This work shows that newly developed primed aluminum current collector for positive electrodes allows to vastly improve the electrochemical performance compared to bare aluminum foil for full cells assembled with a C-coated LiFePO4 positive electrode, a graphite negative electrode and a standard carbonate/LiPF6 based electrolyte. Moreover, it is discovered that using a primed collector allows to drastically reduce the carbon additive content in the C-LiFePO4 electrode down to zero, while maintaining a very low impedance and excellent rate capability (80 mAh/g at 5C rate) and cyclability (60% capacity retention after 200 cycles at 2C rate). Comparatively, the same electrode shows no cyclability in the same testing conditions if a bare aluminum foil is used as the collector. Improving the energy density while maintaining good power capability of a Li-ion cell was thus achieved by using an adapted primed current collector. Such performance originates from a significant reduction of the contact resistance at the current collector – electrode interface through the multiplication of electrical contact points and/or the modification of their nature. In complement, this work shows that the carbon coating of the C-LiFePO4 particles is sufficient to ensure a good electrical conductivity within the electrode.