Method for large-area representation of graphite/silicon/amorphous carbon composite structure silicon-carbon cathode powder body
The invention discloses a method for large-area representation of a graphite/silicon/amorphous carbon composite structure silicon-carbon cathode powder body. The method comprises the following steps: placing the graphite/silicon/amorphous carbon composite structure silicon-carbon cathode powder body in the middle of a glass sheet with two flat surfaces, and compacting and flattening the powder body; testing the powder body with a laser Raman spectrometer, adjusting the peak of an obtained common Raman single spectrum to appear at positions near to 520 cm , 1,350 cm and 1,590 cm , and obtaining a test condition; obtaining a Raman imaging spectrum according to the test condition; respectively forming Raman imaged pictures for the intensities of a silicon peak, a carbon D peak and a carbon G peak, respectively imaging a ratio of the carbon D peak to the carbon G peak and a ratio of the carbon G peak to the carbon D peak, and judging whether the components and the structures in the powder body are consistent. The representation method disclosed by the invention is simple and quick, and can realize large-area representation of the distribution of silicon-carbon cathode components and research the structure consistency, so that the method has extremely high application prospect.