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Guanine-assisted N-doped ordered mesoporous carbons as efficient capacity decaying suppression materials for lithium–sulfur batteries

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Journal of Materials Science & Technology 2022年第6期101卷 155-164页

作者： Riguang Cheng Yanxun Guan Yumei Luo Chenchen Zhang Yongpeng Xia Sheng Wei Mengmeng zhao Qi Lin Hao Li Shiyou Zheng Federico Rosei Lixian Sun Fen Xu Hongge Pan School of Material Science&Engineering Guangxi Key Laboratory of Information Materials and Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsGuilin University of Electronic TechnologyGuilin 541004China School of Mechanical&Electrical Engineering Guilin University of Electronic TechnologyGuilin 541004China School of Material Science&Engineering University of Shanghai for Science&TechnologyShanghai 200093China CentreÉnergie Matériaux et TélécommunicationsInstitut National de la Recherche Scientifique1650 Boul.Lionel BouletVarennesJ3×1S2QuébecCanada School of New Energy Science and Technology Xi’an Technological UniversityChina

Lithium–sulfur(Li–S)batteries are considered promising next-generation energy storage devices due to their high weight capacities and theoretical energy densities,which are significantly higher than those of conventional lithium-ion ***,the sulfur cathode presents two major drawbacks,specifically low specific capacity caused by the poor electrical conductivities of the active materials and fast capacity decay caused by polysulfide dissolution/***,a high-rate and high-stability dendritic material consisting of N-doped ordered mesoporous carbons(NOMCs)was successfully synthesized via a facile and low-cost calcination *** highly ordered mesoporous carbon skeleton limited the growth of the sulfur nanofiller within its channels and provided the necessary electrical contact with the insulating ***,N-doped heteroatoms presented strong binding sites for trapping polysulfide intermediates,achieving high electrochemical activity,which promoted polysulfide conversion *** a result,the prepared NOMC-2/S cathode material with 1.2-1.5 mg cm^(-2)of sulfur displayed excellent electrochemical performance with a high-rate capability of 460.5 m Ah g^(-1)at 1 C,a high specific capacity of 530.9 m Ah g^(-1)after 200 cycles at 0.1 C,and a decay rate of~0.19%per cycle.

关键词： Lithium–sulfur batteries N-doped ordered mesoporous carbons Electrochemistry

Controlled fabrication of Fe_(3)N@NG composites as superior oxygen evolution reaction electrocatalysts

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Carbon Resources Conversion 2024年第2期7卷 13-16页

作者： Yang Song Tongya Tian Changming Li Xi Zeng Sen Zhang Li Chen Zhenghua Yang Qizhe Ji Xianglong zhao Feiyong Chen Resources and Environment Innovation Institute Shandong Jianzhu UniversityJinan 250101PR China School of Science Shandong Jianzhu UniversityJinan 250101PR China Huzhou Nanxun District Jianda Ecological Environment Innovation Center Shandong Jianzhu UniversityHuzhouZhejiang 313009PR China State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048PR China

We report the controlled fabrication of nitrogen doped graphene(NG)nanoplates,which are uniformly decorated with iron nitride(Fe_(3)N)nanoparticles,via ball milling of mixtures of graphite and iron nitrates and the following ammonia *** obtained Fe_(3)N@NG composites demonstrate excellent electrocatalytic activity and durability for oxygen evolution reaction,both of which outperform those of the state-of-the-art iridium oxide *** may be attributed to nitrogen doping as well as the synergistic effect between Fe3N and graphene nanoplates.

关键词： Graphene Iron nitrides Ball milling Oxygen evolution reaction Electrocatalysts

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低渗透油藏水平井流入动态及影响因素

西南石油大学学报（自然科学版） 2009年第2期31卷 90-92页

作者：赵静中国石油吉林油田勘探开发研究院吉林松原138000 大庆石油学院地球科学学院黑龙江大庆163318

对低渗透油藏渗流规律不符合达西定律,普遍存在启动压力的特点,建立了低渗透油藏水平井油气两相渗流的数学模型,为水平井流入动态关系(IPR)曲线在低渗透油藏的应用提供了理论依据;分析了启动压力梯度、边界压力、边界半径、直线段斜率... 详细信息

对低渗透油藏渗流规律不符合达西定律,普遍存在启动压力的特点,建立了低渗透油藏水平井油气两相渗流的数学模型,为水平井流入动态关系(IPR)曲线在低渗透油藏的应用提供了理论依据;分析了启动压力梯度、边界压力、边界半径、直线段斜率和截距等因素对水平井IPR曲线的影响程度。研究表明:对于低渗透油藏,相同井底流压时,启动压力梯度越小,水平井产量越大;边界压力越大,水平井产量越大;边界半径越小,水平井产量越大;直线段斜率越大,水平井产量越大;直线段截距越大,水平井产量越大。

关键词：低渗透水平井启动压力流入动态影响因素

Sensitivity of Commercial Enzyme Inhibition Colorimetric Pesticide Residue Rapid Test Kit to a Variety of Pesticides

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Asian Agricultural Research 2024年第8期16卷 29-32页

作者： Junxia LUO Qianqian zhao Lumei DUAN Yanzhen LI Huifang QIAO Zhipei DOU Jianbo zhao Zhengzhou Product Quality Inspection and Testing Center Zhengzhou 450006China Jiaozuo Product Quality Inspection and Testing Center Kaifeng 454000China Kaifeng Product Quality Inspection and Testing Center Kaifeng 454000China Zhengzhou Agricultural Technology Extension Center Zhengzhou 450002China

[Objectives]To fully understand the quality of commercial enzyme inhibition-colorimetric pesticide residue rapid detection kits,so that they can play a greater role in the detection and supervision of agricultural products.[Methods]The sensitivity of 28 kinds of pesticides was determined by using the commercially available enzyme inhibition colorimetric rapid detection kit with Hendu brand.[Results]There was a significant difference in the sensitivity of the kit to each pesticide,and the kit was more sensitive to dichlorvos among the 28 pesticides *** sensitivity to methyl isosalifos,dimethoate,isocarbophos,fenthion and phorate was poor,and the sensitivity to quinalphos was different between 3.0 and 2.5 mL.[Conclusions]The large difference of the sensitivity of the enzyme inhibition-colorimetric rapid detection kit for pesticide residues to different kits is a reason for the false positive and false negative test results of the kit,which needs to be considered by relevant personnel.

关键词： Enzyme inhibition-colorimetry Reagent kit Pesticide Inhibition rate Sensitivity

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一类高阶微分方程亚纯解取小函数的收敛指数

上海交通大学学报 2016年第4期50卷 631-635页

作者：金瑾赵浩岚贵州工程应用技术学院数学系毕节循环经济研究院贵州毕节551700 上海金融学院国际经贸学院上海201209

研究了亚纯函数系数的高阶线性微分方程亚纯解取小函数的点的收敛指数问题,获得了线性微分方程亚纯解取小函数的点的收敛指数的精确估计.

关键词：高阶线性微分方程收敛指数超级小函数二级收敛指数

170 GHz回旋管大束流双阳极磁控注入电子枪的分析及设计

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强激光与粒子束 2011年第6期23卷 1602-1606页

作者：陈旭霖赵青电子科技大学高能电子学研究所成都610054

基于绝热压缩原理和强流电子光学理论,设计了一只170GHz回旋管双阳极磁控注入电子枪,经过理论分析及计算,采用仿真软件进行模拟和优化,最终得到的电子枪的电子注速度比为1.31,横向速度零散度为3.5%,纵向速度零散度为6.1%,束电流为51A。... 详细信息

基于绝热压缩原理和强流电子光学理论,设计了一只170GHz回旋管双阳极磁控注入电子枪,经过理论分析及计算,采用仿真软件进行模拟和优化,最终得到的电子枪的电子注速度比为1.31,横向速度零散度为3.5%,纵向速度零散度为6.1%,束电流为51A。讨论了阴极磁场、控制阳极电压和第二阳极电压等因素对电子注性能的影响,发现电子注的速度比和速度零散度对这些影响因子的变化都非常敏感:随着阴极磁场的增大,电子注的速度比减小,纵向速度零散度先增大后减小,横向速度零散度先减小后增大;阳极角越接近阴极倾角,纵向速度零散度越小;阳极角向着减小阴阳极间距的方向变化时横向速度零散度变小;增大第一阳极电压可以增大电子注的速度比和电子注的速度零散度。在两阳极电压不变的情况下,增大阴阳极之间的距离会使电子注的速度零散度和电子注的速度比减小。

关键词：回旋管双阳极磁控注入枪速度比速度零散度

Insights into Nano-and Micro-Structured Scaffolds for Advanced Electrochemical Energy Storage

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Nano-Micro Letters 2024年第7期16卷 187-230页

作者： Jiajia Qiu Yu Duan Shaoyuan Li Huaping zhao Wenhui Ma Weidong Shi Yong Lei Fachgebiet Angewandte Nanophysik Institut Für Physik and IMN MacroNanoTechnische Universit.t Ilmenau98693 IlmenauGermany Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093People’s Republic of China School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013People’s Republic of China School of Science and Technology Pu’er UniversityPu’er 665000People’s Republic of China

Adopting a nano-and micro-structuring approach to fully unleashing the genuine potential of electrode active material benefits in-depth understandings and research progress toward higher energy density electrochemical energy stor-age devices at all technology readiness *** to various challenging issues,especially limited stability,nano-and micro-structured(NMS)electrodes undergo fast electrochemical performance *** emerging NMS scaffold design is a pivotal aspect of many electrodes as it endows them with both robustness and electrochemical performance enhancement,even though it only occupies comple-mentary and facilitating components for the main ***,extensive efforts are urgently needed toward optimizing the stereoscopic geometrical design of NMS scaffolds to minimize the volume ratio and maximize their functionality to fulfill the ever-increasing dependency and desire for energy power source *** review will aim at highlighting these NMS scaffold design strategies,summariz-ing their corresponding strengths and challenges,and thereby outlining the potential solutions to resolve these challenges,design principles,and key perspectives for future research in this ***,this review will be one of the earliest reviews from this viewpoint.

关键词： Nano-and micro-structured Interconnected porous Scaffolds Electrode design Electrochemical energy storage

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超越亚纯函数差分的值分布

上海交通大学学报 2016年第5期50卷 814-818页

作者：金瑾赵浩岚贵州工程应用技术学院数学系贵州毕节551700 毕节循环经济研究院贵州毕节551700 上海金融学院国际经贸学院上海201209

利用亚纯函数的Nevanlinna值分布理论,研究了超越亚纯函数差分的值分布问题,得到了2个超越亚纯函数的值分布结果,推广和改进了一些文献中的结论.

关键词：超越亚纯函数值分布 Nevanlinna理论差分

Clinical characteristics and work-up of small to intermediate-sized pulmonary nodules in a Chinese dedicated cancer hospital

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Cancer Biology & Medicine 2020年第1期17卷 199-207页

作者： Xiaonan Cui Daiwei Han Marjolein AHeuvelmans Yihui Du Yingru zhao Lei Zhang Harry JMGroen Geertruida Hde Bock Monique DDorrius Matthijs Oudkerk Rozemarijn Vliegenthart zhaoxiang Ye Department of Radiology Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin's Clinical Research Center for CancerTianjin 300060China Department of Radiology University of GroningenUniversity Medical Center GroningenGroningen 9713 GZThe Netherlands Department of Epidemiology University of GroningenUniversity Medical Center GroningenGroningen 9713 GZThe Netherlands Medisch Spectrum Twente Department of PulmonologyEnschede 7512 KZThe Netherlands Department of Thoracic Surgery Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin’s Clinical Research Center for CancerTianjin 300060China Department of Pulmonary Diseases University of GroningenUniversity Medical Center GroningenGroningen 9713 GZThe Netherlands University of Groningen University Medical Center GroningenGroningen 9713 GZThe Netherlands

Objectives:To evaluate the characteristics and work-up of small to intermediate-sized pulmonary nodules in a Chinese dedicated cancer ***:Patients with pulmonary nodules 4–25 mm in diameter detected via computed tomography(CT)in 2013 were consecutively *** analysis was restricted to patients with a histological nodule diagnosis or a 2-year follow-up period without nodule growth confirming benign *** information was collected from hospital ***:Among the 314 nodules examined in 299 patients,212(67.5%)nodules in 206(68.9%)patients were *** to benign nodules,malignant nodules were larger(18.0 mm vs.12.5 mm,P<0.001),more often partly solid(16.0%vs.4.7%,P<0.001)and more often spiculated(72.2%vs.41.2%,P<0.001),with higher density in contrast-enhanced CT(67.0 HU vs.57.5 HU,P=0.015).Final diagnosis was based on surgery in 232 out of 314(73.9%)nodules,166 of which were identified as malignant[30(18.1%)stage III or IV]and 66 as *** 36 nodules(11.5%),diagnosis was confirmed by biopsy and the remainder verified based on stability of nodule size at follow-up imaging(n=46,14.6%).Among 65 nodules subjected to gene(EGFR)mutation analyses,28(43.1%)cases(EGFR19 n=13;EGFR21 n=15)were identified as EGFR mutant and 37(56.9%)as EGFR *** to surgery,the majority of patients[n=194(83.6%)]received a contrast-enhanced CT scan for staging of both malignant[n=140(84.3%)]and benign[n=54(81.8%)]*** of positron emission tomography(PET)-CT was relatively uncommon[n=38(16.4%)].Conclusions:CT-derived nodule assessment assists in diagnosis of small to intermediate-sized malignant pulmonary ***,contrast-enhanced CT is commonly used as the sole diagnostic confirmation technique for pre-surgical staging,often resulting in surgery for late-stage disease and unnecessary surgery in cases of benign nodules.

关键词： Lung nodule diagnosis computed tomography pathology China