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政府补贴政策对再制造供应链碳排放及产品质量的影响

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重庆三峡学院学报 2024年第6期40卷 79-92页

作者：余利娥刘从虎淮北师范大学经济与管理学院安徽淮北235000 宿州学院机械与电子工程学院安徽宿州234000

再制造可以降低产品生产过程中产生的碳排放,因此受到政府的大力支持,且产品质量对消费者购买再制造品具有重要的影响。通过构建三种供应链博弈模型:政府采取直接补贴政策、政府采取质量补贴政策及政府不采取补贴政策模型,以探究政府补... 详细信息

再制造可以降低产品生产过程中产生的碳排放,因此受到政府的大力支持,且产品质量对消费者购买再制造品具有重要的影响。通过构建三种供应链博弈模型:政府采取直接补贴政策、政府采取质量补贴政策及政府不采取补贴政策模型,以探究政府补贴政策对再制造供应链碳排放及产品质量的影响。研究结果表明:当生产单位再制造品和新产品的碳排放比值较低时,政府采取的两种再制造补贴政策,均可以降低供应链的碳排放;政府提高固定补贴金额或质量补贴系数可以降低供应链的碳排放,但不能无限提高固定补贴金额或质量补贴系数,否则会压制独立再制造商提高再制造能力;政府应该补贴再制造能力较弱的独立再制造商,以免将原制造商挤压出市场。此外,只有质量补贴政策能提高再制造品的质量。不同的政府补贴政策对再制造供应链碳排放及产品质量的影响存在差异。政府应选择合理的补贴政策及补贴参数,以降低再制造供应链的碳排放,并提高再制造品的质量,从而促进再制造产业高质量发展。

关键词：再制造直接补贴质量补贴碳排放

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聚乙烯管材中晶点的结构表征及分析

塑料工业 2024年第8期52卷 123-129页

作者：张晓伟李玉娥张伟刘张硕刘云鹏华晔中石化(北京)化工研究院有限公司北京100013

通过光学显微镜、扫描电子显微镜、分子量分布、差示扫描量热仪、傅里叶变换红外光谱仪等表征手段以及连续自成核退火热分级法对聚乙烯管材表面的晶点进行了详细的表征与分析,研究了管材表面晶点的组成和分子链结构,分析了晶点形成的原... 详细信息

通过光学显微镜、扫描电子显微镜、分子量分布、差示扫描量热仪、傅里叶变换红外光谱仪等表征手段以及连续自成核退火热分级法对聚乙烯管材表面的晶点进行了详细的表征与分析,研究了管材表面晶点的组成和分子链结构,分析了晶点形成的原因。结果表明,聚乙烯管材表面的晶点呈现局域态的晶片堆积结构,同时有一些裂纹的产生,凸起的晶点区域由分子量较高的高分子链段构成,在加工过程中,高分子量链段部分移动较慢,容易缠结而形成晶点。相较于样品无晶点的区域,有晶点区域的结晶焓较低,结晶温度较低,熔融焓较低,结晶度也较低。热分级结果显示,样品有无晶点区域的差异主要体现在高温熔融区,样品有晶点区域的高温熔融峰位都较低,这表明晶点区域的分子链结构规整度低,所形成的片晶厚度较小。对比3种由不同管材专用料所制成管材样品表面晶点之间的区别,发现共聚单体链段结构越长,所形成的晶点较大,高分子量部分含量越高,所形成的片晶厚度也更大。

关键词：聚乙烯管材晶点分子量分布结晶度

煤炭资源枯竭型城市绿色转型效率评价和影响因素——基于SBM与Tobit面板模型

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沈阳大学学报（社会科学版） 2024年第1期26卷 54-63页

作者：余利娥郝玉帝高婷婷淮北师范大学经济与管理学院安徽淮北235000 淮北师范大学碳中和研究中心安徽淮北235000

考虑数据的客观性、科学性、全面性和可获得性,选择35个煤炭资源枯竭型城市作为研究对象,在构建煤炭资源枯竭型城市绿色转型效率评价指标体系和选择影响因素指标的基础上,收集2011—2019年35个城市的相关数据,利用SBM与Tobit面板模型,... 详细信息

考虑数据的客观性、科学性、全面性和可获得性,选择35个煤炭资源枯竭型城市作为研究对象,在构建煤炭资源枯竭型城市绿色转型效率评价指标体系和选择影响因素指标的基础上,收集2011—2019年35个城市的相关数据,利用SBM与Tobit面板模型,对煤炭资源枯竭型城市的绿色转型效率进行评价,并分析影响绿色转型效率的主要因素。研究结论表明:我国煤炭资源枯竭型城市的绿色转型效率整体水平比较低;只有铜川市的绿色转型效率达到最优水平,其他城市均存在效率损失;科学技术支出对煤炭资源枯竭型城市的绿色转型效率影响最大;经济发展水平对绿色转型效率有正向影响,而经济开放水平对绿色转型效率有负向影响。

关键词：煤炭资源枯竭型城市绿色转型效率 SBM模型影响因素 Tobit模型

li-current collector interface in lithium metal batteries

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Nano Research 2024年第10期17卷 8706-8728页

作者： Tian-yu Wang Dingyi Zhao Keyue liang yuzhang li Department of Chemical and Biomolecular engineering University of CaliforniaLos AngelesLos AngelesCalifornia 90095USA

Interfaces within batteries,such as the widely studied solid electrolyte interface(SeI),profoundly influence battery *** these interfaces,the solid-solid interface between electrode materials and current collectors is crucial to battery performance but has received less discussion and *** review highlights the latest research advancements on the solid-solid interface between lithium metal(the next-generation anode)and current collectors(typically copper),focusing on factors affecting the li-current collector interface and improvement strategies from perspectives of current collector substrate(lithiophilicity,crystal facets,mechanical properties,and topological structure),electrolyte chemistry,current density,stacking pressure,SeI,electric field and temperature,and provides a future directions and opportunities on this topic.

关键词： lithium metal anode current collectors li-current collector interface solid-solid interface improvement strategies

宫颈组织剪切波弹性成像技术结合人绒毛膜促性腺激素β亚基检测对高龄孕妇流产风险的评估价值

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当代医学 2024年第10期30卷 155-158页

作者：王红芳张翠珍李玉娥天水市第一人民医院产科甘肃天水741018

目的探究宫颈组织剪切波弹性成像(SWe)技术结合人绒毛膜促性腺激素β亚基(β-HCG)检测对高龄孕妇流产风险的评估价值。方法选取2019年2月至2021年12月天水市第一人民医院收治的80名高龄伴流产风险孕妇作为研究组,另选取同期于本院进行... 详细信息

目的探究宫颈组织剪切波弹性成像(SWe)技术结合人绒毛膜促性腺激素β亚基(β-HCG)检测对高龄孕妇流产风险的评估价值。方法选取2019年2月至2021年12月天水市第一人民医院收治的80名高龄伴流产风险孕妇作为研究组,另选取同期于本院进行产检的85名高龄健康孕妇作为对照组。所有研究对象均进行宫颈组织SWe检查和血清β-HCG表达水平测定,比较两组宫颈组织SWe参数杨氏模量值和血清β-HCG表达水平,采用ROC曲线分析杨氏模量值和β-HCG表达水平在评估高龄孕妇流产风险中的应用价值。结果研究组宫颈长度(CL)短于对照组,宫颈内口应变率(IS)明显高于对照组,差异有统计学意义(PeS)比较差异无统计学意义。研究组宫颈组织内口、外口的杨氏模量值均低于对照组,差异有统计学意义(P<0.05)。研究组血清β-HCG水平为(5742.65±229.71)mIU/ml,低于对照组的(10332.47±413.28)mIU/ml,差异有统计学意义(P<0.05)。ROC曲线结果显示,宫颈组织内口、外口杨氏模量值、血清β-HCG及三者联合评估高龄孕妇流产风险的曲线下面积分别为0.739、0.731、0.782、0.874(P<0.05)。结论宫颈组织杨氏模量值与血清β-HCG水平在高龄伴流产风险孕妇中均呈显著低水平,二者联合检查能有效评估高龄孕妇的流产风险,临床具有较高应用价值。

关键词：高龄孕妇流产宫颈组织剪切波弹性成像技术风险评估人绒毛膜促性腺激素β亚基

Congener-derived template to construct lithiophilic organic-inorganic layer/interphase for high volumetric capacity dendrite-free li metal batteries

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Chinese Chemical Letters 2024年第3期35卷 453-460页

作者： Kang Yang Long li yuanbin Xiao Qiaoli Zhang Chenpeng Xi Borong li Yan yu Chengkai Yang Key Laboratory of Advanced Materials Technologies International(HongKong Macao and Taiwan)Joint Laboratory on Advanced Materials TechnologiesCollege of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China

The development of lithium-metal batteries(LMBs)is seriously restricted by the out-of-control dendrites growth and infinite volume ***,a pervasive organic-inorganic layer construction strategy is reported for the composite lithium metal anode with congener-derived organic-inorganic solid electrolyte interphase(SeI).In this strategy,the organic-inorganic Ag@polydopamine(Ag@PDA)layer is coated on the arbitrary substrates by a simple two-step *** thin and stable congener-derived SeI is insitu formed with fewer inorganic components and more organic components during charging/*** polydopamine with sufficient adhesion groups and lithiophilic Ag layer realize near-zero nucleation overpotential during lithium *** low interface resistance and stable lithium deposition are ***,the practical areal and volumetric capacities of the composite anode with three-dimensional copper(3DCu)as the substrate are 10 mAh/cm^(2)and 1538 mAh/cm^3(*** mass of anode).The symmetrical cell shows very low polarization voltage(10 mV)and more than 2500 h cycles life at 1 mA/cm^(2)(1 mAh/cm^(2)).The liNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)-based full cells show improved capacity retention(82%)after 100 cycles at 0.5 *** modified lithiophilic anode with congener-derived interphase provides a promising strategy to realize the next-generation dendrite-free LMBs.

关键词： lithium metal anode Congener-derived lithiophilicity Volumetric capacity Organic-inorganic interphase

effect of Cr_(2)O_(3) on properties of CaO-SiO_(2)-Fe_(t)O-MgO system and dissolution behavior of lime

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Journal of Iron and Steel Research International 2024年第4期31卷 870-881页

作者： Shan-nan li Jian-li li yue yu Hang-yu Zhu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking Wuhan University of Science and TechnologyWuhan 430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of education Wuhan University of Science and TechnologyWuhan 430081HubeiChina

The productivity of the chrome-containing semi-steel converter smelting process is directly affected by the slag-forming speed during the converter preliminary *** effects of Cr_(2)O_(3) content on the physicochemical properties of the CaO-SiO_(2)-Fe_(t)O-MgO system,such as melting temperature,solidification behavior,mineral composition,and lime dissolution rate,were *** results showed that the slag was an amorphous phase at 1500℃.When Cr_(2)O_(3) was added,Ca(Fe,Mg)Si_(2)O_(6) and spinel were formed in the *** the increase in Cr_(2)O_(3) content,the amount of spinel precipitation increased,and the dendritic FegO_(4) crystal gradually changed into the granular(Fe,Mg)(Fe,Cr)2O_(4) *** the Cr_(2)O_(3) content increased from O to 2.91 wt.%,the melting temperature of the slag rose,and the melting range of the slag expanded slightly,but the lime dissolution rate did not *** the Cr_(2)O_(3) content further increased to 9.09 wt.%,the melting temperature continued to rise,the melting range rapidly expanded,and the lime dissolution rate decreased.

关键词： Cr_(2)O_(3) Vanadium-titanium magnetite Converter Slag lime dissolution

Optimal geometrical configuration and oxidation state of cobalt cations in spinel oxides to promote the performance of li-O_(2) battery

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Nano Research 2024年第1期17卷 221-227页

作者： yu Zhang Shuting Zhang Mengwei yuan yufeng li Rong liu Caiyun Nan Chen Chen engineering Research Center of Advanced Rare earth Materials Department of ChemistryTsinghua UniversityBeijing 100084China Beijing Key Laboratory of energy Conversion and Storage Materials Institution College of ChemistryBeijing Normal UniversityBeijing 100875China X-ray diffraction Lab Analytical and Testing CenterBeijing Normal UniversityBeijing 100875China

Co_(3)O_(4) is considered as one of promising cathode catalysts for lithium oxygen(li-O_(2))batteries,which contains both tetrahedral Co^(2+)sites(Co^(2+)Td)and octahedral Co^(3+)sites(Co^(3+)Oh).It is important to reveal the effect of optimal geometric configuration and oxidation state of cobalt ion in Co_(3)O_(4) to improve the performance of li-O_(2) ***,through regulating the synthesis process,Co^(2+)and Co^(3+)sites in Co_(3)O_(4) were replaced with Zn and Al atoms to form materials with a unique Co *** li-O_(2) batteries based on ZnCo_(2)O_(4) showed longer cycle life than that of CoAl_(2)O_(4),suggesting that in Co_(3)O_(4),the Co^(3+)Oh site is a relatively better geometric configuration than Co^(2+)Td site for li-O_(2) *** calculations revealed that Co^(3+)Oh sites provide higher catalysis activity,regulating the adsorption energy of the intermediate liO_(2) and accelerating the kinetics of the reaction in batteries,which further leads to the change of the morphology of the discharge product and ultimately improves the electrochemical performance of the batteries.

关键词： lithium oxygen(li-O_(2))batteries geometrical configuration oxidation state lithium peroxide

Integration of urchin-like MnCo_(2)O_(4)@C core–shell nanowire arrays within porous copper current collector for superior performance li-ion battery anodes

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Rare Metals 2024年第2期43卷 599-611页

作者： Xue-Ru Zhang Qiong Wu Yong Zhang Xi-Fei li Ting Xie yu-Cheng Wu Instrumental Analysis Center Hefei University of TechnologyHefei230009China Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei230009China School of Materials Science and engineering Hefei University of TechnologyHefei230009China Institute of Advanced electrochemical energy Xi’an University of TechnologyXi’an710048China

Spinel MnCo_(2)O_(4) is a promising energy storage candidate as anode materials in lithium-ion batteries owing to synergistic effects of two intrinsic solid-state redox ***,low conductivity,poor rate capacity and rapid capacity fading have seriously impaired its practical *** overcome the inferiorities,urchin-like MnCo_(2)O_(4)@C core–shell nanowire arrays have been fabricated directly within a porous copper current collector via a facile hydrothermal method followed by a chemical vapor deposition carbonization *** a typical nanowire,the core is composed of interconnected MnCo_(2)O_(4)nanoparticles and the shell shows as a thin amorphous carbon *** integrated MnCo_(2)O_(4)@C/Cu structure could act as working anodes without using additives or polymer *** MnCo_(2)O_(4)@C/Cu possesses slightly longer li-ion insertion/desertion pathway than that of MnCo_(2)O_(4)/Cu,the carbon shell could effectively prevent the pulverization of MnCo_(2)O_(4) and lower down charge transfer resistance and actively participate in li-ion *** rearrangement of carbon atoms during lithiation/delithiation cycling could inhibit the formation of passive solid electrolyte interphase *** a result,the MnCo_(2)O_(4)@C/Cu electrode presents superior rate capacity(600 mAh·g^(−1) at 1 A·g^(−1)) and better stability(797 mAh·g^(−1) after 200 cycles at 100 mA·g^(−1)).The excellent reversible li ion storage capacity,cycling stability and rate capacity endow MnCo_(2)O_(4)@C/Cu great potential as stable and high output integrated anode materials in li-ion batteries.

关键词： MnCo_(2)O_(4)@C Urchin-like nanowire arrays Core-shell Integrated anode materials lithium-ion batteries