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Biocarbon with different microstructures derived from corn husks and their potassium storage properties

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Rare Metals 2021年第11期40卷 3166-3174页

作者： Meng zhou qing Wang yuan yuan Shao-Hua Luo Ya-hui Zhang xin liu School of Materials Science and Engineering Northeastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China Hebei Key Laboratory of Dielectric and Electrolyte Functional Material Qinhuangdao 066004China Qinhuangdao Key Laboratory of Advanced Energy Storage and Conversion Technology Qinhuangdao 066004China

In this paper,biocarbon was prepared from corn husks as anode materials for potassium ion batteries at temperatures ranging from 700 to 1600℃.The prepared biocarbon materials have amorphous phase structure and possess larger interlayer spacing than *** biocarbon exhibits enhanced graphitic degree and decreased amounts of surface defects,while the carbonization temperature gradually *** obtained potassium ion battery electrode at 1300℃ acquired high reversible capacity up to 216.6 mAh·g^(-1) at 0.1 A·g^(-1) after 100 cycles, and retained 128.6 mAh·g^(-1) at 1 A·g^(-1) even after500 *** results indicate that the samples prepared at 1300℃ have better electrochemical performance than other samples prepared at different temperatures,which was attributed to the decisive influence of microstructure on surface-induced and intercalating potassium storage.

关键词： Biocarbon Potassium ion battery Carbonization Capacitance Electrochemical performance

Modular assembly of Co4-thiacalix[4]arene units and Keggin-type SiW12O40 for visible-light photothermal conversion

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Tungsten 2025年第1期 112-119页

作者： Jia-hui li qing Zhao Dong-Ao Mao Kun zhou Bao-Kuan Chen Yan-Feng Bi School of Petrochemical Engineering Liaoning Petrochemical University

The construction of metal-organic coordination clusters（MCCs） using modular secondary building units is an important method for preparing functional *** this study,two new MCCs modularly assembled from Keggin-type {SiW12O40}H4TC4A=p-tert-Butylthiacalix[4]arene(SiW12) units and thiacalixarene-supported Co4-thiacalix[4]arene(Co4-TC4A polynuclear second-building units（PSBUs,H4TC4A=p-tert-Butylthiacalix[4]arene） are *** two MCCs,abbreviated as Co4-SiW12and Co8-SiW12,were structurally characterized by single-crystal X-ray *** Co4-SiW12is a supramolecular structure involving cation-anion interactions between Co4-TC4A PSBUs and ***8-SiW12features "barbell-like" shapes with two Co4-TC4A coordinatively linked to a Keggin-type SiW12unit on opposite via W-O_t-Co *** coordination of Co4-TC4A to SiW12in Co8-SiW12resulted in significantly improved photothermal conversion performances compared with Co4-SiW12and pure SiW12or ***-gap determination and photophysical analysis combined with density functional theory calculations indicated the binding mode between Co4-TC4A PSBUs and SiW12,which considerably influences the way of electron transport and the conversion ability of visible light to heat.

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Quinoxaline-based Polymers with Asymmetric Aromatic Side Chain Enables 16.27% Efficiency for Organic Solar Cells

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Chinese Journal of Polymer Science 2023年第7期41卷 1002-1010页

作者： Dong-Xu li Shu-Fang li Cheng-Long Wen Chao-yuan Sun Chang-zhou Shi xin-xin Xia xin-hui Lu li-hui Jiang Jun yuan Ying-Ping Zou College of Chemistry and Chemical Engineering Central South UniversityChangsha410083China Department of Physics The Chinese University of Hong KongNew TerritoriesHong Kong999077China

In recent years, due to the rapid development of high-performance small molecule acceptor (SMA) materials, the researches on p-type electron donor materials for matching with current efficient SMAs have become important. By means of asymmetric strategies to optimize the energy levels and inter/intramolecular interactions of molecules, we designed and synthesized an asymmetric aromatic side chain quinoxaline-based polymer donor TPQ-0F. Meanwhile, we took advantage of F atom which could form noncovalent interaction and strong electron-withdrawing property, to obtain the optimized quinoxaline-based polymer donors TPQ-1F, TPQ-1Fi and TPQ-2F. Eventually, the binary device based on TPQ-2F achieved an efficient power conversion efficiency (PCE) of 16.27%, which attributed to balanced hole/electron mobilities, less charge carrier recombination, and more favorable aggregation morphology. Our work demonstrates the great potential of asymmetric aromatic side chain quinoxaline-based polymer donors on optimizing the morphology of blending films, improving inter/intramolecular interactions, and subtly tuning energy level, finally for more efficient organic solar cells.

关键词： Asymmetric aromatic side chain Quinoxaline-based polymer donor Fluorine substitution Binary device

Synergistic Optimization of Toughness and EMI Shielding Properties in Rigid Polyurethane Composites by Designing Ring Structures on the Surface of Carbon Fibers

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Chinese Journal of Polymer Science 2023年第12期41卷 1958-1968,I0010页

作者： Yi-Long zhou Wei-Wei li hui-xin liu Kai-yuan Pei Shi-Ting li School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China

How to achieve both toughness and enhanced electromagnetic interference shielding effectiveness(EMI SE)of carbon fibers(CFs)reinforced rigid polyurethane(RPU)composites is a significative challenge at *** this work,a ring-shaped zinc coating was deposited on the short CFs by electrodeposition *** is expected to improve the interfacial properties between the fibers and the resin matrix as well as enhance the EMI shielding properties of the composites by changing the surface morphology and roughness of the *** showed that the surface free energy of the ring-shaped zinc modified carbon fibers(RS-CFs)increased from 49.0 mJ/m^(2) to 53.2 mJ/m^(2),indicating that the surface roughness and wettability of the CFs were effectively *** comparison with the pristine short carbon fibers/rigid polyurethane(CFs/RPU)composites,tensile strength and tensile toughness of RS-CFs modified composites were increased by 27.1% and 121.4%,*** addition,the bending and impact strengths of RS-CFs reinforced RPU composites were also ***,the electrical conductivity of RS-CFs/RPU composites reached 1.2×10^(-5) S/m,which was much higher than that of CFs/RPU composites at 1.4×10^(-10) S/***,the EMI SE of the modified composites reached 22 dB,which was 152.9% higher than that of CFs/RPU *** enhanced electrical conductivity and EMI shielding properties of the composites could be attributed to the synergistic effect of the porous structure in the RPU matrix and the CFs modified by the metal coating.

关键词： Carbon fiber Surface decoration Rigid polyurethane Mechanical properties EMI shielding

Visible-light induced cascade radical cyclization of sulfinic acids and o-(allyloxy)arylaldehydes towards functionalized chroman-4-ones

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Chinese Chemical Letters 2020年第12期31卷 3255-3258页

作者： Guang-hui li qing-qing Han yuan-yuan Sun De-Mao Chen Zu-li Wang xin-Ming Xu Xian-Yong Yu College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingda 266109China College of Chemistry and Chermical Engineering Yantai UniversityYantai 264005China School of Chernistry and Chemical Engineering Hunan UIniversity of Science and TechnologyXiangtan 411201China

An efficient method for the synthesis of functionalized chroman-4-ones induced by visible light via the radical cyclization reaction of sulfinic acids and o-(allyloxy)arylaldehydes at room temperature was *** corresponding products were isolated with moderate to good *** mechanism was proposed fo r this trans ***-microbial activity of some desired compounds we re screened.

关键词： Visible light Sulfinic acids Radical cyclization Chroman-4-one o-(Allyloxy)arylaldehydes

Fast li-ion conduction enabled by graphite fluoride flakes in solid polymer electrolyte

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Rare Metals 2023年第10期42卷 3337-3344页

作者： qing-hui li Xiao-Fen Wang Shi-yuan Zhu qing-Dong Zhong Song-li liu Qiong-Yu zhou School of Electrical and Information Engineering Changsha University of Science and TechnologyChangsha410114China School of Materials Science and Hydrogen Energy Foshan UniversityFoshan528000China School of Materials Science and Engineering Shanghai UniversityShanghai200444China School of Materials Science and Engineering Yangtze Normal UniversityChongqing400715China

The li-metal anode in rechargeable li-metal batteries with a high energy density suffers the side reaction with the liquid electrolytes,resulting in the associated capacity degradation and safety *** electrolytes are designed to solve the safety problems caused by dendrite growth and the limited electrochemical stability of liquid ***,a poly(ethylene oxide)(PEO)-lithium bis(trifluoromethanesulfonyl) imide(liTFSI) solid polymer electrolyte(SPE) with cost-wise.

关键词： electrolyte conduction polymer

Nanocrystallization of Amorphous Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 Irradiated by Laser

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Journal of Iron and Steel Research International 2005年第5期12卷 58-62页

作者： CHEN Sui-yuan liU Chang-sheng zhou li li hui-li CAI qing-kui Northeastern Univcrsity Shenyang 110004 China

The surface nanocrystallization of amorphous Fe73.5 Cu1Nb3Si13.5B9 radiated by CO2 laser was studied by means of M（oe）ssbauer spectroscopy, transmission electro iroscope and X-ray diffraction. The result shows that under certain technical conditions, nanocrystalline is fiound on the surface of amorphous Fe73.5 Cu1Nb3Si13.5B9 radiated by laser; the crystallization phase is α-Fe（Si） crystalline, and its size is about 10-20 nm; the nanocrystalline is uniformly distributed on amorphous base to keep the amorphous and crystallized phase in balance; the a mount of crystallization reaches 23% when the laser power is 300 W, the diameter of light spot is 20 mm, and the radiation speed is 20 mm/s. The phase balance can be controlled by adjusting the laser technology parameter. Laser radiation on the amorphous Fe73.5 Cu1Nb3Si13.5B9 alloy is an important technique for surface nanocrystallization of the amorphous alloys.

关键词： CO2 laser amorphous alloy Fe73.5 Cu1Nb3Si13.5B9 nanocrystallization

Identification of late-onset hypogonadism in middle-aged and elderly men from a community of China

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Asian Journal of Andrology 2016年第5期18卷 747-753页

作者： Zhi-Yong liu Ren-yuan zhou xin Lu Qin-Song Zeng hui-qing Wang Zheng li Ying-Hao Sun Department of Urology Changhai Hospital Second Military Medical University Shanghai China Department of Urology Fifth People's Hospital of ShanghaiFudan University Shanghai China Department of Urology Renji Hospital Jiao Tong University Shanghai China

In this study, we investigated the essential criteria for late-onset hypogonadism （LOH） syndrome based on the presence of symptoms associated with low testosterone levels in Han Chinese men. Blood tests for total testosterone （TT） and sex hormone-binding globulin （SHBG） were performed, and the aging male symptoms （AMS） questionnaire was conducted in a randomly selected cohort composed of 944 Chinese men aged 40 to 79 years from nine urban communities. Three sexual symptoms （decreased ability/frequency of sexual activity, decreased number of morning erections, and decreased libido） were confirmed to be related to the total and free testosterone levels. The thresholds for TT were approximately 12.55 nmol l^-1 for a decreased ability/frequency to perform sex, 12.55 nmol l^-1 for decreased frequency of morning erections, and 14.35 nmol l^-1 for decreased sexual desire. The calculated free testosterone （CFT） thresholds for these three sexual symptoms were 281.14, 264.90, and 287.21 pmol l^-1, respectively. TT 〈13.21 nmol l^-1 （OR =1.4, 95%Ch 1.0-1.9, P= 0.037） or CFT 〈268.89 pmol l^-1 （OR - 1.5, 95%Ch 1.1-20, P=0.020） was associated with an increase in the aforementioned three sexual symptoms. The prevalence of LOH was 9.1% under the criteria, including all three sexual symptoms with TT levels 〈13.21 nmol l^-1 and CFT levels 〈268.89 pmol l^-1. Our results may improve the diagnostic accuracy of LOH in older men.

关键词： diagnosis hypogonadism middle-aged and elderly male reference values sexual dysfunction testosterone

Asian summer monsoon responses to the change of land‒sea thermodynamic contrast in a warming climate:CMIP6 projections

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Advances in Climate Change Research 2022年第2期13卷 205-217页

作者： qing-yuan WU qing-Quan li Yi-hui DING xin-Yong SHEN Meng-Chu ZHAO Yu-Xiang ZHU Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory on Climate and Environment ChangeNanjing University of Information Science&TechnologyNanjing 210044China bLaboratory for Climate Studies National Climate CentreChina Meteorological AdministrationBeijing 100081China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Training Centre China Meteorological AdministrationBeijing 100081China

It is of practical significance to use the updated Coupled Model Intercomparison Project Phase 6(CMIP6)models to study the impact of changes in land‒sea thermodynamic contrast(TC)on the Asian summer monsoon under different scenarios and to compare the similarities and differences of the impact mechanisms between different monsoon *** this study,we investigated future changes of the Asian summer monsoon under four Shared Socioeconomic Pathway(SSP)scenarios using 19 CMIP6 *** intensity of the South Asian summer monsoon(SASM)is projected to decrease by 2.6%,6.3%,10.1%,and 11.1%,while the East Asian summer monsoon(EASM)intensity is projected to increase by 4.6%,7.9%,7.4%,and 9.8%until the end of the 21st century for SSP126,SSP245,SSP370,and SSP585 scenarios,***,summer precipitation in Asia is projected to increase remarkably in 2015-2099 under all four *** inconsistent warming trends over the Tibetan Plateau(TP),Northwest Pacific,and tropical Indian Ocean would greatly impact the monsoon *** upper-troposphere warming trend over the surrounding oceans is remarkably greater than that over the TP,while the near-surface warming trend over the surrounding oceans is smaller than that over the *** decrease of upper-troposphere TC between the TP and tropical Indian Ocean results in a weakening of the SASM *** enhancement of the lower-troposphere TC between the TP and Northwest Pacific would strengthen the EASM *** budget analysis shows that the water-vapor would increase in the future,which would thermodynamically enhance summer precipitation through the anomalous vertical moisture transport associated with mean *** strengthening of the meridional circulation of the EASM would increase monsoon precipitation,while the weakening of zonal circulation of the SASM would dynamically reduce South Asian summer precipitation.

关键词： South Asian summer monsoon East Asian summer monsoon Land‒sea thermodynamic contrast Global warming CMIP6 projection