Gel-combustion synthesis of LiFePO4/C composite with improved capacity retention in aerated aqueous electrolyte solution

► Gel combustion route was used to prepare LiFePO4/C composite with high carbon content ► Theoretical discharge capacity was achieved in non-aqueous medium at rate 0.1 C ► Best so far reported capacity retention in aqueous electrolyte was achieved ► Thick C shell seems to be of crucial importance for LiFePO4 in aqueous media.