Investigation of Air Electrodes for Lithium-air Batteries and Nano-Fe2O3 as Positive Electrode Material

锂空气电池因其在化学电源中具有最高的理论比能量而受到越来越多研究者的关注。但在实际应用中，由于在空气电极中的微孔被不溶于有机电解液的放电产物所堵塞，导致空气电极失效，放电终止，因此使得实际应用的锂空气电池远远达不到其理论容量。在锂空气电极中，空气电极结构、电解液组成、氧分压、氧溶解度和扩散系数都对电池性能有着重要影响。其中空气电极对锂空气电池性能影响最大，影响空气电极性能的因素包括所应用的碳材料、粘结剂和催化剂种类等。因此，研究通过优选和改性碳材料、添加催化剂、选择粘结剂和改善电解液等方法来提高锂空气电池性能，是国内外研究的热点课题。 本文设计了一种具有气体扩散电极的锂空气电池装置，并将其应...Lithium-air batteries have attracted more and more researchers’ attention for their highest theoretical specific energy in all the electrolchemical power sources. However, in practice, the porous air electrodes will be blocked by the discharge products that are not soluble in organic electrolyte, which leads to discharge of the air electrodes ending. Therefore, the capacity of practical lithium-ai...学位：理学硕士院系专业：化学化工学院化学系_物理化学(含化学物理)学号：2052008115173

Application of carbon materials in lithium-air battery and its development

作者简介：武巍(1984—)，男，河北省人，硕士生，主要研究方向为 锂空气电池。 联系人：杨勇，Email: [email protected][中文文摘]综述了有关锂空气电池所应用的碳材料的种类及其性能,总结了不同种类碳材料的物理参数,如比表面积、孔体积、粒子尺度以及电导性等对锂空气电池性能的影响规律;以及碳材料改性对锂空气电池氧电极的性能改善。已有的文献数据表明用于锂空气电池的碳材料必须具有较好的导电性、较大的比表面积、合适的孔体积和粒子尺度等。这些物理化学参数为应用于锂空气电池的碳材料的选择提供了依据。[英文文摘]The different types and physical properties of carbon materials used in lithium-air battery field were summarized, and the influence of the various physical parameters of carbon materials on the performance of lithium air battery were discussed, such as specific surface area, pore volume, particle size and conductivity. The research progress in the modifications of carbon materials was also simply summarized. It is concluded that carbon with good electrical conductivity, large surface area, appropriate pore volume and particle size are necessary, which governs the electrochemical performance of oxygen cathode. These physical parameters can be the basic criteria for selection of carbon material as cathode material in lithium air batteries.基金项目：国家“973”计划课题资助(2011CB935903

The Analysis of Sectoral Output and Household Income Multipliers Based on Social Accounting Matrix of Xiamen City

基于厦门市2002年投入产出表及其他相关数据,笔者构建了厦门市2002年的宏观社会核算矩阵,并对居民账户进行了细分。在此基础上,利用基于社会核算矩阵的SAM乘数模型,本文考察了各类产业在外生冲击下的产出效应和居民收入效应,并分析了外生冲击及转移支付对居民收入分配结构的影响。结果显示,产出乘数和居民收入乘数较高的行业分别是那些与其他行业具有较高关联度的行业和对社会就业带动作用较大的劳动密集型行业;厦门市当前经济的结构和转移分配都有利于改善当前居民收入差距过大的现状,但前者的效应不大。Based on the input-output table of Xiamen city in 2002 and other related data,this paper constructs a social accounting matrix(SAM).In this SAM,we classify the urban households' accounts by their income levels.Further,we study the output and household income impacts of each sector under exogenous shocks using SAM multiplier model,and also analyze the impacts of exogenous shock and transfer payment on the household income distribution structure.The results show that the sectors with higher output and household income multipliers are those which have higher association with others or labor-density sectors;the Xiamen city's current economic structure and transfer payment mode are in favor of improving the unequal household income situation at present.However,the former's effect is not large.国家自然科学基金资助项目(项目批准号:70671086

ATS腎炎におけるメサンギウム融解後の糸球体再構築

To analyze the repair process of glomerular capillary after injury, anti-mesangial cell anti-body-induced glomerulonephritis was induced in the rat. Isolated glomeruli were prepared from the kidneys by sieving method. Using focal laser scanning immunofluorescent microscopy, of which the advantages are able to visualize fluorescent molecules in a single plane of focus, to avoid the risk of artifacts by mechanical sectioning, to record images of serial sections at different depths of samples, and to analyze three-dimensionally, we showed that regeneration of glomerular capillaries seemed to proceed chiefly by angiogenetic branching from the remaining microvas-culatres around the avascular lesions.departmental bulletin pape

生物能源及其环境生态效益

在全球变暖、环境危机和能源危机突出的背景下，生物能源的发展已经成为能源发展的主流方向之一。本文介绍了当前最具有代表性的生物能源，燃料乙醇、生物柴油、生物氢气和沼气。从生物能源的原料生物质的成分、应用的便利性、温室气体减排、对农业的促进作业和循环经济等方面论述了生物能源的环境生态效益。生物能源的开发利用将促进经济的可持续发展，为全球生态环境的改善带来强有力的支持。</jats:p

The Electrocatalytic Study of LiCoO_2 in Air Electrode for Lithium-Air Battery

自设计建立锂空气电池实验装置,研究以掺入lICOO2作为电催化剂的空气正极的电化学性能及其放电前后催化剂结构的变化.循环伏安、Xrd及充放电测试等表明,lICOO2能够很大程度地改善空气电极的放电性能.尤其是在放电前,将掺有lICOO2的空气正极充电至4.1 V,此时lICOO2的CO元素呈现较高的价态(CO3+/CO4+),催化作用因此更加显著.The LiCoO2 has been investigated as a new electrocatalyst for air electrodes using homemade lithium-air battery.The electrochemical performance and structural changes of the LiCoO2 based composite air electrodes have been studied.The results of CV,XRD and charge-discharge tests show that the composite air electrodes composed of LiCoO2 can greatly improve the discharge performance of lithium-air batteries.In particular when the composite air electrodes are charged to 4.1 V before further discharging,the obvious catalytic effects of LiCoO2 are attributed to higher valence state of the Co element in LiCoO2,especially at charged state.国家973计划课题(No.2011CB935903)资

Laser Power Attenuation by Powder Flow in Coaxial Laser Cladding

为了得到同轴送粉激光熔覆中激光束穿过粉末流后的能量变化,研究了粉末浓度分布对激光能量的衰减作用。模拟了稳态、存在基底和熔池的情况下粉末流的空间分布,通过粉末浓度与激光能量衰减的关系,得到了任意粉末分布及激光能量分布下的衰减率。研究了基底对气流场的作用以及基底对粉末的反弹作用两种因素对粉末浓度分布的影响,并比较了平顶形光束在不同熔池尺寸和送粉率下的衰减率。结果表明,存在基底时粉末流对激光的衰减率比无基底作用时一般高2倍以上,与送粉率成正比,在熔池尺寸较小时与其大小成反比