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。     

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。     

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。     

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.     

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.     

锂离子电池正极材料LiNi1/3 Co1/3 Mn1/3O2的研究进展

介绍了锂离子电池正极材料LiNi1/3Co1/3Mn1/3O2的结构,综述了LiNi1/3Co1/3Mn1/3O2的正极材料制备与改性及其电化学性能研究,并对其应用前景进行了展望.     

氢氧化物共沉淀法合成LiNi_(0.4)Co_(0.2)Mn_(0.4)O_2及其性能研究

以氢氧化物共沉淀法合成了Ni0.4Co0.2Mn0.4(OH)2前驱体,然后以Ni0.4Co0.2Mn0.4(OH)2和LiOH为原料,合成出了层状结构的锂离子电池正极材料LiNi0.4Co0.2Mn0.4O2.通过XRD、SEM和电化学测试对LiNi0.4Co0.2Mn0.4O2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12h合成的样品粒度大小分布比较均匀,以0.2C充放电,其首次放电容量为148mAh·g-1,循环30次后容量为136mAh·g-1.