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Electrolyte solvation chemistry for lithium-sulfur batteries with electrolyte-lean conditions

Journal of Energy Chemistry 2021年第4期30卷 80-91页

作者： Long Kong Lihong Yin Fei Xu Juncao Bian huimin yuan Zhouguang Lu Yusheng Zhao Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055GuangdongChina Department of Physics Southern University of Science and TechnologyShenzhen 518055GuangdongChina Department of Materials Science and Engineering Guangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhen 518055GuangdongChina Technische Universität Dresden Bergstrasse 6601062DresdenGermany

Lithium-sulfur(Li-S)batteries possess overwhelming energy density of 2654 Wh kg-1,and are considered as the next-generation battery technology for energy demanding *** electrolytes are ubiquitously employed in cells to ensure sufficient redox kinetics and preclude the interference of the electrolyte depletion due to side reactions with the lithium metal *** strategy is capable of enabling long-lasting,high-capacity and excellent-rate battery performances,but it mask the requirements of practical Li-S batteries,where high-sulfur-loading/content and lean electrolyte are prerequisite to realize the energy-dense Li-S *** and highly solvating electrolytes have emerged as effective yet simple approaches to decrease the electrolyte/sulfur ratio through altering sulfur species and exerting new reaction *** solvating electrolytes are characterized by few free solvents to solvate lithium polysulfides,rendering a quasi-solid sulfur conversion and decoupling the reaction mechanisms from electrolyte quantity used in cells;while highly solvating electrolytes adopt highdonicity or high-permittivity solvents and take their advantages of strong solvation ability toward polysulfide intermediates,thereby favoring the polysulfide formation and stabilizing unique radicals,which subsequently accelerate redox *** solvation chemistry approaches have their respective features to allow the operation of cells under electrolyte-starved *** Review discusses their unique features and basic physicochemical properties in the working Li-S batteries,presents remaining technical and scientific issues and provides future directions for the electrolyte chemistry to attain highenergy Li-S batteries.

关键词： Li-S batteries Solvation chemistry Energy density Polysulfides Lean electrolyte

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Combined Applications of Nitrogen and Phosphorus Fertilizers with Manure Increase Maize Yield and Nutrient Uptake via Stimulating Root Growth in a Long-Term Experiment

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Pedosphere 2016年第1期26卷 62-73页

作者： WEN Zhihui SHEN Jianbo Martin BLACKWELL LI Haigang ZHAO Bingqiang yuan huimin College of Resources and Environmental Sciences China Agricultural University Rothamsted Research North Wyke Institute of Agricultural Resources and Regional Planning China Academy of Agricultural Sciences

Imbalanced application of nitrogen(N) and phosphorus(P) fertilizers can result in reduced crop yield,low nutrient use efficiency,and high loss of nutrients and soil nitrate nitrogen(NO_3^--N) accumulation decreases when N is applied with P and/or manure;however,the effect of applications of N with P and/or manure on root growth and distribution in the soil profile is not fully *** aim of this study was to investigate the combined effects of different N and P fertilizer application rates with or without manure on maize(Zea mays L.) yield,N uptake,root growth,apparent N surplus,Olsen-P concentration,and mineral N(N_(min)) accumulation in a fluvo-aquic calcareous soil from a long-term(28-year) *** experiment comprised twelve combinations of chemical N and P fertilizers,either with or without chicken manure,as treatments in four *** yield of maize grain was 82%higher,the N uptake 100%higher,and the N_(min) accumulation 39%lower in the treatments with combined N and P in comparison to N fertilizer *** maize root length density in the 30-60 cm layer was three times greater in the treatments with N and P fertilizers than with N fertilizer *** addition increased maize yield by 50%and N uptake by 43%,and reduced N_(min)(mostly NO_3^--N) accumulation in the soil by 46%.The long-term application of manure and P fertilizer resulted in significant increases in soil Olsen-P concentration when no N fertilizer was *** application reduced the apparent N surplus for all *** results suggest that combined N and P fertilizer applications could enhance maize grain yield and nutrient uptake via stimulating root growth,leading to reduced accumulation of potentially leachable NO_3^--N in soil,and manure application was a practical way to improve degraded soils in China and the rest of the world.

关键词： apparent N surplus degraded soils chemical fertilizers nitrate nitrogen root length density soil mineral N soil Olson-P

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Chemical looping conversion of methane via Fe_(2)O_(3)-LaFeO_(3)calcined from LaFe-MOF precursor

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Chinese Journal of Chemical Engineering 2023年第10期62卷 225-237页

作者： Jitong Deng Yongjun Zhang Xiaopeng Wang Wei Zhang Hongjing Han Haiying Wang huimin yuan Yanan Zhang Yanguang Chen College of Chemistry&Chemical Engineering Northeast Petroleum UniversityDaqing 163318China PetroChina Daqing Petrochemical Research Center Daqing 163714China CNPC Safety and Environmental Technology Research Institute Co.LTD. Beijing 102206China

The effective utilization of natural gas resources is a promising option for the implementation of the"dual carbon"***,the capture of carbon dioxide with relatively lower concentration after the combustion of natural gas is the crucial ***,the lattice oxygen is used for chemical cycle conversion of methane to overcome the shortcomings mentioned above.A method was proposed to synthesize perovskite for methane cycle conversion using metal organic framework as a *** and pore structure of Fe_(2)O_(3)-LaFeO_(3)composite oxides were regulated by precursor synthesis conditions and calcination ***,the chemical looping conversion performance of methane was *** results showed that the pure phase precursor of La[Fe(CN)_(6)]·5H_(2)O was synthesized with the specific surface area of 23.91 m^(2)·g^(-1)under the crystallization of 10 h and the pH value ***_(2)O_(3)-LaFeO_(3)was obtained by controlled calcination of La[Fe(CN)_(6)]·5H_(2)O and Fe_(2)O_(3)with variable mass *** selectivity of CO_(2)can reach more than 99%under the optimal parameters of methane chemical looping conversion:m(Fe_(2)O_(3)):m(LaFeO_(3))=2:1,the reaction temperature is 900℃,the lattice oxygen conversion is less than 40%.Fe_(2)O_(3)-LaFeO_(3)still has good phase and structure stability after five redox reaction and regeneration cycles.

关键词： Composite Chemical looping conversion Carbon dioxide Metal organic frameworks Lattice oxygen Methane

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Highly [010]-oriented self-assembled LiCoPO4/C nanoflakes as high-performance cathode for lithium ion batteries

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Nano Research 2018年第5期11卷 2424-2435页

作者： Yan Hou Kun Chang Bao Li Hongwei Tang Zhenyu Wang Jianli Zou huimin yuan Zhouguang Lu Zhaorong Chang Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan Department of Materials Science & Engineering Southern University of Science and Technology Shenzhen 518055 China

In this artide, highly [010]-oriented self-assembled LiCoPO4/C nanoflakes were prepared through simple and facile solution-phase strategies at low temperature and ambient pressure. The formation of 5-hydroxylmethylfurfural and levoglucosan via the dehydration of glucose during the reaction played a key role in mediating the morphology and structure of the resulting products. LiCoPO4 highly oriented along the （010）-facets exposed Li^＋ ion transport channels, facilitating ultrafast lithium ion transportation. In turn, the unique assembled mesoporous structure and the flake-like morphology of the prepared products benefit lithium ion batteries constructed using two-dimensional （2D） LiCoPO4/C nanoflakes self- assembles as cathodes and commercial Li4Ti5O12 as anodes. The tested batteries provide high capacities of 154.6 mA·h·g^-1 at 0.1 C （based on the LiCoPO4 weight of 1 C = 167 mA·h·g^-1） and stable cycling with 93.1% capacity retention after 100 cycles, which is outstanding compared to other recently developed LiCoPO4 cathodes.

关键词： lithium ion battery lithium cobalt phosphate two-dimensional (2D) nanoflakes (010) oriented assembly solution-phase synthesis

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Rational construction and triethylamine sensing performance of foam shapedα-MoO_(3)@SnS_(2) nanosheets

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Chinese Chemical Letters 2022年第1期33卷 567-572页

作者： Xianhui Dong Qing Han Yaru Kang Haidong Li Xinyu Huang Zhengtao Fang huimin yuan Ahmed A.Elzatahry Zongtao Chi Guanglei Wu Wanfeng Xie School of Material Science&Engineering Institute of Materials for Energy and EnvironmentState Key Laboratory of Bio-Fibers and Eco-TextilesQingdao UniversityQingdao 266071China School of Electronics and Information Qingdao UniversityQingdao 266071China College of Physics and Electronic Engineering Qilu Normal UniversityJi'nan 250200China Materials Science and Technology Program College of Arts and SciencesQatar UniversityPO Box 2713DohaQatar

Owing to their high surface area,stable structure and easy fabrication,composite nanomaterials with encapsulation structures have attracted considerable research interest as sensing materials to detect volatile organic ***,a hydrothermal route is designed to prepare foam shapedα-MoO_(3)@SnS_(2)nanosheets that exhibit excellent sensing performance for triethylamine(TEA).The developed sensor,based onα-MoO_(3)@SnS_(2)nanosheets,displays a high response of 114.9 for 100 ppm TEA at a low working temperature of 175℃with sensitivity higher than many other reported *** addition,the device shows a wide concentration detection range(from 500 ppb to 500 ppm),good stability after exposure to air for 80 days,and excellent *** superior sensing characteristics of the developed sensor are attributed to the high crystallinity ofα-MoO_(3)/SnS_(2),excessive and accessible active sites provided by the good permeability of porous SnS_(2)shells,and the excellent conductivity of the encapsulation heterojunction ***,the foam shapedα-MoO_(3)@SnS_(2)nanosheets presented herein have promising practical applications in TEA gas sensing devices.

关键词： MoO_(3) SnS_(2) Encapsulation heterojunction Triethylamine Sensing performance

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A DUAL RESERVATION CDMA-BASED MAC PROTOCOL WITH POWER CONTROL FOR AD HOC NETWORKS

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Journal of Electronics(China) 2007年第1期24卷 64-68页

作者： Jia Min Chen huimin yuan Yuhua School of Communication and Information Engineering Shanghai University Shanghai 200072 China

This paper proposes a new multi-channel Medium Access Control (MAC) protocol named as Dual Reservation Code Division Multiple Access (CDMA) based MAC protocol with Power Control (DRCPC). The code channel is divided into common channel,broadcast channel and several data chan-nels. And dynamic power control mechanism is implemented to reduce near-far interference. Compared with IEEE 802.11 Distributed Coordination Function (DCF) protocol,the results show that the pro-posed mechanism improves the average throughput and limits the transmission delay efficiently.

关键词： Ad hoc networks Medium Access Control (MAC) protocol multichannel Code Division Multiple Access (CDMA) Power control

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Danggui Shaoyao powder improves hepatic lipid metabolism in atherosclerosis mice via PPARγ-LXRα-ABCA1 pathway regulation

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Journal of Traditional Chinese Medical Sciences 2024年第2期11卷 199-206页

作者： Xue Pian Yang Tang Yuemeng Sun Yuhan Sheng Shuxin Yan huimin yuan Yan Sun Jian Cui Yuhang Li School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing102488China School of Traditional Chinese Medicine Inner Mongolia Medical UniversityHohhot010110China Columbia University Irving Medical Center New YorkNY 10032USA

Objective:To observe the effects of Danggui Shaoyao powder(DSP)on hepatic lipid metabolism and further explore its mechanism of action by peroxisome proliferator-activated receptor(PPARγ)-liver X receptor(LXRα)-adenosine triphosphate(ATP)-binding cassette transporter A1(ABCA1)pathway ***: Eight C57BL/6J male mice were selected as the control group,and 24 ApoE^(−/−)male mice were randomly divided into the atherosclerosis model(AS)group,atorvastatin calcium(AC)group,and DSP group(n=8 each group).To establish an AS model,ApoE^(−/−)mice were fed a high-fat diet for 16 *** changes in the aortic vasculature and liver were identified using Oil Red O ***(TG),cholesterol(TC),and low-density lipoprotein cholesterol(LDL-C)levels were determined in the livers using a single-reagent GPO-PAP *** quantitative polymerase chain reaction and western blot were used to observe and evaluate the mRNA and protein expression of the PPARγ-LXRα-ABCA1 intermediates in the ***: After 16 weeks of a high-fat diet,ApoE^(−/−)mice showed more Oil Red O staining in the aorta and liver compared to the CONT *** to the AS group,the DSP and AC treatment reduced aortic plaque and hepatic lipid deposition to varying ***,DSP significantly reduced the hepatic lipid area in ApoE^(−/−)mice(P<.001)and decreased the levels of TG,TC,and LDL-C in liver(P<.001,P=.027,P<.001,respectively).DSP also significantly increased the levels of PPARγ,LXRα,ABCA1,and ABCG1 mRNA expression,as well as the PPARγ,LXRα,ABCA1,and ABCG1 protein expression in ***: DSP improved hepatic lipid metabolism via PPARγ-LXRα-ABCA1 pathway modulation for AS treatment.

关键词： Danggui Shaoyao powder Atherosclerosis PPARγ-LXRα-ABCA1 pathway Reverse cholesterol transport

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Intervention of the Mahuang Lianqiao Chixiaodou decoction on immune imbalance in atopic dermatitis-like model mice

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Journal of Traditional Chinese Medical Sciences 2022年第4期9卷 392-399页

作者： huimin yuan Yan Sun Yang Tang Yuxin Zhang Shuangqiao Liu Jingang Liu Shujing Zhang Yushan Gao Jing Feng Fengjie Zheng School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing102488China

Objective:To explore the potential mechanism of intervention on the immune imbalance of atopic dermatitis(AD) by studying the effects of Mahuang Lianqiao Chixiaodou decoction(MLCD) on skin damage and inflammation factors in an AD-like mouse ***:Ninety-six male BALB/c mice were divided into normal,model,positive control(mometasone furoate),and traditional Chinese medicine treatment(MLCD) groups by a random number table.2,4-dinitrofluorobenzene was used to induce AD-like mice in all groups except the normal *** treatment or intervention was administered for seven consecutive days on days 4,18,32,and *** mRNA relative expressions of interleukin-4(IL-4),IL-10,interferon-γ(IFN-γ),thymic stromal lymphopoietin(TSLP),and the TSLP receptor(TSLPR) were measured using quantitative real-time polymerase chain reaction,and the serum immunoglobulin E,IL-4,IL-10,and IFN-γ levels were detected using enzyme-linked immunosorbent ***:Compared with the normal group,the hematoxylin-eosin staining of the skin lesions of the mice in the model group was significantly thickened on days 11,25,and *** with the model group,the epidermal thickness of the positive control group was significantly alleviated on day 39(P <.001),and that of the MLCD group was significantly improved on days 25 and 39(P <.001).Compared with the four observation time points,MLCD had the best treatment effect on day 39 of the experiment and significantly improved the skin damage performance and relieved pathological *** day 39,compared with the model group,MLCD downregulated the skin mRNA relative expressions of IL-4(P=.009),TSLP(P=.030),and TSLPR(P <.001),and reduced the mouse serum levels of IL-4(P=.003).For other serum indicators,no significant difference was observed between the model and MLCD ***:MLCD improved AD-like mice skin damage by regulating the Th1/Th2 immune imbalance.

关键词： Atopic dermatitis Mahuang Lianqiao Chixiaodou decoction Immune imbalance Inflammation factors

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Mechanism of improving skin barrier function in a mouse model of atopic dermatitis using Mahuang Lianqiao Chixiaodou decoction and its disassembled formula

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Journal of Traditional Chinese Medical Sciences 2021年第4期8卷 309-316页

作者： Jingang Liu Yan Sun huimin yuan Yuda Li Jing Feng Yushan Gao Yang Tang Shujing Zhang Hang Wang Fengjie Zheng School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing102488China

Objective: To reveal the mechanism of Mahuang Lianqiao Chixiaodou decoction and its disassembled formula for improving the skin barrier function in a mouse model of atopic dermatitis(AD).Methods: Sixty specific-pathogen free male BALB/c mice were randomly divided into the control group,model group, whole formula group(WF), exterior-releasing formula group(ERF), interior-clearing formula group(ICF), and positive control group(PC). A mouse model of AD was established using the semiantigen 2,4-dinitrofluorobenzene induction method. The lesion scores, transepidermal water loss and p H, and skin histopathology of mice in each group were observed. The expressions of filaggrin, loricrin,and involucrin were detected by the streptavidin peroxidase immunohistochemical method and western blotting, and their mRNA expressions were detected by quantitative polymerase chain ***: Mice in the WF, ERF, ICF, and PC groups showed reduced skin lesion performance, improved histopathology, decreased skin lesion score, transepidermal water loss and pH, and upregulated expressions of proteins including filaggrin, loricrin, and involucrin, and their mRNAs. The most obvious regulatory effect was observed in the WF group, followed by the ICF, ERF, and PC groups, ***: Mahuang Lianqiao Chixiaodou decoction and its disassembled formula can improve the skin barrier function in a mouse model of AD by upregulating filaggrin, loricrin, and involucrin, and their mRNA expressions, and the most optimal effect was noted in the WF group, followed by the ICF and ERF groups, which suggests that the effect of clearing heat and resolving dampness in improving the skin barrier function of AD is more obvious and is one of the key treatments for AD.

关键词： Atopic dermatitis Mahuang Lianqiao Chixiaodou decoction Correspondence between pattern and formula elements Skin barrier

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Research and Application of Rainstorm Disaster Risk Assessment along the Middle and Lower Reaches of Yangtze River

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Meteorological and Environmental Research 2014年第10期5卷 38-44页

作者： yuan huimin Wang Xiurong Zhang Min Sun Yonggang Meng Xuefeng Inner Mongolia Meteorological Observatory National Meteorological Center

We explored and studied rainstorm disaster impact grade. Firstly,we selected average precipitation,precipitation intensity,coverage and duration during rainstorm process,and economic losses,the number of deaths and total casualties in rainstorm disaster situation as the pre-assessment indexes of rainstorm process impact grade along the middle and lower reaches of Yangtze River. Then,normalized and dimensionless processing of each index was conducted. By using gray correlation method,we established rainstorm process grade and rainstorm disaster impact grade. At last,we conducted regression analysis of relevancy degree between rainstorm process grade and rainstorm disaster situation grade,and established a linear relationship between the two,thereby getting a rainstorm disaster pre-assessment method. On this basis,using rainstorm hazard factors in independent sample,we carried out pre-assessment test of disaster impact grade. The results show that this pre-assessment method is quick and easy,and the effect is better.

关键词： The middle and lower reaches of Yangtze River Rainstorm disaster Risk assessment Gray correlation China

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