▎ 摘　　要

NOVELTY - Negative active material (10) comprises silicon particles and an additive (120), where the additive comprises first and second polymers (121) covalently bonded to each other between the silicon particles, and a surfactant (123) added between the first and second polymers (122). USE - Negative active material for use in electrode (claimed), that is used for negative electrode of a next-generation secondary battery such as a lithium battery. ADVANTAGE - The electrode has capable of maintaining high lifespan stability while improving an electric capacity retention rate, i.e., lifespan. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for manufacturing an electrode which involves adding surfactant, preparing a solute by dry mixing silicon particles and an additive, preparing a solution by adding the solute to deionized water and wet mixing, coating the solution on a substrate, and drying the coated solution to form an electrode, where the additive is formed between first and second polymers covalently bonded to each other between the silicon particles. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of negative active material. Negative active material (10) Additive (120) First polymer (121) Second polymer (122) Surfactant (123)