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首页> 外文会议>International Advanced Automotive Battery Conference(AABC) and Ultracapacitor Conference; 20070515-18; Long Beach,CA(US) >Structural Change Studies of Cathode Materials in Lithium Batteries Relating to the Thermal Stability Using Synchrotron- Based X-Ray Techniques
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Structural Change Studies of Cathode Materials in Lithium Batteries Relating to the Thermal Stability Using Synchrotron- Based X-Ray Techniques

机译：基于同步加速器的X射线技术研究锂电池正极材料的结构变化与热稳定性的关系

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摘要

Various synchrotron-based X-ray techniques have been developed and applied to investigate many important issues in Li rechargeable battery systems at BNL. The structural changes of the cathode materials under thermal abuse conditions and the interaction between cathode and electrolyte are very important in understanding the safety related characteristics. Unfortunately, most of the temperature dependent diffraction studies of the structure of the charged electrodes have been performed in the absence of electrolyte/solvents. In order to understand the mechanism of thermal degradation of the electrodes in Li-ion cells, it is very important to monitor the structural changes of the charged cathode material during heating in the presence of electrolyte. We have developed a technique using the combination of a high intensity synchrotron x-ray beam and a fast image plate detector to do time resolved x-ray diffraction during the thermal decomposition of charged cathode materials in the presence of electrolyte. In this paper, we report the results of our studies in monitoring the structural changes of the charged cathode material in the presence of electrolyte using time resolved x-ray diffraction (XRD).
机译：已经开发了多种基于同步加速器的X射线技术，并将其用于调查BNL锂可充电电池系统中的许多重要问题。阴极材料在热滥用条件下的结构变化以及阴极与电解质之间的相互作用对于理解与安全相关的特性非常重要。不幸的是，带电电极结构的大多数与温度有关的衍射研究都是在没有电解质/溶剂的情况下进行的。为了理解锂离子电池中电极的热降解机理，监测带电阴极材料在有电解质存在的加热过程中的结构变化非常重要。我们已经开发出一种技术，该技术结合了高强度同步加速器X射线束和快速成像板检测器，可在存在电解质的情况下对带电阴极材料进行热分解期间进行时间分辨X射线衍射。在本文中，我们报告了使用时间分辨X射线衍射（XRD）监测存在电解质时带电阴极材料的结构变化的研究结果。

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