Abstract: The present invention is to provide a negative electrode active material for nonaqueous secondary batteries, which prevents increase in negative electrode resistance and improves initial charge/discharge efficiency and the effect of preventing gas generation and which is excellent in cycle characteristics. The present invention relates to a negative electrode active material for nonaqueous secondary batteries, which comprises an active material (A) capable of occluding and releasing lithium ions and an organic compound (B), wherein the organic compound (B) has a basic group and a lithium ion-coordinating group, and has a specific structure (S).

Abstract: A method to prepare a negative electrode active material for a nonaqueous secondary battery is provided. The negative electrode active material comprises an active material (A) capable of occluding and releasing lithium ions and an organic compound (B), wherein the organic compound (B) is hardly soluble in a nonaqueous electrolytic solution, has a ?-conjugated structure, and has an electric conductivity at 25° C. of 0.1 S/cm or less. The method includes dissolving or dispersing the organic compound (B) in a solvent, mixing the active material (A) with the organic compound (B) in the solvent; and removing the solvent from the mixture of the active material (A) and the organic compound (B) by filtering or by heating to obtain the negative electrode material.

Abstract: The present invention is to provide a negative electrode active material for nonaqueous secondary batteries, which is useful in production of nonaqueous secondary batteries that have low initial irreversible capacity and little gas generation due to decomposition of nonaqueous electrolytic solution, and have excellent charge/discharge cycle stability. The present invention relates to a negative electrode active material for nonaqueous secondary batteries, which comprises an active material (A) capable of occluding and releasing lithium ions and an organic compound (B), wherein the organic compound (B) is hardly soluble in a nonaqueous electrolytic solution, has a ?-conjugated structure, and has an electric conductivity at 25° C. of 0.1 S/cm or less.

Abstract: The present invention is to provide a negative electrode active material for nonaqueous secondary batteries, which prevents increase in negative electrode resistance and improves initial charge/discharge efficiency and the effect of preventing gas generation and which is excellent in cycle characteristics. The present invention relates to a negative electrode active material for nonaqueous secondary batteries, which comprises an active material (A) capable of occluding and releasing lithium ions and an organic compound (B), wherein the organic compound (B) has a basic group and a lithium ion-coordinating group, and has a specific structure (S).