NEGATIVE ELECTRODE, SECONDARY BATTERY AND DEVICE COMPRISING SAME

The present application discloses a negative electrode, a secondary battery (5) and a device comprising the same. The negative electrode includes: a current collector (521); a first active material layer (522) close to the current collector (521), the first active material layer (522) including a first active material; and a second active material layer (523) disposed on a surface of the first active material layer (522) away from the current collector (521), the second active material layer (523) including a second active material; wherein the first active material and the second active material are independently oval-like particles with through holes and/or blind holes, and the first active material has an average pore size greater than that of the second active material.