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SbVO4 based high capacity potassium anode:a combination of conversion and alloying reactions

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Science China Chemistry 2021年第2期64卷 238-244页

作者： xianhui yi Junmin Ge Jiawan Zhou Jiang Zhou Bingan Lu Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China School of Materials Science and Engineering Central South UniversityChangsha 410083China

As the key to optimizing potassium ion batteries’(PIBs)performance,the development of high capacity potassium anode is the ***,through a one-step solvothermal method,uniformly dispersed SbVO4 nanoparticles on the reduced graphene oxide nanosheets(SbVO4@RGO)were synthesized and used as PIBs ***4@RGO anode shows high capacity due to alloying and conversion reactions occur simultaneously in the cyclic *** anode delivers a capacity as high as 447.9 mAh g^-1 at 100 mA g^-***,a cycling life of 500 cycles with small average capacity decay rate(only 0.106%per cycle)is also *** was found in the initial discharge process,SbVO4 transforms into Sb and *** in the following cycle Sb and K3VO4 simultaneously react with K+via the alloying/de-alloying and conversion reaction,*** present study of SbVO4@RGO may provide insight for high performance alloying-based/conversion-based potassium anodes.

关键词： potassium-ion batteries SbVO4@RGO anode alloying conversion

Trimming the Degrees of Freedom via a K^(+) Flux Rectifier for Safe and Long‑Life Potassium‑Ion Batteries

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Nano-Micro Letters 2023年第11期15卷 157-171页

作者： xianhui yi Apparao MRao Jiang Zhou Bingan Lu School of Physics and Electronics Hunan UniversityChangsha 410082People’s Republic of China Department of Physics and Astronomy Clemson Nanomaterials InstituteClemson UniversityClemsonSC 29634USA School of Materials Science and Engineering Central South UniversityChangsha 410083People’s Republic of China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082People’s Republic of China

High degrees of freedom(DOF)for K^(+)movement in the electrolytes is desirable,because the resulting high ionic conductivity helps improve potassium-ion batteries,yet requiring support from highly free and flammable organic solvent molecules,seriously affecting battery ***,we develop a K^(+)flux rectifier to trim K ion’s DOF to 1 and improve electrochemical *** the ionic conductivity is compromised in the K^(+)flux rectifier,the overall electrochemical performance of PIBs was *** oxidation stability improvement from 4.0 to 5.9 V was realized,and the formation of dendrites and the dissolution of organic cathodes were ***,the K||K cells continuously cycled over 3,700 h;K||Cu cells operated stably over 800 cycles with the Coulombic efficiency exceeding 99%;and K||graphite cells exhibited high-capacity retention over 74.7%after 1,500 ***,the 3,4,9,10-perylenetetracarboxylic diimide organic cathodes operated for more than 2,100 cycles and reached year-scale-cycling *** fabricated a 2.18 Ah pouch cell with no significant capacity fading observed after 100 cycles.

关键词： Electrolytes Degrees of freedom Safe Coulombic efficiency Potassium-ion batteries

Co-activation for enhanced K-ion storage in battery anodes

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National Science Review 2023年第7期10卷 183-195页

作者： Yanhong Feng Yawei Lv Hongwei Fu Mihir Parekh Apparao M.Rao He Wang Xiaolin Tai xianhui yi Yue Lin Jiang Zhou Bingan Lu School of Physics and Electronics Hunan University Department of Physics and Astronomy Clemson Nanomaterials Institute Clemson University Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China School of Materials Science and Engineering Central South University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University

The relative natural abundance of potassium and potentially high energy density has established potassium-ion batteries as a promising technology for future large-scale global energy ***,the anodes’ low capacity and high dis charge platform lead to low energy density,which impedes their rapid ***,we present a possible co-activation mechanism between bismuth(Bi) and tin(Sn)that enhances K-ion storage in battery *** co-activated Bi-Sn anode delivered a high capacity of634 mAh g-1,with a discharge plateau as low as 0.35 V,and operated continuously for 500 cycles at a current density of 50 mA g-1,with a high Coulombic efficiency of 99.2%.This possible co-activation strategy for high potassium storage may be extended to other Na/Zn/Ca/Mg/Al ion battery technologies,thus providing insights into how to improve their energy storage ability.

关键词： potassium ion batteries anode co-activation high reversible capacity

湖南省棉花品种区域试验2014年QA组简报

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棉花科学 2015年第3期37卷 46-48,55页

作者：易先辉湖南省棉花科学研究所湖南常德415101

为了筛选适宜洞庭湖棉区种植品种和为湖南省棉花品种审定与推广提供科学依据,通过对湖南省2014年棉花品种区域试验QA组的参试品种(系)进行分析结果表明,续试品种(系)YL-027、A212、C11-4、绿亿棉6号、H-28和湘X109完成试验,其中,YL-027... 详细信息

为了筛选适宜洞庭湖棉区种植品种和为湖南省棉花品种审定与推广提供科学依据,通过对湖南省2014年棉花品种区域试验QA组的参试品种(系)进行分析结果表明,续试品种(系)YL-027、A212、C11-4、绿亿棉6号、H-28和湘X109完成试验,其中,YL-027、A212和绿亿棉6号的产量高且品质较好,予以推荐审定;初试品种(系)楚杂1028、ZZS-1和XP502停止试验。

关键词：棉花区域试验产量品质

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氯诺昔康注射液椎管内给药对家兔脊髓的影响

现代中西医结合杂志 2013年第5期22卷 474-476页

作者：胡玲易先慧武汉科技大学附属天佑医院湖北武汉430060 湖北省宜昌市三峡仁和医院湖北宜昌443000

目的探讨氯诺昔康椎管内给药对家兔的镇痛效果及不良反应。方法选择健康成年大白兔24只,随机分成A组、B组和C组各8只,A组和B组均行硬膜外置管。A组从硬膜外腔缓慢给生理盐水2 mL,B组给氯诺昔康0.75 mg/kg(共2 mL),C组静脉给氯诺昔康0.75... 详细信息

目的探讨氯诺昔康椎管内给药对家兔的镇痛效果及不良反应。方法选择健康成年大白兔24只,随机分成A组、B组和C组各8只,A组和B组均行硬膜外置管。A组从硬膜外腔缓慢给生理盐水2 mL,B组给氯诺昔康0.75 mg/kg(共2 mL),C组静脉给氯诺昔康0.75 mg/kg(共2 mL)。给药5 min和术后12 min分别观察家兔对热敏度的耐受情况并记录耐受时间t1和t2。实验完毕后处死兔子取出脊髓标本并观察受损情况。结果与A组比较,B组和C组耐受时间延长(P均<0.05);C组与B组耐受时间比较亦有显著性差异(P<0.05);C组t2较t1延长,有显著性差异(P<0.05);A、C 2组兔脊髓切片内未见损害性改变,B组绝大部分切片均可见神经元细胞变性等损害性改变。结论氯诺昔康对痛觉过敏状态有良好的镇痛效应,但椎管内给药后对脊髓有一定的损害作用,故不适合硬膜外腔给药。

关键词：氯诺昔康椎管内给药脊髓

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洞庭湖区宜机收夏玉米品种的筛选

湖南农业大学学报（自然科学版） 2018年第3期44卷 229-233页

作者：朱春生易先辉肖才升马杰罗红兵湖南省旱粮产业技术体系环洞庭湖区试试验站湖南常德415101 湖南省玉米工程技术研究中心湖南长沙410128

2016年,以7个夏玉米品种(百农5号、福单2号、丰玉8号、大丰28、新中玉801、福单4号、三北89)为材料,测定干物质积累量、灌浆速率、籽粒脱水速率,并在收获期进行机械化收获特性调查。结果表明:玉米干物质积累优势期为生育中期和后期,早... 详细信息

2016年,以7个夏玉米品种(百农5号、福单2号、丰玉8号、大丰28、新中玉801、福单4号、三北89)为材料,测定干物质积累量、灌浆速率、籽粒脱水速率,并在收获期进行机械化收获特性调查。结果表明:玉米干物质积累优势期为生育中期和后期,早熟品种丰玉8号、大丰28的单株干物质积累量分别为282、285 g,低于中迟熟品种的单株积累量;供试玉米籽粒的灌浆速率基本一致,在授粉后15 d左右达到高峰,随后逐渐降低;籽粒含水率均高于27%;机收籽粒破碎率均未达到1%的标准;除大丰28外,机收总损失率均低于5%;机收秸秆切碎长度合格率均高于93%,符合行业标准。综合分析,福单2号、百农5号产量分别为6 432、6 342 kg/hm^2,收获时籽粒破损率低,茎秆坚韧抗倒,基本达到机收籽粒的要求,宜于在洞庭湖区作机收品种栽培。

关键词：玉米机械化收获特性农艺性状洞庭湖区

某写字楼小型会议室夏季置换通风形式下空调气流组织及人体舒适性研究

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制冷 2024年第1期43卷 86-90页

作者：王志强易显辉珠海格力电器股份有限公司

温度和风速的均匀性是影响置换通风性能的重要因素,利用计算流体力学的方法,通过Fluent软件分析了送风口(排风口)间距、送风风速和送风温度对通风性能的影响;结果显示:空间内四周壁面存在通风死角和热量聚集的现象,送风口(排风口)的间... 详细信息

温度和风速的均匀性是影响置换通风性能的重要因素,利用计算流体力学的方法,通过Fluent软件分析了送风口(排风口)间距、送风风速和送风温度对通风性能的影响;结果显示:空间内四周壁面存在通风死角和热量聚集的现象,送风口(排风口)的间距设计不小于0.7 m较为合理,送风口(排风口)面积越大,温度和风速场越均匀,送风温度为21℃左右,室内的环境越接近人体舒适区的温度;研究结论具有为小型会议室空调通风系统的设计提供借鉴和参考的工程意义。

关键词：置换通风 Fluent软件温度风速均匀性

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Inhibitory Effects of Berberine on the Activation and Cell Cycle Progression of Human Peripheral Lymphocytes

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Cellular & Molecular Immunology 2005年第4期2卷 295-300页

作者： Lihui Xu yi Liu xianhui He Key Laboratory of Ministry of Education for Tissue Transplantation and Immunology College of Life Science and Technology Jinan University Guangzhou 510632 China Institute of Bioengineering Jinan University Guangzhou 510632 China Department of Dermatopathology Institute of Dermatology Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing 210042 China

The immunosuppressive property of berberine, an isoquinoline alkaloid, has been well documented, but the mechanism of its action on lymphocytes has not been completely elucidated. The present study is to investigate the effect of berberine on the activation and proliferation of lymphocytes, in particular T lymphocytes. Whole peripheral blood from healthy donors was stimulated with phytohemagglutinin （PHA） alone or phorbol dibutyrate （PDB） plus ionomycin, and the expression of CD69 and CD25 on T lymphocytes was evaluated with flow cytometry. The distribution of cell cycles and cell viability were analyzed by staining with propidium iodide （PI） and 7-aminoactinomycin D （7-AAD）, respectively. The results showed that 100 μmol/L and 50 μmol/L of berberine significantly inhibited CD69 expression on T cells stimulated with PDB plus ionomycin or PHA, whereas the effect of 25 μmol/L berberine was not significant. As the incubation time increased, the extent of inhibition decreased. Similarly, the expression of CD25 was also reduced by berberine in a dose-dependent manner over the concentration range of 25-100 μmol/L. Besides, this alkaloid could block lymphocyte cell cycle progression from G0/G1 phase to S and G2/M phase without phase specificity. Moreover, analysis following 7-AAD staining revealed that berberine had no significant cytotoxicity on lymphocytes. Taken together, berberine significantly inhibits the expression of activation antigens on T lymphocytes and also blocks the progression of cell cycles of lymphocytes, suggesting that berberine may exert immunosuppressive effect through inhibiting the activation and proliferation of T cells.

关键词： berberine lymphocyte activation antigen cell cycle

Expression and Purification of Soluble Human Programmed Death-1 in Escherichia coli

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Cellular & Molecular Immunology 2006年第2期3卷 139-143页

作者： Lihui Xu yi Liu xianhui He Institute of Bioengineering College ot Life Science and lecnnology Jinan University Guangzhou 510632 China Institute of Tissue Transplantation and Immunology College of Life Science and Technology Jinan University Guangzhou 510632 China Department of Dermatopathology Institute of Dermatology Chinese Academy of Medical Sciences and Peking Union Medical College Nanjing 210042 China

Programmed death-1 （PD-1）, a member of CD28 family, is able to negatively regulate the TCR complex-initiated signaling by interacting with its cognate ligands （PD-L1 and/or PD-L2）. PD-1/PD-L1 pathway plays an important role in down-regulating the effective phase of adaptive immune responses and the blockade of this pathway has been proved to enhance antiviral and antitumoral immunity, suggesting that it might be a potential target for the development of therapies to improve T cell responses in patients with virus infections or malignancies. In present study, the extracellular domain of human PD-1 with a carboxyl terminal His-tag （designated as sPD-1） was expressed as inclusion bodies in Escherichia coll. The product was on-column refolded, purified by immobilized metal affinity chromatography, and characterized by Western blotting. Furthermore, the soluble PD-1 with high purity possessed specific binding activity with its cognate ligand PD-L1, and the dissociation constant was 0.43 nmol/L as determined by Scatchard plot analysis. These results suggest that refolded sPD-1 from prokaryotic cells may be of therapeutic interest in enhancing antivirus and antitumoral immune responses.

关键词： PD-1 extracellular domain prokaryotic expression inclusion body binding activity