现代分析测试技术在磷酸铁锂中的应用  

Modern analysis and testing technology in lithium iron phosphate

作　　者：屠智革[1] 池波[1] 蒲健[1] 李箭[1] 

机构地区：[1]华中科技大学材料科学与工程学院,材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《功能材料》2011年第B04期193-196,201,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50902056)

摘　　要：磷酸铁锂有高的功率密度和能量密度,是一种极有应用前景的锂离子电池正极材料。借助于现代分析测试技术,了解磷酸铁锂的微观结构与组成,认知其微观状态与宏观性能之间的关系,最终实现认识与改造的目的。其中,X射线衍射分析提供磷酸铁锂的成分、分子结构及形态等信息;电子显微分析提供磷酸铁锂的组织、晶体结构和化学成分等信息;表面分析则用于对磷酸铁锂的元素组成进行定性、定量及价态的分析。光谱分析用于磷酸铁锂分子基团的定性鉴别和结构分析;电化学分析则用于检测其电化学性能。所述分析测试技术是现代分析测试技术中最为重要的部分,综述了这些技术在磷酸铁锂的研究应用方面所取得的成果及进展。Lithium iron phosphate with both high power and high energy density is a potential candidate for the cathode material of the lithium secondary batteries. The micro-structure and composition of lithium iron phosphate could be revealed by the modern analytical techniques to build the relationship between the micro-state and the macro-performance of this material and finally achieve the goal of the optimization of it. For example, the composition, the molecular structure and the morphology about lithium iron phosphate can be achieved by X-ray diffraction and the organization structure, the crystal structure, the composition and other information can he detected by electron microscopy analysis. Surface analysis is the method of qualitative, quantitative and valence variation analysis for the elemental composition in lithium iron phosphate. Spectral analysis can be used in the research of the qualitative identification and the structural for the molecular groups of lithium iron phosphate. Electrochemical analysis can be applied to detect the electrochemical properties of lithium iron phosphate. These analytical techniques are the most important part of the modern analytical techniques. The article reviews these relative analytical techniques and the current results about lithium iron phosphate.

关 键 词：磷酸铁锂 X射线衍射分析 电子显微镜分析 表面分析 光谱分析 电化学分析 

分 类 号：TM912.9[电气工程—电力电子与电力传动]