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Enlarged interlayer of separator coating enabling high-performance lithiumsulfur batteries

Frontiers of Chemical Science and Engineering 2024年第2期18卷 103-112页

作者： Yanqi Feng Hui liu xiaoting liu Qiongqiong Lu School of Materials&Environment Engineering Chengdu Technological UniversityChengdu 611730China School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi’an 710021China Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001China Institute of Materials Henan Key Laboratory of Advanced Conductor MaterialsHenan Academy of SciencesZhengzhou 450046China Leibniz Institute for Solid State and Materials Research(IFW) Dresden e.V.Dresden 01069Germany

Lithiumsulfur batteries have been intensively studied due to their high theoretical energy density and abundant sulfur resources. However, their commercial application is hindered by the low redox kinetics and high sulfur losses. In principle, in the design of cathodes and separators, the adsorption toward lithium-polysulfides should be enhanced and the conversion of soluble high-order lithium-polysulfides should be catalyzed. Herein, a KV_(3)O_(8)·0.75H_(2)O separator is designed as an effective lithium-polysulfides mediator in lithiumsulfur batteries. The intercalated K+ would enlarge the interlayer spacing of vanadium oxides, preventing the collapse of the layer structure and improving the electrical/ion conductivity of the interface. Moreover, the KV_(3)O_(8)·0.75H_(2)O modified separator possess a prior adsorption and high redox kinetics toward lithium-polysulfides due to the enhanced diffusion kinetics, which guarantees the high-rate capability and efficient utilization of sulfur. As a result, lithiumsulfur batteries exhibit a high capacity of 1362 mAh·g^(-1) and a long lifespan with a low capacity loss of 0.073% per cycle. This work may provide an alternative way to establish a functional separator to balance the adsorption and conversion of polysulfides during the redox back and forth.

关键词： lithium kinetics adsorption

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Understanding pitting corrosion behavior of AZ91 alloy and its MAO coating in 3.5%NaCl solution by cyclic potentiodynamic polarization

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Journal of Magnesium and Alloys 2022年第5期10卷 1368-1380页

作者： Yuxiang liu Zhu liu Anyang Xu xiaoting liu National Key Laboratory for Remanufacturing of China 21 DujiakanFengtai DistrictBeijing 100072China School of Materials The University of ManchesterManchester M139PLUK

The pitting corrosion behavior of AZ91 alloy before and after micro-oxidation treatment in 3.5%Na Cl solution was investigated by cyclic potentiodynamic polarization(CPDP)and optical and SEM observations of corroded surfaces at different polarization *** CPDP results show that both the alloy and the MAO-coated alloy suffer from pitting corrosion and it is difficult for pits to stop growth once the pits *** is revealed that the air-formed Mg O film on AZ91 alloy,the MAO coating along with corrosion products(mainly Mg(OH))formed during CPDP can significantly influence the kinetics of the redox reactions of Mg,and further influence the propagation behavior of pitting *** optical and SEM images show that the corrosion products on AZ91 alloy are dense and protective but on the MAO-coated corrosion products are very *** observations support the analyses of CPDP results that pits on AZ91 alloy spread to the width whereas pits on MAO-coated alloy propagate to the ***,pitting corrosion on the MAO-coated alloy can be very severe once the coating ruptures and post-treatments are necessary to provide a promising corrosion protection for the Mg alloys.

关键词： AZ91 alloy MAO coating Pitting corrosion behavior Cyclic potentiodynamic polarization

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Microstructure, mechanical properties and toughening mechanism of directional Fe2B crystal in Fe-B alloy with trace Cr addition

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Journal of Materials Science & Technology 2020年第22期54卷 172-179页

作者： Yongxin Jian Zhifu Huang xiaoting liu Jialin Sun Jiandong Xing State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXian710049China

Exploring the effective way to improve Fe2 B's toughness has always been the hot topic in the researches of Fe-B wear resistant *** the present work,the effects of Cr on the microstructure,mechanical properties and lattice structure of directional Fe2 B have been *** affecting mechanism of Cr addition has been discussed according to the experimental and first-principle calculation *** results show Cr addition can improve the toughness of directional Fe2 B on the longitudinal sections perpendicular to(002) crystal plane,without sacrificing the hardness *** toughening mechanism by Cr substitution has been revealed:Cr addition enriches the electron density between the B atoms along [002] direction,contributing to the shrinkage of the bond length and the enhancement of the bond strength of B-B *** obtained results provide insight into the intrinsic reason for toughening Fe2 B by Cr doping.

关键词： Directional Fe2B Cr addition Lattice evolution Toughening mechanism

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Measuring China's Real Estate Financial Innovation from the Perspective of Government,Enterprises and the Public:Index Compilation and Its Spatial-Temporal Characteristics Analysis

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Journal of Systems Science and Information 2023年第1期11卷 1-34页

作者： Jichang DONG Lijun YIN xiaoting liu Xiuting LI School of Economics and Management University of Chinese Academy of SciencesBeijing 100190China Key Laboratory of Big Data Mining and Knowledge Management Chinese Academy of SciencesBeijing 100190China China Construction Second Engineering Bureau Co.Ltd Beijing 100070China

In recent years,China has witnessed the rapid development in housing finance,and there have emerged constantly real estate finance innovations;however,there exists no relevant index for measuring the innovations of China's real estate *** on the perspectives of the governments,enterprises and the public,this paper constructs the"innovation index of real estate finance"on a quarterly basis from 2009 to 2019,with the method of empowerment which combines the subjective method(analytic hierarchy process)and the objective one(range coefficient method).It clearly and concretely depicts the innovations in housing finance and the related temporal-spatial characteristics in China since the outbreak of the financial crisis in *** index covers 30 provinces,autonomous regions and municipalities directly under the central government,and analyzes its temporal and spatial *** findings show that there exist a strong spatial autocorrelation and a big regional difference in innovations.

关键词： governments enterprises public real estate finance innovation

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O/N/S trifunctional doping on graphite felts:A novel strategy toward performance boosting of cerium-based redox flow batteries

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Carbon Energy 2021年第5期3卷 752-761页

作者： Zhaolin Na Xinran Wang xiaoting liu Wenjing Li Xudong Sun Liaoning Engineering Laboratory of Special Optical Functional Crystals College of Environmental and Chemical EngineeringDalian UniversityDalianChina Foshan Graduate School Northeastern UniversityFoshanChina

The cerium-based redox flow battery(RFB)is regarded as a compelling gridscale energy storage technology to revolutionize the utilization of renewable energy by storing the energy in liquid ***,its widespread implementation is impeded by the cerium redox reactions that exhibit slow kinetics on commercial graphite felt(GF)*** functionalization may be an available activation strategy to achieve a significant boost in the electrochemical performance of ***,conventional chemical and/or electrochemical routes for the surface functionalization of GFs suffer from the issues of complication,and the deterioration of the resulting modified electrode surface over long-term cycle processes leads to catalytic activity ***,we develop a facile and general strategy for introducing the functional groups to the electrode through the addition of L-cysteine into ***-COOH,-NH_(2),and-SH groups in L-cysteine can induce oxygen/nitrogen/sulfur trifunctional doping on GF surfaces with lower deterioration rates,which enables the activated GFs to demonstrate a promising electrocatalytic activity toward cerium redox reactions and excellent durability when used as a cerium-based RFB *** study proposes a rational strategy to overcome the intrinsic limitations of existing modification techniques for GFs and provides a potential pathway toward high-performance RFBs.

关键词： additive cerium electrocatalysis graphite felt redox flow battery

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[(CH_(3))_(4)N]_(2)Mn_(0.6)Zn_(0.4)Br_(4):Lead-free MnII-based hybrid halide with high photoluminescence quantum yield for backlight displays

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Nano Research 2023年第4期16卷 5894-5899页

作者： xiaoting liu Jiapeng Yang Wenya Chen Fan Yang Yihuang Chen Xiaojuan Liang Shuang Pan Weidong Xiang College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China College of Life and Environmental Science Wenzhou UniversityWenzhou 325035China

High efficient lead halide perovskites with wide-color gamut properties have emerged as new candidates for backlight ***,the toxicity of lead and the instability of halide perovskites greatly limit their practical ***,the luminescent powders of[(CH_(3))4N]2MnBr_(4)and[(CH_(3))4N]MnBr3 were synthesized via a simple yet robust solvent evaporation method.[(CH_(3))4N]2MnBr_(4)with tetrahedral coordination Mn^(2+)and[(CH_(3))4N]MnBr3 with octahedral coordination Mn^(2+)show green at 517 nm and red emission peaks at 620 nm,respectively,originating from the^(4)T1-^(6)A_(1)transition of Mn^(2+).To enhance optical of manganese halide via effective alloying,Zn^(2+)-doped[(CH_(3))4N]2MnBr_(4)was successfully prepared,and the quantum efficiency of[(CH_(3))_(4)N]_(2)Mn_(0.6)Zn_(0.4)Br_(4)was as high as 65%.Furthermore,[(CH_(3))4N]2Mn0.6Zn0.4Br_(4)exhibits better optical and thermal stability compared to[(CH_(3))4N]2MnBr_(4).[(CH_(3))_(4)N]_(2)Mn_(0.6)Zn_(0.4)Br_(4)@CsPbBr_(1.2)I_(1.8)light conversion films with different green-to-red ratios are placed in backlight display devices,and their color gamut exceeds 106%of the National Television Standards Committee(NTSC)1953 standard,which is superior to the currently reported Mn-based *** work broadly shows that the[(CH_(3))_(4)N]_(2)Mn_(0.6)Zn_(0.4)Br_(4)will provide effective route to fabricate stable and high-performance lead-free liquid crystal displays.

关键词： [(CH3)4N]MnBr3 [(CH3)4N]2Mn0.6Zn0.4Br4 stability Zn/Mn alloying backlight display

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Variation and stability analysis of growth traits of poplar clones in the seedling stage in northeast China

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Journal of Forestry Research 2023年第4期34卷 1107-1116页

作者： xiaoting liu Qiushuang Zhao Peng Yin Hanxi Li Xuesong Li Liguo Wu Yueji Li Yanbo Hu Xiyang Zhao State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China College of Forestry and Grasslands Jilin Agricultural UniversityChangchun 130118People’s Republic of China Dongling State-Owned Forest Protection Center Songyuan 138000People’s Republic of China Cuohai Forest Farm of Longjiang Qiqihar 161000People’s Republic of China Baicheng State-Owned Forest Farm Baicheng 137000People’s Republic of China

Plant phenotypes are infl uenced by genetic and environmental *** this study,the growth traits of 43 one-year-old poplar clones grown at diff erent sites in northeast China(Dongling State-owned Forest Protection Center,DL;Baicheng State-owned forest farm,BC;and Cuohai Forest farm,CH)were evaluated and analyzed across clones and *** show signifi cant diff erences in height and base diameter among sites and *** and genetic variation coeffi cients ranged from 49.59%(BC)to 58.39%(DL)and from 49.33%(BC)to 58.06%(DL),*** main eff ects and multiplicative interaction(AMMI)analysis showed that the eff ects of genotype,environment,and genotype×environment interaction were signifi cantly diff *** variation was the main source of variation,accounting for 48.6%.AMMI biplot showed that clone 30 had high and stable yields at the three *** an evaluation of multiple traits and GGE biplot that clone 2,clone 30 and clone 25 had higher yield than the other clones at DL,CH and BC,*** clones will provide material for forest regeneration in northeast China.

关键词： Populus Genetic variation Genotype×environment interaction AMMI model GGE biplot

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A kidney-brain neural circuit drives progressive kidney damage and heart failure

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Signal Transduction and Targeted Therapy 2023年第6期8卷 3087-3097页

作者： Wei Cao Zhichen Yang xiaoting liu Siqiang Ren Huanjuan Su Bihui Yang Youhua liu Christopher S.Wilcox Fan Fan Hou Division of Nephrology Nanfang HospitalSouthern Medical UniversityState Key Laboratory of Organ Failure ResearchNational Clinical Research Center of Kidney DiseaseGuangdong Provincial Institute of NephrologyGuangzhouPR China Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence Key Laboratory of Mental Health of the Ministry of EducationGuangdong Province Key Laboratory of Psychiatric DisordersSouthern Medical UniversityGuangzhouGuangdongChina Division of Nephrology and Hypertension Georgetown University Medical CentralWashingtonDCUSA

Chronic kidney disease(CKD)and heart failure(HF)are highly prevalent,aggravate each other,and account for substantial ***,the mechanisms underlying cardiorenal interaction and the role of kidney afferent nerves and their precise central pathway remain ***,we combined virus tracing techniques with optogenetic techniques to map a polysynaptic central pathway linking kidney afferent nerves to subfornical organ(SFO)and thereby to paraventricular nucleus(PVN)and rostral ventrolateral medulla that modulates sympathetic *** kidney-brain neural circuit was overactivated in mouse models of CKD or HF and subsequently enhanced the sympathetic discharge to both the kidney and the heart in each *** of the pathway by kidney deafferentation,selective deletion of angiotensin II type 1a receptor(AT1a)in SFO,or optogenetic silence of the kidney-SFO or SFO-PVN projection decreased the sympathetic discharge and lessened structural damage and dysfunction of both kidney and heart in models of CKD and ***,kidney afferent nerves activate a kidney-brain neural circuit in CKD and HF that drives the sympathetic nervous system to accelerate disease progression in both *** results demonstrate the crucial role of kidney afferent nerves and their central connections in engaging cardiorenal interactions under both physiological and disease *** suggests novel therapies for CKD or HF targeting this kidney-brain neural circuit.

关键词： kidney damage organs

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Polyoxometalate-Based Ionic Frameworks for Highly Selective CO_(2) Capture and Separation

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CCS Chemistry 2021年第11期3卷 2676-2687页

作者： Fengxue Duan xiaoting liu Di Qu Bao Li Lixin Wu State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012

During the utilization of structural and functional advantages of polyoxometalates(POMs)for enhanced applications,a suitable assembly of these clusters in framework materials to act as binding nodes represents a promising *** contrast to well-developed coordination/covalent combinations,we have developed a convenient strategy to build porous structures of POMs with smaller-sized counterions as bridging ligands via ionic interactions to reinforce their capability in gas adsorption in parallel to metal-organic frameworks(MOFs)/covalent organic frameworks(COFs).With this goal,a series of POMs-based ionic frameworks(IFs)were constructed with triol-ligand modified Anderson-Evans-type clusters as building blocks,and their sodium counter-cations were used as *** three-dimensional(3D)open-frameworks obtained displayed unusually selective CO_(2) capturing capability and efficient separation from their N_(2),H_(2),and CH_(4) mixtures under low pressure at room *** the synthesized IFs,the cobalt-centered cluster exhibited the best performance for the uptake and selective separation of CO_(2) over N_(2) and CH_(4) in a range of 0-1 bar,while the nickel-centered cluster displayed the highest selectivity over H_(2) at 1 *** experiments based on real binary gas mixtures demonstrated that the cobalt-containing framework illustrated high performance in the actual gas separation and sustained stability against a simulated operating environment.

关键词： ionic frameworks polyoxometalates carbon dioxide adsorption gas separation

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Measuring China's Real Estate Financial Innovation from the Perspective of Government， Enterprises and the Public: Index Compilation and Its Spaital-temporal Characteristics Analysis.

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Journal of Systems Science and Information 2022年

作者： Jichang DONG Lijun YIN xiaoting liu Xiuting LI Key Laboratory of Big Data Mining and Knowledge Management， Chinese Academy of Science China Construction Second Engineering Bureau Co.Ltd School of Economics and Management， University of Chinese Academy of Sciences

In recent years， China has witnessed the rapid development in housing finance， and there have emerged constantly real estate finance innovations; however， there exists no relevant index for measuring the innovations of China’s real estate finance. Based on the perspectives of the governments， enterprises and the public， this paper constructs the “Innovation Index of Real Estate Finance” on a quarterly basis from 2009 to 2019， with the method of empowerment which combines the subjective method (Analytic Hierarchy Process) and the objective one (Range Coefficient Method). It clearly and concretely depicts the innovations in housing finance and the related temporal-spatial characteristics in China since the outbreak of the financial crisis in 2008. The index covers 30 provinces， autonomous regions and municipalities directly under the central government， and analyzes its temporal and spatial characteristics. The findings show that there exist a strong spatial autocorrelation and a big regional difference in innovations.

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