▎ 摘　　要

NOVELTY - Polymer-based positive temperature coefficient thermistor composite material comprises polymer matrix and conductive agent at mass ratio of 1:40-1:1. USE - Polymer-based positive temperature coefficient thermistor composite material for a lithium ion battery (all claimed). ADVANTAGE - The polymer-based positive temperature coefficient thermistor composite material provides lithium-ion battery having excellent safety. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a PPTC electrode, which comprises the composite material; and (2) a lithium ion battery, which comprises the PPTC electrode.