Pitch-type superfine carbon fiber, manufacturing method thereof, non-aqueous electrolyte secondary battery using the pitch-type superfine carbon fiber, and non-aqueous electrolyte secondary battery having the negative electrode for the non-aqueous electrolyte secondary battery

摘要

According to the present invention, the ratio of the amount of CO bonds derived from the O1s orbitals and the amount of C = O bonds (molar ratio) measured by X-ray photoelectron spectroscopy, with an average fiber diameter of 100 nm or more and less than 700 nm and an average fiber length of 10 m or more, Is a carbon-carbon bond CO bond C = O bond.