| abstract |
This invention relates to a carbon powder which is characterized by including one or more than two kinds of sulfur, nitrogen, boron, phosphorus, and fluorine in the amount of 0.1-2 weight percent and 1-20 weight percent of oxygen to enhance the adhesive strength and electrophoretic nature to the electrode. The battery added with the secondary battery activator comprising this surface modified carbon powder or powder with this surface modified carbon, has a long cell life, and when this carbon powder is added, the second battery, which can no longer be chargeable/dischargeable can be also regenerated. |