CARBON LITHIUM ANODES FOR LITHIUM SECONDARY BATTERIES

For the development of a superior anode for practical lithium secondary batteries, the carbon-lithium composite anode has been studied. As a carbon material, the carbon fiber M46 was mainly studied in this study. This material was proved to be highly reversible in comparison with other carbon materials. It is shown that lithium ions and/or solvated lithium ions intercalate into the fiber by using the X-ray diffraction (XRD) method and X-ray photospectroscopy (XPS) measurement. Coupled with the Cr3O8 cathode, a coin-type cell was constructed. Over 170 cycles were possible when the M46 carbon-lithium composite anode was used, whereas with the bare lithium metal anode only 80 cycles were observed. From the observation of scanning electron micrographs (SEM), it is shown that the carbon fiber prevents the formation of dendritic lithium metal.