Binder effect on cycling performance of silicon/carbon composite anodes for lithium ion batteries

The cycling performance of a silicon/carbon composite anode has been significantly enhanced by using acrylic adhesive and modified acrylic adhesive as binder to fabricate the electrodes for lithium ion batteries. The capacity retentions of Si/C composite electrodes bound by acrylic adhesive and modified acrylic adhesive are 79% and 90% after 50 cycles, respectively. These two binders are electrochemically stable in the organic electrolyte in the working window. They also show larger adhesion strength between the coating and the Cu current collector as well as smaller solvent absorption in the electrolyte solvent than polyvinylidene fluoride (PVDF). Furthermore, sodium carboxyl methyl cellulose (CMC) plays an important role on improving the properties of acrylic adhesive, which increases the adhesive strength of acrylic adhesive and improves the activation of the electrodes.     

[(2Y-ZrO2)-Al2O3]纳米微粉制备的研究

本研究采用SoL-GeL法和自动引燃法制备[(2Y-ZrO)-AlO]超微粉,并进行了微观结构分析。为比对223两种超微粉性能的差异,采用注浆成型法制备样品,并分别测定抗折强度,断裂韧性和烧结温度。结果表明:自动引燃制备的ZrO-AlO掺稀土纳米微粉,工艺简单、细小均匀,由其烧造的样品较SoL-GeL法样品抗弯强度高,223断裂韧性好,烧结温度低。     

聚丙烯耐熔垂性能的改进

本文了共聚、共混、填充等技术改进聚丙烯耐熔垂性能的规律，并对改性后聚丙烯的力学性能进行了研究。     

Unique clay orientation in the injection-molded bar of isotactic polypropylene/clay nanocomposite

In this article, the injection-molded bars of isotactic polypropylene/organoclay nanocomposite with different clay contents have been obtained via dynamic packing injection molding (DPIM). The oriented microstructure including layered nanoparticles and PP lamellae has been inspected through 2D-WAXS analyses along the sample thickness of the molded bars. Depending on the clay content and sample thickness, various oriented clay structures with nanoparticles uniplanar-axially oriented parallel to the surface of molded bar, or partially tumbled around the flow axis of the molded bar, or even a random orientation, could be observed. The observed orientation behavior of nanoparticles could be temporarily elucidated as the results of the sensitive response of layered nanoparticles to shear deformation and the structural recovery of clay network assisted by the electrostatic attraction existing between adjacent nanoplatelets.     

脲类杀菌剂戊菌隆的合成

以对氯氯苄为原料，先与六甲基次胺进行胺化反应制得对氯苄胺；然后在Raney Ni催化剂存在下。在高压釜中与环戊酮进行缩合反应，同时加氢还原，得到N-对氯苄基-N-环戊胺；最后N-对氯苄基-N-环戊胺与苯基异氰酸酯在50℃的甲苯溶液中缩合，处理后得到戊菌隆。产品戊菌隆含量95％，以对氯氯苄计总收率67．3％。     

原位合成莫来石晶须及其微观结构的研究

本文通过以高岭土、工业氢氧化铝为原料,添加适量AlF3和V2O5,在高温下原位合成了莫来石晶须,采用扫描电镜（SEM）研究了合成的莫来石晶须的微观形貌,探讨了莫来石晶须的生长机理,并讨论了影响莫来石晶须生长的相关因素.在综合考虑影响莫来石晶须生长的相关因素后,制备出晶须多、长径比大、分布均匀的莫来石晶须样品.     

变压器油色谱分析与故障判断及处理

阐述变压器油气体色谱分析与变压器内部故障之间的内在联系，通过色谱分析监测变压器的运行状况，并介绍变压器油气体色谱超标在线脱气处理方法。     

有机玻璃的增韧研究

研究了不同聚合方法制备的聚丙烯酸丁酯（PBA）对浇铸型有机玻璃（PMMA）的增韧改性，研究结果表明，当PBA以纳米粒子簇分散在PMMA基体中时，对PMMA有较好的增韧改性效果。当PMMA中无皂乳液聚合PBA（e-PBA)的质量分数为0.5%时。改性PMMA的冲击强度比基体提高38%。SEM观察表明，本体聚合PBA（b-PBA)橡胶粒子以独特的纳米簇状结构均匀分布在PMMA基体中，大量的微裂纹以b-PBA粒子为中心呈放射状向外辐射，这些微裂纹在试样破坏的过程中吸收了大量的冲击能，使改性PMMA韧性得以提高。     

吉林西部碱尘气溶胶矿物与元素组成和来源研究

碱尘暴是一种特殊的尘暴类型,在全球范围内有着不同程度的分布.本文利用SEM-EDX和ICP对吉林西部两个采样点的碱尘气溶胶进行分析,获得了碱尘气溶胶样品的矿物组成和常量元素组成.结果表明样品矿物成份主要是石英(54.9%)和长石(28.3%),其次为碳酸盐(4.4%)和氯盐(2.7%)碱尘的金属元素以Ca,Na为主,含量排序为Ca,Na,Al,Fe,K,Mg,Ti;吉林西部碱尘气溶胶与普通沙尘气溶胶在矿物组成和元素分布上均有明显差别.大布苏湖碱尘矿物来源于湖盆阶地碎屑沉积物、粉砂粘土碎屑沉积物、湖盆边缘季节性结晶盐.Na元素主要来源于钠长石和食盐;Ca元素来源主要是钙长石、方解石和白云石.     

液相沉淀法制备纳米TiO2及其光催化性能的研究

提出了一种以TiSO₄为前驱体的制备锐钛矿型纳米TiO₂的液相沉淀法。通过控制适宜的制备条件，可将Ti^4+的初始浓度提高到15 mol·L^-1。以丙烯酰胺的光催化降解为模型反应，考察了所制备TiO₂的光催化活性。与萃取沉淀法制备的TiO₂和工业催化剂相比，该法制备的TiO₂不仅产率高，而且催化活性较好。