▎ 摘　　要

NOVELTY - Lead-acid battery comprises a negative electrode, a positive electrode and an electrolyte. The negative electrode and the positive electrode are coated with an active material on one surface. The active material comprises an organic fiber, a binder, and a carbon-based material, which is a mixture of multilayer graphene and graphite nanofibers in a weight ratio of 1:1. The multilayered graphene is a single layer of graphene stacked in 5-15 layers and has an oxygen content 1-20 wt.%, an average thickness 1-5 nm, a specific surface area 25-400 m/g, a lateral size is 1 mu m or more, an average diameter 7-40 nm, an aspect ratio 3000-4000, a resistance 10-3-0.23 Omega /cm, a tensile strength is 1-3 gpa and a density 1.8-2 g/m3. The active material is a lead acid battery, further comprises a mixture of barium sulfate, lignin, diatomaceous earth and calcium silicate. USE - Lead-acid battery. ADVANTAGE - The lead-acid battery has excellent electrical conductivity, durability and corrosion performance and improves charge/discharge cycle of the electrode and secures excellent economic efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing electrode plates which involves, preparing substrate containing lead; applying an active material paste comprising a carbon-based material, which is a mixture of multilayer graphene and graphite nanofibers, on the substrate, followed by compression molding; performing a first heat treatment in a dryer maintained at 20 degrees C for 1-5 hours after the compression molding; and performing a second heat treatment in a dryer maintained at 60-80 degrees C for 1-12 hours after performing the first heat treatment, where the active material paste further comprises other additives such as mixture of barium sulfate, lignin, diatomaceous earth and calcium silicate.