Patent ID: 8765093
Filing Date: 2014-07-01
Classification: C01B

Abstract:
1. An expanded graphite sheet characterized in that impurities of the expanded graphite sheet include Al, B, Be, Ca, Cu, Fe, K, Li, Mg, Na, Ni, S, Si, Ti, V, and Zn; the amounts of the Al, the B, the Be, the Ca, the Cu, the Fe, the Li, the Mg, the Ni, the S, the Ti, the V, and the Zn are determined by an ICP emission spectroscopy method; the amounts of the K and the Na are determined by an atomic absorption spectrometry method; the amount of the Si is determined by an absorption spectrophotometry method; the amount of the Al is less than 0.08 mass ppm; the amount of the B is less than 0.1 mass ppm; the amount of the Be is less than 0.02 mass ppm; the amount of the Ca is less than 0.04 mass ppm; the amount of the Cu is less than 0.08 mass ppm; the amount of the Fe is less than 0.04 mass ppm; the amount of the K is less than 0.1 mass ppm; the amount of the Li is less than 0.01 mass ppm; the amount of the Mg is less than 0.02 mass ppm; the amount of the Na is less than 0.05 mass ppm; the amount of the Ni is less than 0.1 mass ppm; the amount of the S is less than 1.0 mass ppm; the amount of the Si is less than 0.1 mass ppm; the amount of the Ti is less than 0.09 mass ppm; the amount of the V is less than 0.07 mass ppm; and the amount of the Zn is less than 0.1 mass ppm.