S1 Supplementary Information Co-Doped Electrochemically Exfoliated Graphene/Polymer Nanocomposites with High Dielectric Constant and Low Dielectric Loss for Flexible Dielectrics and Charge Storage Ali Shayesteh Zeraati, Farbod Sharif, Ehsan Aliabadian, Edward PL Roberts, Uttandaraman Sundararaj* Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, Canada T2N 1N4 *Corresponding Author’ Email: u.sundararaj@ucalgary.ca