Study and Fabrication on the Pt catalyst of Micro Direct Methanol Fuel Cell

微型直接甲醇燃料电池（MicroDirectMethanolFuelCell，简称µ-DMFC）具有发电效率高、体积和重量比能量密度高、燃料补给方便、储存携带方便、环境污染小等优点，使其成为在便携式电子设备上最具应用前景的新能源之一。燃料电池也是一种通过电化学反应，持续地将燃料和氧化剂的化学能直接转化成电能的发电装置，而微型直接甲醇燃料电池（µ-DMFC)是直接利用甲醇作为阳极燃料的质子交换膜燃料电池，它具有工作时间长，工作温度低，甲醇来源丰富且存储方便，易于微型化和集成，以及产物对环境污染小等优点，是最有希望替代便携式电子设备中使用的传统电源的新型电源之一。 首先，...Micro Direct Methanol Fuel Cell (µ-DMFC) with high efficiency, high volume and weight ratio capacity density, convenient fuel supplies, storage easy to carry, small environment pollution, etc. is one of the most application prospect of new energy in portable electronic devices. Fuel cell is a kind of energy power generation devices, by electrochemical reaction which, persistently transforms ...学位：工学硕士院系专业：物理与机电工程学院_机械设计及理论学号：1992011115281

Design and Implementation of Unicom Customer Network Management System Based on the WEB

在通信市场竞争日益激烈的今天，大客户对于运营商的重要性不言而喻。80％的通信收入来源于20％的大客户。发展大客户用户，可以使运营商在市场竞争中获得更大的价值利益。为了改进大客户售后服务质量和响应时间，提高客户满意度和市场整体竞争力，降低大客户相关业务维护工作的复杂度，需要尽快建设以客户和业务为管理中心的大客户网管系统。 本文所研究的大客户网管系统是一个多专业、综合化的管理系统；它是收集、传输、处理和存储有关网络维护、运营和管理信息的一个综合管理系统；它能够让后台网络管理部门集中和实时监控大客户业务的运行质量和网络运行状况，先于客户发现故障，变被动维护为主动维护，确保大客户故障及时得到处理，快...At present,competition for the telecom market has been much fiercer. The key client is definitely important to operators. Over 80％income is derived from 20％key client. To develop the key client,the operators Call earn more benefit from the market. For the purpose of improving after-sale service quality and respone time,also the client satisfaction and market competition power,reducing the complexi...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201023027

High-Quality Quartz Thin Film Prepared by Lapping and Chemical & Mechanical Polishing Technology

石英薄膜的质量是决定各种石英基底的微纳器件品质高低的关键所在。阐述如何运用研磨和化学机械抛光CMP(CHEMICAl&MECHAnICAl POlISHIng)技术获得高品质石英薄膜的方法。由于石英属于高硬度材料,选用金刚石研磨液和球墨铸铁研磨盘对石英衬底进行研磨,以获得较高的研磨速率和较好的研磨后的表面粗糙度。在石英CMP中,采用特殊的“两步抛“工艺,对衬底进行抛光。第一步粗抛抛光液采用金刚石颗粒直径为0.3μM的研磨液与SIO2颗粒直径为50 nM的抛光液相混合,第二步精抛只采用SIO2的抛光液。实验结果表明,采用上述技术,可以获得高品质的石英薄膜,厚度为(25.1±3.2)μM,表面粗糙度约为0.89 nM(rMS)。The quality of quartz thin film is a key to various kinds of quartz-based micro and nano devices.This paper presents techniques to gain high quality quartz thin film with lapping and chemical & mechanical polishing(CMP).Due to high hardness of quartz,diamond slurry and ductile iron plate are used for lapping the quartz substrate to get higher grinding rate and better roughness of the grinded surface.Fro CMP,a special procedure of "2step-polishing"is developed,for which the first step is to use diamond slurry containing 0.3 μm particles mixed with SiO 2 slurry containing 50 nm particles,and the second step is to use only SiO 2 slurry.Tested results show that a high quality quartz film,with thickness of(25.1±3.2) μm and roughness of 0.89 nm(RMS),is acquired by using the techniques presented in the paper.国家自然科学基金重点项目(60936003

Structure analysis of anode flow field of micro direct methanol fuel cell based on Fluent

微型直接甲醇燃料电池中阳极流场结构对电池的性能有着重要的影响。为了合理设计阳极流场结构,改善甲醇燃料在阳极流场中的分布,采用计算流体动力学(Cfd)软件fluEnT对微型直接甲醇燃料电池进行建模并仿真分析。分析比较了点型、平行和蛇形3种不同流场图案下得到的压降与流速分布,得出蛇形流场能够更有利于甲醇燃料的均匀分配。在此基础上分别建立不同流道宽度(800,400,200,100μM)的蛇形流场模型,通过仿真计算甲醇燃料的分布情况来分析其对燃料电池性能的影响,并结合实验结果进行对比得出流道宽度为200~400μM之间为优化值。Structure of anode flow field is very important for micro direct methanol fuel cell.To optimize the structure of the anode flow field and the distribution of methanol in it,a model of micro direct methanol fuel cell is created and analyzed by using the computational fluid dynamics(CFD) software.The influence of flow field shapes of grid,parallel and serpentine are analyzed and the pressure drop and velocity distribution in the three kinds of flow fields are studied.It shows that the flow field of serpentine is the best for the even distribution of fuel.Based on this,serpentine flow field models with different width(800,400,200 and 100 μm) are created.Simulations are taken to analyze the influence of distribution to cell performance and compared with experimental results,it shows that the optimal value of flow channel width is 200 ~400 μm.国家自然科学基金重点资助项目(60936003

Design and Fabrication of Stack Micro-Direct Methanol Fuel CellUsing Silicon and PDMS

在堆栈式微型直接甲醇燃料电池μ-dMfC(MICrO-dIrECT METHAnOl fuEl CEll)中,为了避免硅基流场板因为封装压力过大而破裂,采用了硅和PdMS(POlydIMETHylSIlOXAnE,聚二甲基硅氧烷)材料分别制作阳极和阴极流场板。首先,采用微机电系统MEMS(MICrO-ElECTrO-MECHAnICAl SySTEMS)技术制作硅基阳极流场板。其次,通过铜箔与阴极流场板一体成型、有机清洗和PdMS表面活化等改进措施显著提升了PdMS阴极流场板金属化的能力。最后,比较和分析阳极流场板上3种不同结构的流道形式的堆栈式μ-dMfC的输出性能。实验结果表明,活化后的PdMS阴极流场板与Cr/Au的粘附性能和粘接强度显著提高,同时阳极流场板的流道一半开设为凸台,一半开设为通孔时,其堆栈式μ-dMfC的输出性能最优。最大输出电流密度为81.25 MA/CM2,最大输出功率为7.73 MW/CM2。采用硅和PdMS材料分别制作流场板,不仅简化了堆栈式μ-dMfC的结构,而且能够缓冲锁紧力,有效保护硅基阳极流场板。同时优化阳极流场板上的流道结构,能够有效提升堆栈式μ-dMfC的输出性能。In order to avoid cracks of the silicon flow field plate caused by high package pressure,silicon and PDMS(Polydimethylsiloxane)are used as anodic and cathode flow field plate respectively in the stack μ-DMFC(Micro-direct methanol fuel cell).The anodic flow field plate based on silicon is fabricated with MEMS(Micro-Electro-Mechanical Systems)technology,and cathode flow field plate is fabricated using PDMS and its metallic performance is evidently improved by means of integral shaping of copper foil and cathode flow field plate,organic cleaning and activation on PDMS surface.The output of stack μ-DMFC is tested and analyzed,in which 3 different flow channel structures on the anodic plate are introduced.Tested results verify that adhesive capability and strengthen between post-activated PDMS and Cr/Au are greatly improved,and when micro blocks and through holes are introduced alternately in the flow channel of anodic flow field plate the stack μ-DMFC can obtain the maximum output,with voltage of 0.5 V,current density of 81.25 mA/cm2 and output power density of 7.73 mW/cm2.This study shows that using silicon and PDMS as flow field plate respectively not only simplifies the structure of stack μ-DMFC but also cushions clamping force and effectively protects anodic flow field plate,and furthermore to increase the output of stack μ-DMFC by optimizing structure of flow channels on the anodic flow field plate.国家自然科学基金重点项目(60936003

Recent developments in the electrolyte for LiC _6/electrolyte/cathode battery

综述现今锂离子电池电解液的研究进展 .评估了电解液中锂盐、溶剂、填加剂以及杂质等对电解液的电导、固体电解质相界面 (SEI)的形成、电池循环寿命等的影响We present a reviewed the development and status of electrolyte for LiC 6/electrolyte/cathode battery. The effect of the salt, solvent, additive and impurity on the conductivity of the electrolyte, formation of the solid_electrolyte_interphase (SEI) and cycle life of the battery were described.作者联系地址：厦门大学化学系固体表面物理化学国家重点实验室 ,厦门大学宝龙电池研究所 福建厦门,361005Author's Address: State Key Lab for Phys. Chem. of Solid Surface and Dept. of Chem., Xiamen Univ.; Xiamen University and Powerlong Battery Research Institute. Inc, Department of Chemistry,

PERFORMANCE COMPARISON AND ANALYSIS of MICRO DIRECT METHANOL FUEL CELL BASED ON TRANSPARENT FLOW CHANNEL WITH DIFFERENT WIDTH

以微型直接甲醇燃料电池(MICrO dIrECT METHAnOl fuEl CEll,简称μ-dMfC)输出性能为研究对象,首先通过MEMS(MICrO-ElECTrO-MECHAnICAl SySTEMS,微机电系统)工艺,分别制作4种透明的不同流道宽度(800、400、200、100μM)的阳极流场板,并进行μ-dMfC的整体封装。而后,选定某一特定流道宽度的μ-dMfC,研究不同甲醇溶液流速对μ-dMfC输出性能的影响。所制作的透明流道可实时观察μ-dMfC内阳极流场板CO2气体的生成。实验结果表明:阳极流场板选用流道宽度为400μM,1MOl/l甲醇溶液的流速为1Ml/MIn时,μ-dMfC的输出性能最优,最大输出功率为4.62MW/CM2,最大电流密度为49.11MA/CM2。合理的流道宽度和甲醇流速对于获得最优的μ-dMfC输出性能有重要影响。The output performance of micro direct methanol fuel cell( μ-DMFC) was chosen as research object.Firstly,the four pieces of anode flow plates with different transparent flow channel width( 800μm,400μm,200μm and 100μm) were fabricated with the process of Micro-Electro-Mechanical Systems( MEMS),and μ-DMFC was wholly packed.Then,the μ-DMFC of the certain flow channel width was chosen to research the impact of different flow velocity of methanol solution on output performance of μ-DMFC.The generation of CO2bubbles in the anode flow plate can be real-time observed through the transparent flow channel.The results show the best performance of μ-DMFC with maximum output power density of 4.62mW /cm2and maximum current density of49.11mA / cm2is attained when the flow velocity of 1mol /L methanol solution is 1mL /min on the anode flow plate of flow width of 400μm.The suitable width of flow channel and the flow velocity of the methanol solution have very important influence on achieving the best output performance of μ-DMFC.国家自然科学基金重点项目(60936003

鲮鱼遗传改良的研究 Ⅰ.杂交育种和遗传性状分析

本文介绍用杂交选育方法改良鲮鱼(Cirrhinus molitorella)耐低温能力的试验经过和已取得的进展。同时,分析讨论了杂交后代(一代和二代)性状遗传的某些结果。对鱼类低温适应和抗冻、抗寒等方面的研究进展作了介绍和讨论,并认为只有把鱼类耐低温性状遗传的分子机理彻底阐明,人们才有可能直接利用基因工程技术定向地改良像鲮鱼等不耐寒物种的抗寒性能。此外,我们也对如何改进鱼类杂交选育的技术措施提出一些意见

Study on the Viscosity of LBG/Acetone Solution Mixed with different Silica

本文讨论了增塑剂、剪切速率、不同含量和不同表面性质的二氧化硅对LBG(一种偏氟乙烯和六氟丙烯共聚物 )的丙酮溶液粘度的影响机理LBG is a copolymer of vinylidene fluoride (VF2) and hexafluorpropylene (HFP), factors that influence the viscosity of the LBG solution such as the shear rate, plasticizer, the content of the fumed silica with different surface treatment are discussed in detail.作者联系地址：厦门大学化学系固体表面物理化学国家重点实验室,厦门大学化学系固体表面物理化学国家重点实验室,厦门大学化学系固体表面物理化学国家重点实验室,厦门大学化学系固体表面物理化学国家重点实验室,厦门大学化学系固体表面物理化学国家重点实验室,厦门大学化学系固体表面物理化学Author's Address: State Key Lab for Phys. Chem. of Solid Surface and Dept. of Chem., Xiamen Univ., Xiamen 361005, Chin

城镇产业布局决策支持系统关键技术研发及在北京援疆中的应用研究

《城镇产业布局决策支持系统关键技术研发及在北京援疆中的应用研究》项目是国家“十一五”科技支撑计划重大项目与北京科技援疆项目有机结合的综合性研究项目。一方面以国家“十一五”科技支撑计划重大项目课题“城镇产业布局分析系统开发”(2006BAJ05A06)等6项国家纵向研究项目为研究支撑,另一方面以26项以新疆和田地区、克拉玛依市、吐鲁番地区、沙湾县等为主委托的城镇体系规划、城市总体规划、城镇产业布局规划、产业集聚区规划、“十二五”经济社会发展规划、工业园区选址设计等横向项目及科技援疆项目为推广应用示范基地,通过二者的有机结合和示范应用,实现了对新疆地区城镇产业布局与决策支持系统的信息化和标准化管理..