In-situ Spectroscopic and Structural Studies of Electrode Materials for Advanced Battery Applications

Daniel A Scherson

关键词: in situ spectroscopy;    lithium metal;    surface science;    cathode;    anode;    Raman spectroscopy;    X-ray absorption spectroscopy;   

DOI  :  10.2172/1068552
RP-ID  :  Final Report
PID  :  OSTI ID: 1068552

学科分类：能源（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Techniques have been developed and implemented to gain insight into fundamental factors that affect the performance of electrodes in Li and Li-ion batteries and other energy storage devices. These include experimental strategies for monitoring the Raman scattering spectra of single microparticles of carbon and transition metal oxides as a function of their state of charge. Measurements were performed in electrolytes of direct relevance to Li and Li-Ion batteries both in the static and dynamic modes. In addition, novel strategies were devised for performing conventional experiments in ultrahigh vacuum environments under conditions which eliminate effects associated with presence of impurities, using ultrapure electrolytes, both of the polymeric and ionic liquid type that display no measurable vapor pressure. Also examined was the reactivity of conventional non aqueous solvent toward ultrapure Li films as monitored in ultrahigh vacuum with external reflection Fourier transform infrared spectroscopy. Also pursued were efforts toward developing applying Raman-scattering for monitoring the flow of charge of a real Li ion battery. Such time-resolved, spatially-resolved measurements are key to validating the results of theoretical simulations involving real electrode structures.