▎ 摘　　要

NOVELTY - Negative electrode comprises a negative electrode current collector and an anode active material layer formed on the anode current collector, where the anode active material layer comprises a silicon-based active material and a carbon-based active material. The ratio of the average particle diameter (D50) of the carbon-based active material to the average particle diameter (D50) of the silicon-based active material is 2-8, and the electrode has a porosity of 48-62%. USE - The negative electrode is useful in a secondary battery, preferably a lithium secondary battery, and electronic devices using batteries, such as mobile phones, notebook computers, electric vehicles, a hybrid electric vehicle and a power storage device. ADVANTAGE - The electrode improves output performance and energy density, porosity, improved accuracy, electrical contact, high reproducibility, high resolution, strength, electrolyte performance, high output and large capacity, prevents deterioration in lifespan characteristics due to volume expansion/contraction during charging and discharging, improves lifespan characteristics, prevents side reactions with electrolyte, and reduces overall degree of volume expansion of negative electrode. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a secondary battery.