Nowadays, lithium ion batteries (LIBs) have been widely used in portable electronic devices. However, there are many needs to improve power and energy density for LIB to meet the demands of applications in electric vehicles and energy storage systems. Surface modification, especially surface coating, is one of the effective methods to improve the electrode performance in LIB. Many studies have been reported on advantages of surface coating on single particle level. Nevertheless, the decrease in the tap density and the complex manufacturing conditions can be problematic for a particle-scale coating. Here, we report a facile synthesis of conformal thin-layered conducting poly(3,4-ethylenedioxythiophene) (PEDOT) via vapor reacting printing (VRP) on prepared electrodes. A positive electrode based on micron-sized LiFePO₄ (LFP) was used to highlight the improvements in the electrical and ionic conductivity by conductive coating.