物理化学实验教学改革探析

针对物理化学实验教学的现状,论述了实验教学过程中的具体措施,通过改革传统的实验教学方法,在教学上取得了初步成效。     

PBl教学法在电化学工程专业化学电源工艺学教学中的应用

PBL教学法（problem-based learning,PBL）是以问题为基础,以学生为中心,培养学生自学能力,发展学生综合思考能力和解决实际问题能力的教学法。它强调学生同时发展高层次的思维方式、掌握知识基本概念和实践能力。本方法让学生面对的是实际状况下的问题,学生自己就是解决问题的主角。结合桂林工学院电化学工程专业化学电源工艺学课程教学的现状,文章探讨了如何利用PBL等教学法提高教学质量,提高电化学工程专业学生对本课程的学习兴趣。     

《物理化学》课程教学改革与探索

针对目前物理化学教学中存在的实际问题,从教学内容和教学方法两个方面对物理化学教学改革进行了探讨。在教学内容上注重课程内容的实用性、前沿性和趣味性;在教学方法上注重以学生为为主体,注重培养学生的科学思维方法和创造力。     

碳酸盐共沉淀法合成LiNi1/3Co1/3Mn1/3O2及其电化学性能

以碳酸盐共沉淀法合成了Ni1/3Co1/3Mn1/3CO3前驱体,然后以Ni1/3Co1/3Mn1/3CO3和LiOH·H2O为原料,合成出了层状锂离子电池正极材料Li Ni1/3Co1/3Mn1/3O2.通过XRD,SEM和电化学测试对Li Ni1/3Co1/3Mn1/3O2材料的结构、形貌及电化学性能进行了测试和表征.结果表明,800℃烧结12 h所合成的样品粒度大小分布比较均匀,以0.2 C充放电,其首次放电容量为153 mAh·g-1,循环30次后容量为140 mAh·g-1.     

金相组织图像智能分析技术研究

研究了使用相关金相组织图像智能分析技术来提取和重建金相组织的晶界。首先,概述了常用金相组织图像智能分析技术所包含的内容,并给出了研究思路和过程;然后,着重研究了金相组织图像智能分析技术中的图像预处理技术、晶界提取技术以及晶界重建技术,并结合实际金相组织图像,对相关技术进行了试验和优化;最后,所得试验结果表明,本研究对金相组织的晶界提取与重建有着较好的效果,具有一定的应用价值。     

基于VisualStudio2010的员工信息数据库设计和实现

根据公司实际需要,设计了一种基于Visual Studio 2010为设计平台,以Access为数据存储软件和以Excel为最终数据处理软件的新型人事管理系统。采用一种模块化的设计思想,所设计系统同时具有Visual Studio 2010、Access和Excel优点,并且能够独立操作,同时,稍作修改即可满足其他地方的使用。根据测试,所设计的管理系统功能强大、大大提高了公司的管理效率,满足了公司的需要。     

Preparation and electrochemical properties of Y-doped Li3V2（PO4）3 cathode materials for lithium batteries

Y-doped Li3V2(PO4)3 cathode materials were prepared by a carbothermal reduction(CTR) process. The properties of the Y-doped Li3V2(PO4)3 were investigated by X-ray diffraction (XRD) and electrochemical measurements. XRD studies showed that the Y-doped Li3V2(PO4)3 had the same monoclinic structure as the undoped Li3V2(PO4)3. The Y-doped Li3V2(PO4)3 samples were investigated on the Li extraction/insertion performances through charge/discharge, cyclic voltammogram (CV), and electrochemical impedance spectra (EIS). The optimal doping content of Y was x=0.03 in Li3V2-xYx(PO4)3 system. The Y-doped Li3V2(PO4)3 samples showed a better cyclic ability. The electrode reaction reversibility was enhanced, and the charge transfer resistance was decreased through the Y-doping. The improved electrochemical performances of the Y-doped Li3V2(PO4)3 cathode materials were attributed to the addition of Y3+ ion by stabilizing the monoclinic structure.     

盐酸肼还原次甲基蓝催化光度法测定痕量钼（VI）

基于在盐酸介质中，钼对次甲基兰与盐酸肼氧化还原反应的催化活性，建立了测定痕量钼新的动力学方法。其检出限为２．６２×１０＾１０ｇ／ｍＬ，线性范围０￣１．０μｇ／２５ｍＬ，可用于豆类、茶叶中钼中的测定。     

Synthesis and electrochemical performances of LiNi0.6Co0.2Mn0.2O2 cathode materials

LiNi_0.6Co_0.2Mn_0.2O₂ was prepared from LiOH·H₂O and MCO₃ (M=Ni, Co, Mn) by co-precipitation and subsequent heating. XRD, SEM and electrochemical measurements were used to examine the structure, morphology and electrochemical characteristics, respectively. LiNi_0.6Co_0.2Mn_0.2O₂ samples show excellent electrochemical performances. The optimum sintering temperature and sintering time are 850 °C and 20 h, respectively. The LiNi_0.6Co_0.2Mn_0.2O₂ shows the discharge capacity of 148 mA·h/g in the range of 3.0?4.3 V at the first cycle, and the discharge capacity remains 136 mA·h/g after 30 cycles. The carbonate co-precipitation method is suitable for the preparation of LiNi_0.6Co_0.2Mn_0.2O₂ cathode materials with good electrochemical performance for lithium ion batteries.