Composite particles for negative electrodes of secondary batteries, use of same, method for producing same, and binder composition

A method for producing a secondary battery negative electrode comprising the steps of:

• supplying a powder consisting of a secondary battery negative electrode material onto a current collector to form a layer of the secondary battery negative electrode material, and
• pressing the layer to form an active material layer, wherein
• the secondary battery negative electrode material comprises a secondary battery negative electrode composite particle;
• the secondary battery negative electrode composite particle comprises a negative electrode active material and a particulate polymer;
• the particulate polymer includes 10% by weight to 60% by weight of a (meth)acrylonitrile monomer unit and 35% by weight to 85% by weight of an aliphatic conjugated diene monomer unit;
• a residual amount of an organic compound having an unsaturated bond and a boiling point of 150° C. to 300° C. is 500 ppm or less as a ratio relative to an amount of the particulate polymer;
• the ratio of an aromatic vinyl monomer unit in the particulate polymer is 1% by weight or less;
• and
• several to several tens of the negative electrode active materials are bound together by the particulate polymer to form one particle.