▎ 摘　　要

NOVELTY - Polymer-based conductive composite material comprises polymer substrate and conductive filler with a graphene-like two-dimensional layered structure having with an average particle size of 0.1-20 μm, and a particle size distribution range of 0.01-100 μm. The volume fraction of the polymer-based conductive composite material is 20-75 wt.%. The volume resistivity is not more than 1×10-3 Ω/cm accounting for 25-80% of the volume fraction of the polymer-based conductive composite material dispersed in the polymer matrix. The molecular formula of the conductive filler with layered structure is Mn+1Xn, where the M element is the transition metal elements i.e. scandium, titanium, vanadium, chromium, zirconium, niobium, molybdenum or hafnium and the X element is carbon or nitrogen element. USE - Used as polymer-based conductive composite material. ADVANTAGE - The material has low room temperature resistivity, outstanding weather resistance and good processability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing over-current protection chip. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of an over-current protection chip. 11Polymer-based conductive composite material layer 12Metal electrode foils 13Metal pins