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Rational modulation of fluorophosphate cathode by anionic groups to reduce the polarization behavior for fast-charging sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 509-521页

作者： Xinyuan Wang Fan Zhang Xingyu Zhou Qian Wang Changyu liu yangyang liu hui Wang Xiaojie liu Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University

Na3V2（po4）2O2F （VP） is recognized as a promising cathode material for sodium-ion batteries due to its stable structural framework and high specific *** functional theory （DFT） and finite element simulations show that incorporating SO42-into VP decreases its band gap,lowers the migration energy barrier,and ensures a uniform Na+concentration gradient and stress distribution during charge and discharge ***,the average Na+diffusion coefficient of Na3V2（po4）1.95（SO4）0.05O2F（VPS-1） is roughly double that of VP,leading to enhanced rate capability (80 C,75.5 mAh g-1) and cycling stability (111.0 mAh g-1capacity after 1000 cycles at 10 C current density) for ***-1 exhibits outstanding fast-charging capabilities,achieving an 80%state of charge in just 8.1 *** assembled VPS-1//SbSn/NPC full cell demonstrated stable cycling over 200 cycles at a high 5 C current,maintaining an average coulombic efficiency of 95.35%.

关键词： Anionic group modulation polarization behavior Fast-charging Sodium-ion battery Fluorophosphate Cathode

Constructing mild expanded graphite microspheres by pressurized oxidation combined microwave treatment for enhanced lithium storage

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Rare Metals 2021年第4期40卷 837-847页

作者： Can-Liang Ma Zhen-hui Hu ning-Jing Song Yun Zhao yan-Zhen liu hui-Qi Wang Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province Institute of Molecular ScienceShanxi UniversityTaiyuan 030006China College of Chemistry and Chemical Engineering Jinzhong UniversityJinzhong 030619China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China School of Energy and power Engineering School of Material Science and EngineeringNorth University of ChinaTaiyuan 030051China

The modified graphite anode materials have some prominent advantages over other anode materials in the industrial applications.A novel simple and gentle method is proposed to synthesize the mild expanded graphite microspheres(MEGMs) from flake graphite spheres through a combined modified pressurized oxidation combined with the microwave *** microstructural results demonstrate that moderately expanded MEGMs with an expansion volume between 4 and 10 ml·g^(-1)exhibit a highly microporous structure with an enlarged interlayer spacing,a decreased microcrystalline size,as well as an increased number of functional groups on the surface,resulting in the increased storage sites and spaces for lithium ions and the enhanced diffusion rate of lithium *** used as the anode material for lithium-ion batteries,the MEGM-T75t30 obtained by oxidation treatment at 75℃ for 30 min followed by microwave irradiation for expansion displays a high reversible capacity of 446.7 mAh·g^(-1) at 100 mA·g^(-1) after 100 cycles and excellent rate performance(330 and 116 mAh·g^(-1) at 800 and 3200 mA·g^(-1),respectively).Therefore,the MEGMs prepared by this convenient and mild method show excellent electrochemical properties and good application potential.

关键词： Pressurized oxidation Microwave treatment Mild expanded graphite microspheres Microstructure Graphitic anode material Lithium-ion battery

Identification and geochemical significance of unusual C24 tetracyclic terpanes in Shahejie Formation source rocks in the Bozhong subbasin,Bohai Bay Basin

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Petroleum Science 2022年第5期19卷 1993-2003页

作者： ning Wang Yao-hui Xu Fei-Long Wang yan liu Qian Huang Xing Huang Key Laboratory of Exploration Technologies for Oil and Gas Resources Ministry of EducationYangtze UniversityWuhan430100China Hubei Key Laboratory of Petroleum Geochemistry and Environment(yangtze University) Wuhan430100China Bohai Petroleum Research Institute Tianjin BranchCNOOC(China)Ltd.Tianjin300452China

C_(24)tetracyclic terpanes are common compounds in source rocks and crude oils,and C_(24)17,21-secohopane is the most common and widely used source-related *** this study,three unusual C_(24)tetracyclic terpanes were detected on the m/z 191 chromatogram of saturated hydrocarbons in the Shahejie Formation source rocks in the Bozhong *** on the mass spectra characteristics,diagnostic ion fragments,retention time and comparisons with published literature,three unusual C_(24)tetracyclic terpanes were identified as 10β(H)-des-A-oleanane,10β(H)-des-A-lupane and C_(24)*** the best of our knowledge,this is the first study to detect and publicly report these three compounds in source rock samples from the Shahejie Formation of the Bozhong subbasin,Bohai Bay *** results indicated that 10β(H)-des-A-oleanane and 10β(H)-des-A-lupane likely originated from terre strial angiosperms,while C_(24)des-A-hopane likely originated fro m prokaryotic o *** rrestrial angiosperms provide the material basis for the generation of compounds A and B,and the distribution and concentration of these two compounds are affected by thermal *** the low maturity stage(0.5%pounds A and B are relatively enriched in the source rocks.

关键词： Unusual tetracyclic terpanes 10β(H)-des-A-oleanane 10β(H)-des-A-lupane Geochemical significance Shahejie Formation Bozhong subbasin

Linear/branched Block polyethylene Produced by a-Diimine Nickel(Ⅱ)Catalyst and Bis(phenoxy-imine)Zirconium Binary Catalyst System in the Presence of Diethyl Zinc

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Chinese Journal of polymer Science 2021年第12期39卷 1581-1589页

作者： Ding-Ding Zhao yan-hui Hou Ke-ning Zong Mi-Mi Cui Bin-Yuan liu Min yang Hebei Key Laboratory of Functional polymers Institute of Polymer Science and EngineeringHebei University of TechnologyTianjin 300130China State Key Laboratory of Separation Membranes and Membrane Processes School of Material Science and EngineeringTiangong UniversityTianjin 300160China

In order to promote development of linear/branched block polyethylenes based on new catalytic systems,we synthesized a novel *** nickel(Ⅱ)complex with isopropyl substituents on ortho-N-aryl and hydroxymethyl phenyl substituents on para-Naryl *** activity of a-dimine nickl(Ⅱ)catalyst was 3.02x10^(6)g-mol_(ni)^(-1)·h^(-1) at 70℃,and resultant polyethylene possessed 135/1000C *** linear/branched block polyethylenes were synthesized from ethylene polymerization catalyzed by the a-dimine nicke(Ⅱ)complex/bis(phenoxy-imine)zirconium in the presence of diethyI *** the addition of ZnEtz(from 0 to 400),the melting peak of resultant polyethylene changed from a single melting peak to bimodal melting *** molecular weights of resultant polyethylene ranging from 26.8 kg/mol to 17.1 kg/mol and PDI values varying gradually from 24.4 to 15.2 were obtained vla adjusting ZnEt;*** molar ratio of two *** addition,the branching degree of the polyethylene increased from 13/1000C to 56/1000 with the increase of the proportion of a dimine nickel(Ⅱ)*** this binary catalyst system,the reaction temperature of chain shutting polymerization can be carried out at 70℃,which is more conducive to industrial application.

关键词： Chain shuttling polymerization Linear/branched block polyethylene a-Diimine nickel Bis(phenoxy-imine)zirconium Ethylene

Prediction of miRNA Based on miRNA Biogenesis via One-class SVM

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Chemical Research in Chinese Universities 2010年第5期26卷 803-809页

作者： liu Yuan-ning yan Wen ZHANG Hao LI Zhi LU hui-jun LI Xin College of Computer Science and Technology Symbol Computation and Knowledge Engineering of Ministry of Education Jilin University Changehun 130012 P. R. China Institute of Military Veterinary Academy of Military Medical Sciences Changchun 130012 P. R. China Changchun University of Science ＆ Technology Changchun 130022 P. R. China

MicroRNAs are a class of small, single-stranded RNAs which are produced by non-protein-coding RNA genes with a length of 21-29 nt. They regulate the expression of protein-encoding genes at the post-transcriptional level and the degradation ofmRNAs by base pairing to mRNAs. Mature miRNAs are processed from 60-90 nt RNA hairpin structures called pre-miRNAs. At present, most of the machine learning computational methods for pre-miRNAs prediction are based on two-class SVM and use structural information of pre-miRNA hairpins. Those methods share a common feature that all of them need a negative dataset in the training dataset and feature selection in both training and testing dataset. In order to avoid selecting false negative examples of miRNA hairpins in the training dataset which may mislead the classifiers, we presented a microRNA prediction algorithm called MirBio based on miRNAs Biogenesis which is trained only on the information of the positive miRNAs class to predict miRNAs. It can predict both pre-miRNAs and miRNAs and get a relatively satisfying result in this study.

关键词： miRNAs Hairpin One-class classification miRNAs Biogenesis

Comparison of gut-associated and nest-associated microbial communities of a fungus-growing termite （Odontotermes yunnanensis）

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Insect Science 2010年第3期17卷 265-276页

作者： yan-Hua Long Lei Xie ning liu Xing yan Ming-hui Li Mei-Zhen Fan Qian Wang Provincial Key Laboratory of Microbial Pest Control Anhui Agricultural University Hefei Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai China

The digestion of cellulose by fungus-growing termites involves a complex of different organisms, such as the termites themselves, fungi and bacteria. To further investigate the symbiotic relationships of fungus-growing termites, the microbial communities of the termite gut and fungus combs of Odontotermes yunnanensis were examined. The major fungus species was identified as Termitomyces sp. To compare the micro-organism diversity between the digestive tract of termites and fungus combs, four polymerase chain reaction clone libraries were created （two fungus-targeted internal transcribed spacer [ITS] - ribosomal DNA [rDNA] libraries and two bacteria-targeted 16S rDNA libraries）, and one library of each type was produced for the host termite gut and the symbiotic fimgus comb. Results of the fungal clone libraries revealed that only Termitomyces sp. was detected on the fungus comb; no non-Termitomyces fungi were detected. Meanwhile, the same fungus was also found in the termite gut. The bacterial clone libraries showed higher numbers and greater diversity of bacteria in the termite gut than in the fungus comb. Both bacterial clone libraries from the insect gut included Firmicutes, Bacteroidetes, Proteobacteria, Spirochaetes, Nitrospira, Deferribacteres, and Fibrobacteres, whereas the bacterial clone libraries from the fungal comb only contained Firmicutes, Bacteroidetes, Proteobacteria, and Acidobacteris.

关键词： fungus comb gut ITS phylotype termite Termitomyces

Hydroxylated graphene quantum dots as fluorescent probes for sensitive detection of metal ions

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International Journal of Minerals,Metallurgy and Materials 2020年第1期27卷 91-99页

作者： Qiang Ge Wen-hui Kong Xin-qian liu Ying-min Wang Li-feng Wang ning Ma yan Li Department of Inorganic Nonmetallic Material School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China College of Materials Science and Chemical Engineering Harbin Engineering UniversityHarbin 150001China

Highly sensitive methods are important for monitoring the concentration of metal ions in industrial ***,we developed a new probe for the determination of metal ions by fluorescence *** probe consists of hydroxylated graphene quantum dots(H-GQDs),prepared from GQDs by electrochemical method followed by surface *** is a non-reactive indicator with high sensitivity and detection limits of 0.01μM for Cu2+,0.005μM for Al3+,0.04μM for Fe3+,and 0.02μM for Cr3+.In addition,the low biotoxicity and excellent solubility of H-GQDs make them promising for application in wastewater metal ion detection.

关键词： graphene quantum dots surface hydroxylation metal ions detection fluorescent probes

Diagnosis,fetal risk and treatment of pemphigoid gestationis in pregnancy:A case report

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World Journal of Clinical Cases 2021年第34期9卷 10645-10651页

作者： Hai-ning Jiao Ye-Ping Ruan yan liu Meng Pan hui-Ping Zhong Department of Obstetrics and Gynecology Rui-Jin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Department of Dermatology Rui-Jin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China

BACKGROUND Pemphigoid gestationis(PG)is a rare autoimmune blistering disease that usually presents in the second or third trimester,with an incidence of 1 per 50000 *** tends to recur with an earlier onset and a more severe course in subsequent *** biopsy markers can be confirmed by direct immunofluorescence *** SUMMARY Our patient was diagnosed with PG at 8 mo of gestation with fresh bullous lesion marks on the abdomen and *** of the pregnancy was performed by cesarean section at 37+4 wk of *** patient delivered an infant weighing 3620 *** infant had urticaria-like and vesicular skin lesions and was diagnosed with *** patient was discharged on prednisolone and in a satisfactory *** infant was discharged after anti-inflammatory therapy for one *** PG is a rarely reported disease,and 10%of newborns develop mild clinical symptoms consisting of urticaria-like or vesicular skin *** intend to remind clinicians to consider this condition when a patient presents with such lesions so that treatment can be started early and neonatal morbidity can be taken into account.

关键词： Pemphigoid gestationis Pregnancy Newborn Pemphigus Fluorescent antibody techniqu Case report

Temperature Rise Characteristics of Carbon-Containing Chromite Ore Fines in Microwave Field

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Journal of Iron and Steel Research International 2008年第1期15卷 1-5页

作者： LI ning CHEN Jin yan Hong FENG Xiu-mei CUI hui-jun liu Jin-ying College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 Shanxi China No. 12 Research Institute China Electronics Technology Group Corporation Beijing 100016 China

To avoid the nonuniform phenomena of heat and mass transfer of metallurgical powdery materials caused by conventional heating method,the temperature rise characteristics of carbon-containing chromite ore fines in the microwave field were investigated using microwave heating in a microwave metallurgical *** experimental results show that the carbon-containing chromite ore fines have better temperature rise characteristics in the microwave field at a frequency of 2.45 *** heated in the microwave field of 10 kW,the temperature of 1 kg carbon-containing chromite ore fines rose up to 1 100 ℃ in 7 min,at a temperature rise rate of 157.1（℃·min-1·kg-1）,whereas the temperature of 1 kg carbon-containing magnetite ore fines rose only up to 1 000 ℃ in 10 min,at a temperature rise rate of 100（℃·min-1·kg-1）.With increasing carbon-fitting ratios and by adding calcic lime,their heating effects changed regularly.

关键词： carbon-containing chromite ore fine carbon-containing magnetite ore fine microwave fieldl temperature rise characteristics