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Advancing knowledge of plasma spraying coatings for li||sb-Sn liquid metal batteries by X-ray micro-CT

Chinese Chemical Letters 2023年第7期34卷 308-312页

作者： Kaixuan Cui Ping li Wang Zhao Chunrong liu Qi Wan Shengwei li Xuanhui Qu Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBejing 100084China Institute of Science and Technology China Three Gorges CorporationBeijing 100038China School of Materials Science and Engineering Southwest University of Science and TechnologyMianyang 621010China Shanxi Beike Qiantong Energy Storage Science and Technology Research Institute Co. Ltd.Gaoping 048400China

The performance of li||sb-Sn liquid metal batteries(LMBs) is hindered by the corrosion of the sb-Sn cathode on its current collector. Herein, a uniform, dense, and low-oxidized W coating was prepared by plasma spraying, which can effectively resist the corrosion of the cathode and improve the cycle stability of the li||sb-Sn LMBs. For the first time, micro-CT nondestructive inspection is applied in the field of LMBs. The corrosion micromorphology and composition evolution of the SS304 matrix and sb-Sn cathode with or without the plasma-sprayed W coating is obtained without disassembling the battery, which proves that the W coating can effectively protect the SS304 matrix. Our autonomous new LMB device for nondestructive inspection is universal and can be applied to different LMBs systems for advancing knowledge of corrosion mechanism and protection. This work guarantees the ability to directly visualize the inner critical positions in three dimensions and fills the knowledge gap in the field of LMB detection technology.

关键词： liquid metal batteries sb-Sn corrosion Plasma-sprayed W coating SS304 matrix Micro-CT nondestructive inspection

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A Convenient and Stereospecific Synthesis of (Z)-Benzylidenephthalides

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Chinese Chemical Letters 2001年第11期12卷 955-956页

作者： Wang, ZW li, sb Lanzhou Univ Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China

A convencient and stereospecific synthesis of (Z)-benzylidenephthalides, including thunberginol F, from phthalides is described.

关键词： benzylidenephthalides phthalides synthesis

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A Facile Synthetic Approach to Two Chalcones

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Chinese Chemical Letters 2001年第11期12卷 957-958页

作者： Du, ZT li, sb Lanzhou Univ Inst Organ Chem Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China

A facile synthetic route for two chalcone analogues was developed. The key step was selective deprotection of MOM in aryl methyl ether 6 by silica gel.

关键词： chalcone synthesis

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Bandgap narrowing and polarization enhancement in(K,Na,li)(Nb,sb,Ta)O_(3)+x%Fe_(2)O_(3) lead-free ceramics for photovoltaic applications

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Journal of Advanced Ceramics 2023年第7期12卷 1406-1417页

作者： Jian Chen Jiaxing Mao Zihui Wang Yanhui Dong Jinming Guo Mingkai li Yi Zhang Yinmei Lu Yunbin He Key Laboratory of Green Preparation and Application for Functional Materials Ministry of EducationHubei Key Lab of Ferro&Piezoelectric Materials and DevicesHubei Key Laboratory of Polymer MaterialsSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China Institute of Photoelectronic Thin Film Devices and Technology Tianjin Key Laboratory of Thin Film Devices and TechnologyNankai UniversityTianjin 300350China

The need for ferroelectric materials with both narrow bandgaps(Eg)and large remanent polarization(Pr)remains a key challenge to the development of high-efficiency ferroelectric photovoltaic(FPV)*** this work,[(K_(0.43)Na_(0.57))_(0.94)li_(0.06)][(Nb_(0.94)sb_(0.06))_(0.95)Ta_(0.05)]O_(3)(KNLNST)-based lead-free ceramics with narrow Eg and large P are obtained via Fe_(2)O_(3) *** optimizing the level of Fe_(2)O_(3) doping,a KNLNST+1.3%Fe_(2)O_(3) ceramic is fabricated that simultaneously possesses a narrow Eg of 1.74 eV and a large Pr of 27.05μC/cm^(2).These values are much superior to those of undoped KNLNST ceramics(Eg=3.1 eV and Pr=17.73μC/cm^(2)).While the large P stems from the increment of the volume ratio between the orthorhombic and tetragonal phases(Vo/VT)in KNLNST ceramics by proper amount of Fe3+doping,the narrow Eg is attributed to the coupling interaction between the Fe3+dopants and the B-site sb3+host ***,a switchable photovoltaic effect caused by the ferroelectric depolarization electric field(Edp)is observed in the KNLNST+1.3%Fe_(2)O_(3) ceramic-based *** to the narrower Eg and larger P,of the doped ceramic,the photovoltaic performance of the corresponding device(open-circuit voltage(Voc)=-5.28 V and short-circuit current density(JSC)=0.051μA/cm^(2))under a downward poling state is significantly superior to that of an undoped KNLNST-based device(Voc=-0.46 V and Jse=0.039μA/cm^(2)).This work offers a feasible approach to developing ferroelectric materials with narrow bandgaps and large Pr for photovoltaic applications.

关键词： ferroelectrics bandgap(E_(g)) remanent polarization(P_(r)) photovoltaic effect [(K_(0.43)Na_(0.57))_(0.94)li_(0.06)][(Nb_(0.94)sb_(0.06))_(0.95)Ta_(0.05)]O_(3)(KNLNST)

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Phase Structures of （K0.48Na0.52）0.945li0.055sb0.05Nb0.95O3 Piezoceramics

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Chinese Physics Letters 2010年第1期27卷 242-244页

作者：臧国忠仪修杰徐志军付鹏赵利民蒲锡鹏 School of Materials Science and Engineering Liaocheng University Liaocheng 252059

The phase structures of lead-free （K0.48Na0.52）0.945li0.055sb0.05Nb0.95O3 piezoceramics are studied based on the measurements of ferroelectric and dielectric properties as well as the analyses of x-ray diffraction pattern and energy dispersive spectroscopy. The poled samples exhibit orthorhombic structure whereas the surface and interior for unpoled samples exhibit tetragonal and tetragonal-orthorhombic coexistent structures, respectively. These results are in agreement with the relative permittivity-temperature curves and demonstrate that phase transitions can be induced by Na volatilization and poling process. The remnant polarization Pr measured at 20°C increases continuously with the increase of electric field in the range of 2000-4000V/mm. This indicates that the polymorphic structure is more beneficial to the rotation or reorientation of dipoles than either the orthorhombic or the tetragonal structure. The randomly oriented domains may be the essential reason for the continuous rotation or reorientation and not good thermal stability.

关键词： Measurement Sodium Sampling Exhibitions Poles Dispersants

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li^+ extraction/adsorption properties of li-sb-Mn composite oxides in aqueous medium

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Transactions of Nonferrous Metals Society of China 2011年第7期21卷 1660-1664页

作者：马立文陈白珍石西昌张坤中南大学冶金科学与工程学院长沙410083

Series li-sb-Mn composite oxides with different sb/Mn molar ratios were obtained by solid state *** structure,morphology and li^＋ extraction/adsorption properties were characterized by X-ray diffractometry （XRD）,scanning electron microscopy （SEM） and atomic absorption spectrophotometry （AAS）,*** and SEM analyses reveal that the crystal of the products transfers from spinel to orthorhombic phase with the increase of molar ratio of sb to Mn from 0.05 to *** li^＋ extraction and adsorption experiments for these li-sb-Mn composite oxides demonstrate that the composite oxides can all be used as lithium inorganic *** acid treated spinel li-sb-Mn composite oxide with sb/Mn molar ratio of 0.05 has a high li^＋ adsorption capacity of 33.23mg/g in lithium *** sb/Mn molar ratio of these li-sb-Mn composite oxides should be a crucial factor in determining their structure and li^＋ extraction and adsorption properties.

关键词： li-sb-Mn composite oxides lithium extraction adsorption

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Interpretable Machine Learning Method for Compressive Strength Prediction and Analysis of Pure Fly Ash-based Geopolymer Concrete

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 65-78页

作者： SHI Yuqiong li Jingyi ZHANG Yang li li Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education Northwest A&F Uni-versityYangling 712100China College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100China Chongqing Key Laboratory of Public Big Data Security Technology Chongqing 401420China Chongqing College of Mobile Communication Chongqing 401520China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina National Rail Transit Electrification and Automation Engineering Technology Research Center(Hong Kong Branch) The Hong Kong Polytechnic UniversityKowloonHung HomHong KongChina

In order to study the characteristics of pure fly ash-based geopolymer concrete(PFGC)conveniently,we used a machine learning method that can quantify the perception of characteristics to predict its compressive *** this study,505 groups of data were collected,and a new database of compressive strength of PFGC was *** order to establish an accurate prediction model of compressive strength,five different types of machine learning networks were used for comparative *** five machine learning models all showed good compressive strength prediction performance on *** them,R2,MSE,RMSE and MAE of decision tree model(DT)are 0.99,1.58,1.25,and 0.25,*** R2,MSE,RMSE and MAE of random forest model(RF)are 0.97,5.17,2.27 and 1.38,*** two models have high prediction accuracy and outstanding generalization *** order to enhance the interpretability of model decision-making,we used importance ranking to obtain the perception of machine learning model to 13 *** 13 variables include chemical composition of fly ash(SiO_(2)/Al_(2)O_(3),Si/Al),the ratio of alkaline liquid to the binder,curing temperature,curing durations inside oven,fly ash dosage,fine aggregate dosage,coarse aggregate dosage,extra water dosage and sodium hydroxide *** temperature,specimen ages and curing durations inside oven have the greatest influence on the prediction results,indicating that curing conditions have more prominent influence on the compressive strength of PFGC than ordinary Portland cement *** importance of curing conditions of PFGC even exceeds that of the concrete mix proportion,due to the low reactivity of pure fly ash.

关键词： machine learning pure fly ash geopolymer compressive strength feature perception

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静脉注射途径移植骨髓基质细胞的特点

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中国组织工程研究与临床康复 2007年第11期11卷 2102-2104页

作者：李淑波周艳鞠文博潘安娜李大宁北华大学医学院组织学与胚胎学教研室吉林省吉林市132013

目的:探讨在大鼠脑缺血的情况下经尾静脉注射移植骨髓基质细胞的可行性,为骨髓基质细胞脑移植治疗提供一种简捷、安全、有效的途径。方法:实验于2005-10/2006-08在北华大学医学院实验中心完成。取1～2个月龄SD大鼠双侧股骨和胫骨,体外... 详细信息

目的:探讨在大鼠脑缺血的情况下经尾静脉注射移植骨髓基质细胞的可行性,为骨髓基质细胞脑移植治疗提供一种简捷、安全、有效的途径。方法:实验于2005-10/2006-08在北华大学医学院实验中心完成。取1～2个月龄SD大鼠双侧股骨和胫骨,体外分离培养大鼠骨髓基质细胞。取体质量为280～320g的SD大鼠25只,采用颈内动脉线栓法制作大脑中动脉梗死模型,造模成功后在25只大鼠中随机盲抓分为2组:骨髓基质细胞移植组(n=15)、对照组(n=10)。骨髓基质细胞移植组经静脉缓慢推入含Hoeschst33342标记的骨髓基质细胞细胞悬液1mL(2.0×107个细胞),对照组用同样方法经尾静脉注入等量不含骨髓基质细胞的DMEM培养液作为对照。分别于移植后1d、7d、14d时间点对两组大鼠进行神经功能损害严重程度评分及大脑组织切片观察比较。结果:25只大鼠均进入结果分析。①各代细胞90%以上表达巢蛋白阳性。②与对照组相比,骨髓基质细胞移植组大鼠运动、神经功能恢复明显[骨髓基质细胞移植组:(6.10±2.96),(3.30±1.83),(2.10±1.20)分;对照组:(7.43±1.51),(6.14±1.35),(4.43±1.40)分,P<0.05]。③骨髓基质细胞移植组大鼠脑组织结构较清晰、完整;对照组大鼠脑组织破坏溶解,组织结构松散,细胞结构不完整,胞浆疏松,染色变浅,间质水肿。结论:通过静脉注射进行骨髓基质细胞移植,方法简便、安全,对神经损伤动物组织重建及神经功能有确切的修复效果。

关键词：骨髓基质细胞静脉注射移植

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β-巯基乙醇在大鼠骨髓基质细胞向神经干细胞诱导分化中的作用

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中国组织工程研究与临床康复 2007年第20期11卷 3991-3993页

作者：鞠文博李淑波周艳潘安娜李大宁北华大学医学院组织学和胚胎学教研室吉林省吉林市132013

目的:探讨骨髓基质细胞诱导分化为神经干细胞的更佳培养液组成。方法:实验于2005-10/2006-08在省级实验室北华大学医学院实验中心完成。①实验材料:体质量120～160g的Wistar大鼠,由北华大学动物中心提供。②实验方法:取120～160g大鼠3只... 详细信息

目的:探讨骨髓基质细胞诱导分化为神经干细胞的更佳培养液组成。方法:实验于2005-10/2006-08在省级实验室北华大学医学院实验中心完成。①实验材料:体质量120～160g的Wistar大鼠,由北华大学动物中心提供。②实验方法:取120～160g大鼠3只,体外分离培养大鼠骨髓基质细胞。培养约14d,待原代细胞贴满培养瓶,呈成纤维细胞样生长,用0.25%胰蛋白酶消化原代细胞约3min,在倒置显微镜下见贴壁细胞基本收缩成类圆形后,加入含胎牛血清的DMEM培养液终止消化,并将细胞液吹打均匀,以1×107L-1接种于2个细胞培养瓶中进行1∶2传代扩增培养。在传代培养细胞培养液中加入神经细胞诱导剂,选取生长良好的2,3,4代细胞进行实验。取第5代培养细胞,以8×103/cm2接种于预铺有盖玻片3.5cm培养皿中制备细胞爬片,每孔加入含体积分数为0.1胎牛血清的DMEM培养液2mL,达80%融合时更换新鲜培养液,并在培养液中加入1mmol/Lβ-巯基乙醇,诱导24h,磷酸盐缓冲液洗涤,换成含1mmol/Lβ-巯基乙醇的无血清培养液,5h后更换为改良神经细胞培养液,并设立未加入含β-巯基乙醇培养液的为对照。利用免疫组织化学方法检测神经元特有巢蛋白。结果:①培养的骨髓基质细胞形态学变化:接种初期,细胞贴壁生长是以分散的、克隆集落方式增殖,细胞呈圆形漂浮于培养液中,培养10d后,细胞形态基本为纺锤形的成纤维细胞样,偶有宽大扁平的多边形细胞,细胞逐渐长出小突起,出现出芽现象,14～20d后,突起细胞增多,突起延长并相互连接成网,具有神经细胞形态特征。②免疫组织化学染色检测神经元特有巢蛋白:1周左右,细胞可表达巢蛋白阳性,细胞大而圆,呈棕褐色,经培养诱导分化2周后的长突起细胞,表达神经元特异性抗原巢蛋白阳性细胞互相成网状连接。实验组第4代90%细胞巢蛋白阳性,在荧光显微镜下细胞发黄绿荧光,对照组第1代细胞约30%细胞呈巢蛋白阳性,荧光弱。结论:在诱导培养液中加入β-巯基乙醇,可明显促进骨髓基质细胞的分化,并可获得神经干细胞。

关键词：骨髓基质细胞碱性成纤维细胞生长因子分裂

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Manufacture the conducting polymer with light

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Science China Chemistry 2025年第1期68卷 8-9页

作者： Yang li Tianyu li Yan Ji Baoguang liu College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology) Nanjing University of Posts & Telecommunications

Poly(3,4-ethylenedioxythiophene) (PEDOT), heralded as the “king” of conducting polymers, is esteemed in bioelectronics for its mixed electronic and ionic conductivity, mechanical properties compatible with biological tissues, tunable healing ability and stability in diverse environments [1]. Based on additive manufacturing of three-dimensional structures,PEDOT realizes the implementation in the efficient production of flexible bioelectronics, the construction of intricate electrode-neural implantations, and the development of smart brain-computer-interfaces [2].

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