Covalent vs. non-covalent redox functionalization of C-LiFePO4 based electrodes

► We functionalize fast redox molecular relay on carbon additive and C-LiFePO4. ► We correlate FTIR, XPS, elemental analysis, dc conductivity and electrochemistry. ► Conductivity is more impacted by covalent molecular grafting than by non-covalent. ► Simultaneous anion and cation based electrochemical processes occur. ► π-π stacking redox grafting does not show adverse effect on Li insertion in C-LiFePO4.