Lithium Batteries for Electric Vehicles

该研究将涉及使用光学显微镜、核磁共振光谱、晶体学和电化学研究锂离子正极材料锂镍氧化物的高能和高功率锂电池用于电动汽车。要解决的具体问题包括在衰减过程中发生的一系列相变的性质，以及阳离子和电子排序在这些相变中的作用。局部结构方法，如x射线吸收光谱和核磁共振光谱将用于研究这些d-7材料中的Jahn-Teller有序作为温度的函数。从长远来看，掺杂（如W）对相变和Jahn-Teller有序的影响将被探索，以及可能的降解模式。

The study will involve the use of optical microscopy, NMR spectroscopy, and crystallographic and electrochemical studies of the lithium-ion cathode material lithium nickel oxide for high energy and high power lithium batteries for electric vehicles. The specific questions to be addressed include the nature of the series of phase transitions that occur on delithation and the role that cation and electronic ordering has on these phase transitions. Local structural methods such as X-ray absorption spectroscopy and NMR spectroscopy will be used to study the Jahn-Teller ordering in these d-7 materials as a function of temperature. In the longer term, the effect of doping such as W on phase transitions and Jahn-Teller ordering will be explored, as will possible degradation modes.