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钠/钾离子电池用锑基负极研究进展:失效分析及解决方案

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应用化学 2024年第5期41卷 616-636页

作者：张冬玉王春丽程勇王立民中国科学院长春应用化学研究所稀土资源利用国家重点实验室长春130022 中国科学技术大学应用化学与工程学院合肥230026

钠/钾离子电池因其丰富的资源储量被认为是后锂离子电池时代大规模储能应用中最有希望的选择。在众多的钠/钾离子电池负极材料中,锑(Antimony,Sb)基负极由于其高理论比容量受到关注。然而,Sb基材料在储能过程中存在的棘手问题阻碍了它... 详细信息

钠/钾离子电池因其丰富的资源储量被认为是后锂离子电池时代大规模储能应用中最有希望的选择。在众多的钠/钾离子电池负极材料中,锑(Antimony,Sb)基负极由于其高理论比容量受到关注。然而,Sb基材料在储能过程中存在的棘手问题阻碍了它的实际应用,比如:巨大的体积膨胀导致材料粉化脱离集流体,电池失效;欠佳的导电性,电化学动力缓慢;电极-电解液界面副反应,电池性能差等。为解决这些问题,研究者们从结构设计、掺杂催化改性和电解液界面调控等方面进行了探究,期望将Sb基材料高容量的优势发挥出来。因此,本文总结了近10年“钠/钾离子电池用Sb基负极”研究方面的亮点工作,详细讨论Sb基材料的失效机理,并系统地综述了相应的解决方案,为高性能Sb基及其他合金类负极材料的优化策略提供参考。

关键词：钠/钾离子电池 Sb基负极失效分析电化学性能优化

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低强度再生混凝土微观形态与力学性能的相关性研究

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水电能源科学 2024年第4期42卷 111-114页

作者：张玉栋张富钧谢龙高玉增王一晓王少雷河北建筑工程学院河北省土木工程诊断、改造与抗灾重点试验室河北张家口075000 中原科技学院土木建筑学院河南郑州450000

建筑垃圾来源复杂,为提高再生混凝土的资源利用,并满足基本工程应用要求,在仅考虑再生骨料密度、吸水和含水率、压碎指标的条件下,采用再生粗骨料混凝土配合比设计法配置低强度再生混凝土,结合切片法和SEM扫描电镜对再生混凝土的孔隙结... 详细信息

建筑垃圾来源复杂,为提高再生混凝土的资源利用,并满足基本工程应用要求,在仅考虑再生骨料密度、吸水和含水率、压碎指标的条件下,采用再生粗骨料混凝土配合比设计法配置低强度再生混凝土,结合切片法和SEM扫描电镜对再生混凝土的孔隙结构变化与微观形貌进行观察,分析水胶比、减水剂、粉煤灰对低强度再生混凝土内部结构的影响,发现当水胶比降低时,再生混凝土内部结构的密实度提升,絮状C-S-H之间更为密实,多害孔的比例降低,抗压和劈裂强度提高;当减水剂掺量提升时,钙钒石(AFt)的含量增加,内部结构更为致密;粉煤灰对再生混凝土的抗压和劈裂强度呈负面影响,降低C-S-H与再生骨料之间的粘结性,内部孔隙率变大,坍落度升高,可降低经济成本。

关键词：低强度再生粗骨料配合比设计切片法 SEM 孔隙率

基于移动终端的养老护理员工健康数据实时监测系统

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自动化技术与应用 2024年第5期43卷 118-122,144页

作者：王丽娟张俞东西安医学院护理与康复学院陕西西安710021 西安思宇信息技术公司陕西西安710013

传统养老护理员工健康数据监测系统,受到硬件与软件算法局限性影响,存在监测数据实时性差,误差较大问题。为此,提出基于移动终端的养老护理员工健康数据实时监测系统。根据养老护理员工工作性质,设计系统硬件采用移动终端设计,利用4G无... 详细信息

传统养老护理员工健康数据监测系统,受到硬件与软件算法局限性影响,存在监测数据实时性差,误差较大问题。为此,提出基于移动终端的养老护理员工健康数据实时监测系统。根据养老护理员工工作性质,设计系统硬件采用移动终端设计,利用4G无线传输技术器件,引入健康数据采集传感器,搭建监测系统移动采集终端;通过对不同健康参量的采集、特征提取与整合输出,实现优化健康数据特征量,提升数据判断精度的效果。实验结果表明,提出的设计系统的健康监测效果更好,更适合护理人员监控监测的应用。

关键词：移动终端护理人员健康数据实时监测

Protective effect of cyclophilin A against Alzheimer＇s amyloid beta-peptide （25-35）-induced oxidative stress in PC12 cells

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Chinese Medical Journal 2009年第6期122卷 716-724页

作者： GE yu-song TENG Wei-yu zhang Chao-dong Department of Neurology First Affiliated Hospital China Medical University Shenyang Liaoning 110001 China

Background β-amyloid peptide （Aβ） is considered responsible for the pathogenesis of Alzheimer＇s disease （AD）. Possible mechanisms underlying Aβ-induced neuronal cytotoxicity include excessive production of reactive oxidative species （ROS） and apoptosis. Cyclophilin A （CypA）, exhibits antioxidant properties and protects neurons against oxidative stress induced injury. This study was conducted to demonstrate whether CyPA added to cultured PC12 cells could alleviate Aβ-induced oxidative stress and protect them from apoptosis.Methods PC12 cells were pre-incubated for 30 minutes with recombinant human cyclophilin A （rhCyPA） in 0.1 nmol/L, 1.0 nmol/L, 10 nmol/L and 100 nmol/L and then incubated with 10 μmol/L Aβ25-35. In every group, cell viability, apoptotic morphology, apoptotic rate, intracellular ROS accumulation, the activities of superoxide dismutase （SOD） and glutathione peroxidase （GSH-Px） of PC12 cells and mitochondrial transmembrane potential were detected. Subsequently, the expression of the active form of caspase-3 was determined by Western blotting.Results It was shown that cultures treated with 1.0 nmol/L, 1U nmol/L or 100 nmol/L rnL, rhCyPA＋Aβ25-35 had significantly higher cell viability and a lower rate of apoptosis compared with the cultures exposed only to Aβ25-35. In addition, rhCyPA attenuated Aβ25-35-induced overproduction of intracellular ROS and Aβ25.35-induced a decrease in activity of the key antioxidant enzymes SOD and GSH-Px. Furthermore, rhCyPA also attenuated Aβ25.35-induced mitochondrial dysfunction and the activation of caspase-3.Conclusion CyPA may act as an ROS scavenger, and prevent Aβ25-35-induced neurotoxicity through attenuating oxidative stress induced by Aβ25-35.

关键词： Alzheimer's disease cyclophilin A β-amyloid oxidative stress apoptosis

镁掺杂高镍三元正极材料LiNi_(0.9)0Co_(0.05)Mn_(0.05)O_(2)的合成与性能

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应用化学 2024年第4期41卷 568-576页

作者：陈胜胡祖飞曹洪美赵振华张宇栋江苏科技大学材料科学与工程学院镇江212100 湖南久日新材料有限公司怀化418200 江苏科技大学能源与动力学院镇江212100

采用高温固相法合成了一系列不同含量Mg掺杂的LiNi_(0.9)0Co_(0.05)Mn_(0.05)O_(2)正极材料,并通过X射线衍射、扫描电子显微镜、透射电子显微镜和X射线光电子能谱等表征手段对其物相结构、颗粒形貌及电化学性能进行了研究。结果表明,掺... 详细信息

采用高温固相法合成了一系列不同含量Mg掺杂的LiNi_(0.9)0Co_(0.05)Mn_(0.05)O_(2)正极材料,并通过X射线衍射、扫描电子显微镜、透射电子显微镜和X射线光电子能谱等表征手段对其物相结构、颗粒形貌及电化学性能进行了研究。结果表明,掺杂Mg元素虽然会降低材料的可逆容量,但是可扩大材料晶胞体积,抑制不可逆相变,改善电极与电解液的界面稳定性,可有效提升材料的循环稳定性。其中,3%摩尔分数掺杂量的LiNi_(0.9)0Co_(0.05)Mn_(0.05)O_(2)正极材料结构稳定,容量损失较少,综合性能表现较好,在0.1 C、2.8~4.3 V电压范围内,首周充放电比容量达到了197.3 mA∙h/g,100周的循环保持率达到了93.6%,且5 C下放电比容量为161.1 mA∙h/g。

关键词：锂离子电池正极材料元素掺杂电化学性能

基于智能合约和CPSO_DNN的流程工艺参数可信自决策模型

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控制与决策 2024年第6期39卷 1869-1878页

作者：刘孝保袁智慧张雨东孙海彬阴艳超姚廷强顾文娟昆明理工大学机电工程学院昆明650500

针对流程制造过程中工艺关系复杂、优化效率难保证和数据安全问题,提出一种基于智能合约和改进混沌粒子群算法的工艺参数可信自决策模型PPO-TS.首先,基于区块链技术设计适合流程制造工艺特性的数据集成与存储机制,通过数据上链技术实现... 详细信息

针对流程制造过程中工艺关系复杂、优化效率难保证和数据安全问题,提出一种基于智能合约和改进混沌粒子群算法的工艺参数可信自决策模型PPO-TS.首先,基于区块链技术设计适合流程制造工艺特性的数据集成与存储机制,通过数据上链技术实现数据的可信存储;然后,设计工艺参数自决策智能合约机制,利用智能合约搭建基于区块链广播式通信协议的工艺参数优化网络,启动网络并编译质量指标访问、优化自决策和决策自执行智能合约,通过自动触发工艺参数优化事务完成自决策和自执行过程;在此基础上构建基于改进混沌粒子群算法CPSO和深度神经网络DNN的优化算法CPSO_DNN,实现流程制造工艺参数优化;最后,以现场采集的某流程生产线数据为例,验证了PPO-TS模型的实用性和有效性,为流程制造工艺参数优化提供了一种新思路.

关键词：流程制造区块链智能合约数据可信存储工艺参数自决策工艺参数优化

In-Situ Annealing Study of Transformation of α and γ Texture of Interstitial-Free Steel Sheet by High-Energy X-Ray Diffraction

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Journal of Iron and Steel Research International 2013年第5期20卷 38-41页

作者： LIU Yan-dong zhang yu-dong REN Yang Albert Tidu ZUO Liang Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education Northeastern University LETAM/ISGMP CNRS X-Ray Science Division Argonne National Laboratory

High-energy synchrotron diffraction offers great potential for experimental study of recrystallization kinetics. An experimental design to study the recrystallization mechanism of interstitial-free （IF） steel was implemented. The whole annealing process of cold-rolled IF steel with 80% reduction was observed in situ using high-energy X-ray diffraction （HEXRD）. The results show how the main texture component of IF steel change, i.e. the α [∥rolling direction （RD）] fiber texture decreases and the γ [∥normal direction （ND）] fiber texture increases. The important part of the α fiber texture is that both the {100} and {112} texture decrease at the beginning of recrystallization. The γ fiber texture increases at the early stage of recrystallization which stems from the increase of {111}. Nevertheless, the {111} does not change after recrystallization. The dynamic evolution of the main texture components {100}, {112}, {111} and {111} is given by in-situ HEXRD.

关键词： IF steel texture recrystallization high-energy X-ray diffraction Debye-Scherrer ring

LCF behavior and life prediction method of a single crystal nickel-based superalloy at high temperature

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Frontiers of Mechanical Engineering 2015年第4期10卷 418-423页

作者： Zhihua zhang Huichen yu Chengli dong Beijing Key Laboratory of Aeronautical Materials Testing andEvaluation Science and Technology on Advanced High TemperatureStructural Materials Laboratory Beijing Institute of AeronauticalMaterials Beijing 100095 China

Low cycle fatigue tests were conducted on the single crystal nickel-based superalloy, DD6, with different crystallographic orientations （i.e., [001], [011], and [111]） and strain dwell types （i.e, tensile, compressive, and balanced types） at a certain high temperature. Given the material anisotropy and mean stress, both orientation factor and stress range were introduced to the Smith, Watson, and Topper （SWT） stress model to predict the fatigue life. Experimental results indicated that the fatigue properties of DD6 depend on both crystallographic orientation and loading types. The fatigue life of the tensile, compressive, and balanced strain dwell tests are shorter than those of continuous cycling tests without strain dwell because of the important creep effect. The predicted results of the proposed modified SWT stress method agree well with the experimental data.

关键词： single crystal superalloy low cycle fatigue(LCF) crystallographic orientation strain dwell lifeprediction

Analysis and experimental study on resistance-increasing behavior of composite high efficiency autonomous inflow control device

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Petroleum Science 2024年第2期21卷 1290-1304页

作者： Liang-Liang dong yu-Lin zhang School of Mechatronic Engineering Southwest Petroleum UniversityChengdu610500SichuanChina State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500SichuanChina Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan ProvinceChengdu610500SichuanChina

Bottom water coning is the main reason to reduce the recovery of horizontal bottom water reservoir. By water coning, we mean the oil-water interface changes from a horizontal state to a mound-shaped cone and breaks through to the wellbore. Autonomous inflow control device(AICD) is an important instrument maintain normal production after bottom water coning, however, the resistance increasing ability of the swirl type AICD is insufficient at present, which seriously affects the water control effect. Aiming this problem, this paper designs a multi-stage resistance-increasing and composite type AICD. The separation mechanism of oil-water two phases in this structure, the resistance form of oil-water single phase and the resistance-increasing principle of water phase are analyzed. Establishing the dual-phase multi-stage separation and resistance-increasing model, and verified by measuring the throttling pressure drop and oil-water volume fraction of the AICD, it is found that the composite type AICD has the effect of ICD and AICD at the same time, which can balance the production rate of each well section at the initial stage of production, delay the occurrence of bottom water coning. In the middle and later stages of production, water-blocking can be effectively increased to achieve water control and stable *** structural sensitivity analysis, the influence law of various structural parameters on the water control performance of composite AICD was obtained. The simulation calculation results show that,compared with the existing swirl type AICD, composite AICD has higher sensitivity to moisture content,the water phase throttling pressure drop is increased by 4.5 times on average. The composite AICD is suitable for the entire stage of horizontal well production.

关键词： Water control Flow separation Flow resistance-increasing AICD device Simulation and experiment