conducting polymer composite 

https://doi.org/10.1351/goldbook.CT07201
Electrically-conducting composite comprising a non-conducting polymer matrix and an electrically-conducting material.
Note:
Examples of the electrically-conducting materials are carbon black and metal particles.
Source:
PAC, 2006, 78, 2067. (Terminology of polymers containing ionizable or ionic groups and of polymers containing ions (IUPAC Recommendations 2006)) on page 2069 [Terms] [Paper]