，为尾水深度净化及植物选择提供参考依据。【方法】以水葱(Schoenoplectus tabernaemontani)、香蒲(Typha orientalis)、黄菖蒲(Iris pseudacorus)为研究对象，在室外试验模拟配制2种不同浓度的污水厂尾水，分析这3种植物对不同浓度尾水中化学需氧量(COD)、总氮(TN)、总磷(TP)的去除效果以及植物的生理特征变化。【结果】3种植物对尾水中COD、TN和TP均有良好的去除效果，尾水中COD质量浓度由61.42～107.28 mg/L下降至8.63～16.20 mg/L,TN由24.49～31.54 mg/L下降至0.40～7.90 mg/L,TP由2.11～3.43 mg/L下降至0.05～1.00 mg/L。水葱和黄菖蒲在尾水中抗氧化酶活性和相对电导率增大，香蒲过氧化物酶(POD)活性和相对电导率显著下降(P<0.05),过氧化氢酶(CAT)活性显著上升(P<0.05)。3种植物在尾水中的叶绿素含量均显著下降(P<0.05),水葱在高浓度COD、TN和TP尾水中光合作用减弱。【结论】水葱、香蒲和黄菖蒲对污水厂尾水中COD、TN和TP去除效果显著，植物在尾水中生理代谢受到影响。综合各参数，可将水葱和香蒲搭配种植用于低浓度COD、TN和TP尾水的净化，黄菖蒲用于高浓度尾水的净化。

关键词：水生植物尾水净化生理特征水葱香蒲黄菖蒲

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某水电站“以阀代井”方案研究

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水电站设计 2024年第3期40卷 72-76页

作者：吴永波徐县中国电建集团成都勘测设计研究院有限公司四川成都610072

调压井是水电站工程中最常用的调压设施,但在某些工程中受地形地质条件限制,施工较为困难或工程造价高,常需研究设置调压阀作为电站的调节保证措施。以贵州某电站工程为例,为促进电站尽快产生发电效益,研究分析了仅在3号机组支管旁布置... 详细信息

调压井是水电站工程中最常用的调压设施,但在某些工程中受地形地质条件限制,施工较为困难或工程造价高,常需研究设置调压阀作为电站的调节保证措施。以贵州某电站工程为例,为促进电站尽快产生发电效益,研究分析了仅在3号机组支管旁布置1台调压阀来解决电站调保问题的技术可行性。

关键词：水电站调压阀调压井过渡过程计算

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A SIMULTANEOUS MULTI-PROBE DETECTION LABEL-FREE OPTICAL-RESOLUTION PHOTOACOUSTIC MICROSCOPY TECHNIQUE BASED ON MICROCAVITY TRANSDUCER

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Journal of Innovative Optical Health Sciences 2013年第3期6卷 108-113页

作者： yongbo wu ZHILIE TANG YAN CHI LIRU wu School of Physics and Telecom Engineering South China Normal University Guangzhou 510006P.R.China Laboratory of Quantum Information Technology South China Normal University IMOTGuangzhou 510006P.R.China

We demonstrate the feasibility of simultancous multi-probe detection for an optcal-resolution photoacoustic microscopy(OR-PAM)***-P AM has elicited the attention of biomedical imaging researchers because of its optical absorption contrast and high spatial resolution with great imaging ***-PAM allows label-free and noninvasive imaging by maximizing the optical absorption of endogenous ***,given the inadequate absoption of some biomolcules,detection sensitivity at the same incident intensity requires *** this study,a modulated continuous wave with power density less than 3mW/cm^(2)(1/4 of the ANSI safety limit)excited the weak photoacoustic(PA)signals of biological cells.A microcavity traneducer is developed based on the bulk modulus of gas five orders of magnitude lower than that of solid;air pressure variation is inversely proportional to cavity volume at the same temperature *** that a PA wave expands in various directions,detecting PA signals from different positions and adding them together can increase detection sensitivity and signal-to-noise ***,we employ four detectors to acquire tiny PA signals *** results show that the developed OR-PAM system allows the label-free imaging of cells with weak optical absorption.

关键词： Multi-probe label free optical-resolution photoacoustic microscopy

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Processing of high-precision ceramic balls with a spiral V-groove plate

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Frontiers of Mechanical Engineering 2017年第1期12卷 132-142页

作者： Ming FENG yongbo wu Julong YUAN Zhao PING Department of Machine InteUigence & Systems Engineering AkitaPrefectural University Akita 015-0055 Japan Ultra-Precision Machining Center Zhejiang University of TechnologyHangzhou 310014 China

As the demand for high-performance bearings gradually increases, ceramic balls with excellent proper- ties, such as high accuracy, high reliability, and high chemical durability used, are extensively used for high- performance bearings. In this study, a spiral V-groove plate method is employed in processing high-precision ceramic balls. After the kinematic analysis of the ball-spin angle and enveloped lapping trajectories, an experimental rig is constructed and experiments are conducted to confirm the feasibility of this method. Kinematic analysis results indicate that the method not only allows for the control of the ball-spin angle but also uniformly distributes the enveloped lapping trajectories over the entire ball surface. Experimental results demonstrate that the novel spiral V- groove plate method performs better than the conventional concentric V-groove plate method in terms of roundness, surface roughness, diameter difference, and diameter decrease rate. Ceramic balls with a G3-1evel accuracy are achieved, and their typical roundness, minimum surface roughness, and diameter difference are 0.05, 0.0045, and 0.105 μm, respectively. These findings confirm that the proposed method can be applied to high-accuracy and high-consistency ceramic ball processing.

关键词： bearing ceramic ball spiral V-groove,kinematic analysis trajectory

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不同耦合介质下岩石损伤特性数值模拟

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有色金属工程 2024年第7期14卷 121-129页

作者：李昊明李祥龙王建国胡启文武永博昆明理工大学公共安全与应急管理学院昆明650093 昆明理工大学国土资源工程学院昆明650093 云南省教育厅爆破新技术工程研究中心昆明650093

为探究空气和水不耦合爆破的岩石损伤特性,利用数值模拟分析了五组不耦合系数模型爆破后的岩石损伤演化过程、破裂范围以及孔壁峰值压力,最后开展现场试验验证数值模拟结果。结果表明:随着径向不耦合系数增大,空气不耦合爆破的岩石损伤... 详细信息

为探究空气和水不耦合爆破的岩石损伤特性,利用数值模拟分析了五组不耦合系数模型爆破后的岩石损伤演化过程、破裂范围以及孔壁峰值压力,最后开展现场试验验证数值模拟结果。结果表明:随着径向不耦合系数增大,空气不耦合爆破的岩石损伤区域范围衰减更加明显;水不耦合爆破产生的初始冲击波能量更大,传播过程中的能量利用率更高,且由于水介质的几乎不可压缩性,能量能够较平缓而均匀地作用在炮孔壁上;相同不耦合系数条件下,水不耦合爆破后的孔壁峰值压力更大,但水介质能够对孔壁产生较好的保护作用,进行隧道光面爆破试验后效果更好。以上研究可为隧道光面爆破装药结构选择提供一定的参考依据。

关键词：不同耦合介质不耦合系数孔壁峰值压力裂纹扩展岩石损伤

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A versatile strategy to activate self-sacrificial templated Li_(2)MnO_(3) by defect engineering toward advanced lithium storage

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Journal of Energy Chemistry 2023年第10期85卷 164-180,I0007页

作者： Jian-En Zhou Yanhua Peng Xiaoyan Sang Chunlei wu Yiqing Liu Zhijian Peng Hong Ou yongbo wu Xiaoming Lin Yuepeng Cai Guangzhou Key Laboratory of Materials for Energy Conversion and Storage Joint Laboratory of Energy and Materials Chemistry(South China Normal University-Guangzhou Tianci New Materials Co.Ltd.)Key Laboratory of Theoretical Chemistry of EnvironmentMinistry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina National Engineering Research Center for Carbohydrate Synthesis Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of EducationJiangxi Normal UniversityNanchang 330022JiangxiChina Guangzhou Huifu Research Institute Co. LtdNanxiang San LuGuangzhou 510663GuangdongChina Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials National Demonstration Center for Experimental Physics EducationSchool of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006GuangdongChina

Despite the dazzling theoretical capacity,the devasting electrochemical activity of Li_(2)MnO_(3)(LMO)caused by the difficult oxidation of Mn4+impedes its practical application as the lithium-ion battery(LIB)*** efficacious activation of the Li_(2)MnO_(3) by importing electrochemically active Mn3+ions or morphological engineering is instrumental to its lithium storage activity and structural integrity upon ***,we propose a conceptual strategy with metal-organic frameworks(MOFs)as self-sacrificial templates to prepare oxygen-deficient Li_(2)MnO_(3)(O_v-LMO)for exalted lithium storage *** to optimized morphological features,LMO materials derived from Mn-BDC(H_(2)BDC=1,4-dicarboxybenzene)delivered superior cycling/rate performances compared with their counterparts derived from Mn-BTC(H_(3)BTC=1,3,5-benzenetricarboxylicacid)and Mn-PTC(H_(4)PTC=pyromellitic acid).Both experimental and theoretical studies elucidate the efficacious activation of primitive LMO materials toward advanced lithium storage by importing oxygen ***,O_v-LMO derived from Mn-BDC(O_v-BDC-LMO)delivered intriguing reversible capacities(179.2 mA h g^(-1)at 20 mA g^(-1)after 200 cycles and 100.1 mA h g^(-1)at 80 mA g^(-1)after 300 cycles),which can be attributed to the small particle size that shortens pathways for Li+/electron transport,the enhanced redox activity induced by abundant oxygen vacancies,and the optimized electronic configuration that contributes to the faster lithium *** work provides insights into the rational design of LMO by morphological and atomic modulation to direct its activation and practical application as an advanced LIB cathode.

关键词： Li_(2)MnO_(3) Metal-organic framework Oxygen vacancy Lithium-ion battery Electrochemical activity

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UAV-based spatial pattern of three-dimensional green volume and its influencing factors in Lingang New City in Shanghai,China

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Frontiers of Earth Science 2021年第3期15卷 543-552页

作者： Sijun ZHENG Chen MENG Jianhui XUE yongbo wu Jing LIANG Liang XIN Lang ZHANG College of Biology and the Environment Nanjing Forestry UniversityNanjing 210037China Shanghai Academy of Landscape Architecture Science and Planning Shanghai 200241China School of Ecological and Environmental Sciences East China Normal UniversityShanghai 200241China Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration Shanghai 200241China Shanghai Institute of Surveying and Mapping Shanghai 200063China

Three-dimensional green volume(TDGV)reflects the quality and quantity of urban green space and its provision of ecosystem services;therefore,its spatial pattern and the underlying influential factors play important roles in urban planning and ***,little is known about the factors contributing to the spatial pattern of *** this paper,TDGV and land use intensity(LUI)extracted from high spatial resolution(0.05 m)remotely sensed data acquired by an unmanned aerial vehicle(UAV),anthropogenic factors^(1))and natural factors^(2))were utilized to identify the spatial pattern of TDGV and the potential influencing factors in Lingang New City,a rapidly developed coastal town in *** results showed that most of the TDGV was distributed in the western part of this new city and that its spatial variations were significantly *** corresponded well with the chronologies of land formation,urban planning,and construction in the *** least squares(GLS)analysis of TDGV(grid cell size:100×100 m)and its influencing factors showed that the TDGV in this new city was significantly negatively correlated with both LUI and distance from roads and significantly positively correlated with land formation time and distance from *** from buildings did not affect ***,the degree of influence decreased in the following order:distance from water>land formation time>distance from roads>*** results indicate that the spatial pattern of TDGV in this new town was mainly affected by natural factors(i.e.,the distance from water and land formation time)and that the artificial disturbances caused by rapid urbanization did not decrease the regional *** main factors shaping the spatial distribution of TDGV in this city were local natural *** findings suggest that the improvement in local soil and water conditions should be emphasized in the construction of new cities in coastal areas to ensure the efficient provision of ecolo

关键词： low-altitude remote sensing LUI urban space layout land formation time dominant factor

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In vivo monitoring of microneedle-based transdermal drug delivery of insulin

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Journal of Innovative Optical Health Sciences 2018年第5期11卷 84-95页

作者： Jiawei Zhao yongbo wu Junbo Chen Bangrong Lu Honglian Xiong Zhilie Tang Yanhong Ji School of Physics and Telecom Engineering South China Normal University No.378 West Waihuan Street Guangzhou 510006P.R.China MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science College of Biophotonics South China Normal University No.55 Zhongshan Xi RoadGuangzhou 510631P.R.China

Soluble microneedles(MNs)have recently become an eficient and minimally invasive tool in transdermal drug delivery because of their excellent biocompatibility and rapid ***,direct monitoring of structural and functional changes of MNs in vivo to estimate the efficieancy of insulin delivery is *** monitored the dissolution of MNs to obtain structural imaging of MNs'changes by using optical coherence tomography(OCT).We also observed the effect of MNs on microvascular conditions with laser speckle contrast imaging(LSCIT)and measured the blood perfusion of skin to obtain functional imaging of *** determined the performance of two soluble MN arrays made from polyvinyi alcohol(PVA)and polyvinyl alco-hol/polyvinylpyrolidone(PVA/PVP)by calculating the cross sectional areas of the micro-channels in mouse skin as a function of ***,the change in blood glucose before and after using MNs loaded with insulin was evaluated as an auxiliary means to demonstrate the ability of the soluble MNs to deliver *** showed that the structural imaging of these MNs could be observed in vivo via OCT in real time and the fumctional imaging of MNs could be showed using LSCI OCT and LSCI are potential tools in monitoring MNs structural and functional changes.

关键词： Soluble microneedle insulin optical coherence tomography laser speckle contrast imaging

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