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Quantitative defect regulation of heterostructures for sulfur catalysis toward fast and long lifespan lithium-sulfur batteries

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Nano Research 2022年第9期15卷 7925-7932页

作者： Saisai Qiu xinqi liang Shuwen Niu Qingguo Chen Gongming Wang Minghua Chen Key Laboratory of Engineering Dielectric and Applications(Ministry of Education) School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbin 150080China Hefei National Laboratory for Physical Science at the Microscale Department of ChemistryUniversity of Science&Technology of ChinaHefei 230026China

The advancement of lithium-sulfur(Li-S)batteries is severely retarded by lithium polysulfides(LiPSs)shuttling behavior and sluggish redox ***,the heterogeneous composite with defective Bi_(2)Se_(3−x)nanosheets and porous nitrogen-doped carbon(Bi_(2)Se_(3−x)/NC)is prepared by selenizing bismuth metal-organic frameworks as a multifunctional sulfur *** highly efficient immobilization-conversion on LiPSs is realized by the synergistic effect of structure construction strategy and defect *** is found that Bi_(2)Se_(3−x)with the suitable amount of selenium vacancies achieves the best electrochemical performance due to the advantages of its structure and *** results confirm the intrinsic correlation between defects and catalysis,which are revealed by computational and experimental *** to these superiorities,the developed sulfur electrodes exhibited admirable stability and a fairly lower capacity decay rate of approximately 0.0278%per cycle over 1,000 cycles at a 3 C *** at the high sulfur loading of 6.2 mg·cm^(−2),the cathode still demonstrates a high discharge capacity of 455 mAh·g^(−1)at 1 *** work may enlighten the development of mechanism investigation and design principles regarding sulfur catalysis toward high-performance Li-S batteries.

关键词： lithium-sulfur(Li-S)batteries lithium polysulfides(LiPSs) shuttle effect redox kinetics selenium vacancy sulfur catalysis

Liquid-source plasma technology for construction of dual bromine-fluorine-enriched interphases on lithium metal anodes with enhanced performance

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Journal of Materials Science & Technology 2024年第10期177卷 68-78页

作者： Ping Liu Zhong Qiu Feng Cao Yongqi Zhang Xinping He Shenghui Shen xinqi liang Minghua Chen Chen Wang Wangjun Wan Yang Xia Xinhui Xia Wenkui Zhang Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313002China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China School of Materials Science&Engineering Zhejiang UniversityHangzhou 310027China Department of Engineering Technology Huzhou CollegeHuzhou 313000China Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 611371China School of Materials Science&Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory of Engineering Dielectric and Applications(Ministry of Education) School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbin 150080China Zhejiang Academy of Science and Technology for Inspection&Quarantine Zhejiang Hangzhou 311215China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350116China

The electrochemical performance of Li metal anode is closely bound up with the interphase between Li and lithium-loaded skeleton as well as solid electrolyte interphase(SEI)on Li ***,for the first time,we propose a novel liquid-source CHBr_(2)F plasma technology to simultaneously construct dual bromine-fluorine-enriched interphases:NiBr_(2)-NiF_(2) interphase on sponge Ni(SN)skeleton and LiBr-LiF-enriched SEI on Li anode,*** on density functional theory(DFT)calculations and COMSOL multiphysics simulation results,SN skeleton with NiBr_(2)-NiF_(2)interphase can effectively decrease the local current density with good *** the LiBr-LiF-enriched SEI on Li surface can function to block electron tunneling and hinder side electrochemical reduction of electrolyte components,thus suppressing the growth of dendrite and facilitating the homogeneous transportation of lithium ***,the Li/SN electrodes with modified interphases show remarkable stability with a low overpotential of 22.6 mV over 1800 h at 1 mA cm^(-2)/1 mAh cm^(-2)and an exceptional average Coulombic efficiency of 99.6%.When coupled with LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)cathode,the full cells deliver improved cycling stability with a capacity retention of 79.5%even after 350 cycles at 0.5 *** study provides a facile and new plasma method for the construction of advanced Li anodes for energy storage.

关键词： Plasma Solid electrolyte interphase LiBr LiF Lithium metal anodes

One-step constructing advanced N-doped carbon@metal nitride as ultra-stable electrocatalysts via urea plasma under room temperature

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Chinese Chemical Letters 2024年第11期35卷 486-491页

作者： Tao Tang Chen Li Sipu Li Zhong Qiu Tianqi Yang Beirong Ye Shaojun Shi Chunyang Wu Feng Cao Xinhui Xia Minghua Chen xinqi liang Xinping He Xin Liu Yongqi Zhang Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 611731China Department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China College of Materials Science&Engineering Zhejiang University of TechnologyHangzhou 310014China School of Chemistry and Materials Engineering Changshu Institute of TechnologyChangshu 215500China State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 611731China Department of Engineering Technology Huzhou CollegeHuzhou 313000China Key Laboratory of Engineering Dielectric and Applications(Ministry of Education) School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbin 150080China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350116China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

Highly active transition metal nitrides are desirable for electrocatalytic reactions,but their long-term stability is still unsatisfactory and thus limiting commercial ***,for the first time,we report a unique and universal room-temperature urea plasma method for controllable synthesis of N-doped carbon coated metal(Fe,Co,Ni,etc.)nitrides arrays *** preformed metal oxides arrays can be successfully converted into metal nitrides arrays with preserved nanostructures and a thin layer of N-doped carbon(N-C)via one-step urea ***,as a representative case,N-C@CoN nanowire arrays are illustrated and corresponding formation mechanism by plasma is ***,the designed N-C@Co N catalysts deliver excellent electrocatalytic activity and long-term stability both in oxygen evolution reaction(OER)and urea oxidation reaction(UOR).For OER,a low overpotential(264 mV at 10 mA/cm^(2))and high stability(>50 h at 20 mA/cm^(2))are *** UOR,a current density of100 m A/cm^(2) is achieved at only 1.39 V and maintain over 100 *** calculations reveal that the synergetic coupling effect of CoN and N-C can significantly facilitate the charge-transfer process,optimize adsorbed intermediates binding strength and further greatly decrease the energy *** strategy provides a novel method for fabrication of N-C@metal nitrides as highly active and stable catalysts.

关键词： Urea plasma Metal nitrides Carbon shell Oxygen evolution reaction Urea oxidation reaction

Plasma enhanced reduction method for synthesis of reduced graphene oxide fiber/Si anode with improved performance

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Chinese Chemical Letters 2024年第11期35卷 505-511页

作者： Yihong Li Zhong Qiu Lei Huang Shenghui Shen Ping Liu Haomiao Zhang Feng Cao Xinping He Jun Zhang Yang Xia xinqi liang Chen Wang Wangjun Wan Yongqi Zhang Minghua Chen Wenkui Zhang Hui Huang Yongping Gan Xinhui Xia School of Materials Science&Engineering Zhejiang UniversityHangzhou 310027China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China School of Materials Science and&Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Engineering Technology Huzhou CollegeHuzhou 313000China Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 611371China Key Laboratory of Engineering Dielectric and Applications(Ministry of Education) School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbin 150080China Zhejiang Academy of Science and Technology for Inspection&Quarantine Hangzhou 311215China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350116China

Silicon(Si)is considered as one of the most promising anode materials for advanced lithium-ion batteries due to its high theoretical capacity,environmental friendliness,and widespread ***,great challenges such as volumetric expansion,limited ionic/electronic conductivity properties and complex manufacturing processes hinder its practical ***,a novel plasma-enhanced reduced graphene oxide fibers/Si(PrGOFs/Si)composite anode is first proposed by using wet-spinning technology followed by plasma-enhanced reduction *** PrGOFs provide large space to accommodate the volume expansion of Si nanoparticles(SiNPs)by forming a flexible 3D conductive *** to the conventional thermally reduced graphene oxide fibers/Si(TrGOFs/Si)sample,the PrGOFs/Si anodes demonstrate higher conductivity,specific surface area,and superior fabrication ***,the Pr GOFs/Si anodes exhibit a reversible capacity of 698.3 mA h/g,and maintain a specific capacity of 602.5m Ah/g at a current density of 200 m A/g after 100 cycles,superior to conventional Tr GOFs/Si *** research presents a novel strategy for the preparation of high-performance Si/carbon anodes for energy storage applications.

关键词： Li ion batteries Si anode Plasma Graphene fibers Carbon

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雾化网格在果树植保喷雾中的应用与试验

农业工程学报 2022年第18期38卷 1-10页

作者：薛秀云杨振宇梁馨琪罗钦吕石磊李震华南农业大学电子工程学院广州510642 国家柑橘产业技术体系机械研究室广州510642 农业农村部华南热带智慧农业技术重点实验室广州510642 梅州市华农大振声现代农业装备研究院梅州514781

针对目前一些植保机械在喷洒农药的过程中难以兼顾低飘移和高沉积的问题,该研究将雾化网格应用在果树植保喷雾作业中,使喷头喷出的大粒径雾滴在接近靶标处撞击网格二次雾化为小雾滴。为了研究雾滴撞击网格后的粒径和速度分布以及沉积特... 详细信息

针对目前一些植保机械在喷洒农药的过程中难以兼顾低飘移和高沉积的问题,该研究将雾化网格应用在果树植保喷雾作业中,使喷头喷出的大粒径雾滴在接近靶标处撞击网格二次雾化为小雾滴。为了研究雾滴撞击网格后的粒径和速度分布以及沉积特性,以网格孔径、喷头与网格的距离为变量,以二次雾化后雾滴的速度和粒径分布、喷雾角、雾滴覆盖率、沉积量和飘移量为指标进行试验研究。试验结果表明:放置孔径为461、350和227μm网格时测量点的雾滴平均速度比没有网格时的2.35 m/s分别降低23.40%、13.90%、29.00%,最大平均粒径比没有网格情况下的192.5μm分别降低19.5%、14%、10%;随着网格孔径的减小,二次雾化后雾滴的喷雾角有逐渐降低的趋势;放置350和227μm孔径网格时果树冠层各层内沉积均匀性相近,沉积量变异系数最高分别为88.08%和74.22%,远低于461μm孔径网格的162.98%;放置350μm孔径网格时雾滴穿透性较好,各层之间沉积量变异系数最高为10.08%,低于461和227μm孔径网格的44.09%和18.25%。在该研究试验条件下,350μm孔径网格的沉积效果优于461和227μm孔径网格,喷头与网格的距离对雾滴覆盖率和沉积量没有显著影响,使用雾化网格的雾滴飘移较少,非靶标区平均雾滴飘移量为靶标区沉积量的7.58%。研究结果可为果园无人机喷雾作业优化提供参考。

关键词：喷雾 UAV 雾滴破碎金属丝网覆盖率沉积量

复合调凝组分对硫铝酸盐水泥性能的影响及机理

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材料导报 2015年第10期29卷 133-136,142页

作者：巴明芳梁新奇卢梦洁柳俊哲宁波大学建筑工程与环境学院宁波315211

为了有效控制硫铝酸盐水泥(SAC)的凝结时间,研究了硼砂、葡萄糖酸钠、柠檬酸钠单掺和复掺对硫铝酸盐水泥凝结时间和流动性能的影响。结果表明:葡萄糖酸钠与柠檬酸钠以一定质量比复合后可以有效控制水泥浆体的凝结时间,并很好地改善其工... 详细信息

为了有效控制硫铝酸盐水泥(SAC)的凝结时间,研究了硼砂、葡萄糖酸钠、柠檬酸钠单掺和复掺对硫铝酸盐水泥凝结时间和流动性能的影响。结果表明:葡萄糖酸钠与柠檬酸钠以一定质量比复合后可以有效控制水泥浆体的凝结时间,并很好地改善其工作性能和早期强度,而且葡萄糖酸钠与柠檬酸钠复合质量比为5∶1时对硫铝酸盐水泥的缓凝效果最好。水化早期浆体的XRD和SEM分析结果表明,复合调凝组分的加入减缓了钙矾石的生成,并且使得水化产物中CSH凝结的生成数量增多,从而有效抑制了硫铝酸盐水泥的水化速度,并改善了其工作性能。

关键词：复合调凝组分硫铝酸盐水泥(SAC) 初凝时间水化产物微观测试

某电厂1000 MW汽机基础动力参数优化设计研究

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噪声与振动控制 2024年第5期44卷 244-249,272页

作者：杨程胡明祎王进沛汪志昊梁新奇华北水利水电大学土木与交通学院郑州450045 国机集团科学技术研究院有限公司国机集团工程振动控制技术研究中心北京100080

以某电厂2×1000 MW汽轮发电机组为工程背景,开展汽机基础动力参数优化设计研究。针对汽机转子动力响应过大而不利于汽机正常工作的问题,采用ANSYS软件建立汽机基础结构整体有限元模型,依次开展汽机基础动力特性和强迫振动响应分析,分... 详细信息

以某电厂2×1000 MW汽轮发电机组为工程背景,开展汽机基础动力参数优化设计研究。针对汽机转子动力响应过大而不利于汽机正常工作的问题,采用ANSYS软件建立汽机基础结构整体有限元模型,依次开展汽机基础动力特性和强迫振动响应分析,分别讨论增加短柱、短柱宽度和L型梁高度对汽机基础动力响应产生的影响。结果表明:在汽机基础有限元建模中可采用增加附加质量及刚域的方式模拟转子和静子的刚度、质量贡献;分别增设梁间短柱和增加横梁高度,能够有效降低转子动力响应;研究结果可为汽机基础精细化建模与降低汽机转子振动响应提供参考。

关键词：振动与波汽机动力参数动力特性附加质量刚域精细化建模

淡水、半咸水养殖凡纳滨对虾部分生物学特性的比较

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饲料工业 2023年第20期44卷 35-42页

作者：高玉倩王洋杨广李佳昕梁新琪白东清天津农学院水产学院天津市水产生态及养殖重点实验室天津300384

试验选取了淡水和半咸水两种盐度下的凡纳滨对虾(Litopenaeus vannamei)各100尾,运用了形态特征测量、肌肉营养成分测定、生理生化指标测定、肌肉质构分析和组织学观察等方法进行其分析比较。结果表明:淡水、半咸水养殖的凡纳滨对虾的... 详细信息

试验选取了淡水和半咸水两种盐度下的凡纳滨对虾(Litopenaeus vannamei)各100尾,运用了形态特征测量、肌肉营养成分测定、生理生化指标测定、肌肉质构分析和组织学观察等方法进行其分析比较。结果表明:淡水、半咸水养殖的凡纳滨对虾的形态差异主要集中在头胸甲、腹部、额角和步足。半咸水虾肌肉中粗蛋白和粗灰分含量显著高于淡水虾(P0.05)。半咸水虾肌肉硬度是淡水虾1.59倍(P0.05);半咸水虾肝胰腺、血清中总蛋白(TP)含量均显著高于淡水虾(P<0.05);半咸水虾肝胰腺中超氧化物歧化酶(SOD)活性是淡水虾的1.31倍(P<0.05),淡水虾肝胰腺中过氧化氢酶(CAT)活性是半咸水虾的1.35倍,丙二醛(MDA)含量是半咸水虾的1.19倍(P<0.05)。淡水虾脂肪酶(LPS)活性是半咸水虾的1.10倍(P<0.01)。淡水虾的肌纤维直径是半咸水虾的16.71%(P<0.05),半咸水虾的肌纤维密度是淡水虾的37.10%(P<0.05),说明半咸水虾的肉质略高于淡水虾的。可见,半咸水环境中的凡纳滨对虾营养价值、口感及健康状况略微优于淡水环境中的凡纳滨对虾。

关键词：凡纳滨对虾形态特征肌肉营养成分生化指标肌肉质构分析肌肉系水力

3种常用药物对鹤顶红金鱼幼鱼的急性毒性研究

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现代农业科技 2024年第8期 151-154页

作者：梁新琪李佳昕国洺达天津农学院天津市水产生态及养殖重点实验室天津300384

为研究高锰酸钾、亚甲基蓝和硫酸铜对鹤顶红金鱼幼鱼的急性毒性作用,试验选择平均体长为(1.70±0.03)cm、平均体质量为(0.29±0.02)g的鹤顶红金鱼幼鱼作为试验对象,随机分为6组,设置5个不同浓度试验组和1个空白对照。在常温静水的条件下... 详细信息

为研究高锰酸钾、亚甲基蓝和硫酸铜对鹤顶红金鱼幼鱼的急性毒性作用,试验选择平均体长为(1.70±0.03)cm、平均体质量为(0.29±0.02)g的鹤顶红金鱼幼鱼作为试验对象,随机分为6组,设置5个不同浓度试验组和1个空白对照。在常温静水的条件下,96 h内观察鱼体状态,记录死亡数。结果表明,高锰酸钾、亚甲基蓝和硫酸铜处理96 h对鹤顶红金鱼幼鱼的半致死浓度(LC_(50))分别为4.11、35.11、2.81 mg/L,3种药物对鹤顶红金鱼幼鱼的安全浓度分别为0.41、3.51、0.28 mg/L。可见,适宜浓度的高锰酸钾、亚甲基蓝和硫酸铜均可以在鹤顶红金鱼幼鱼养殖中安全使用。

关键词：鹤顶红金鱼幼鱼高锰酸钾亚甲基蓝硫酸铜急性毒性

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