Ti/Ru0.4Sn(0.6-x)MnxO2　electrodes　(x=0,　0.3,　0.6)　were　prepared　by　thermal　decomposition　method.　The　microstructure,　morphology　and　capacitive　properties　of　the　as-prepared　electrodes　were　investigated　by　XRD,　SEM,　CV,　EIS　and　constant　current　charge-discharge.　The　results　show　that　adding　SnO2　into　the　ternary　electrodes　materials　can　inhibit　the　precipitation　of　RuO2　on　surface　and　is　beneficial　to　form　the　Ru-Mn-Sn-O　solid　solution　oxide,　and　MnO2　can　suppress　the　crystallinity　of　RuO2.　So,　the　interaction　of　the　three　components　lead　to　the　decrease　of　the　ion　diffusion　resistance　and　the　improvement　of　the　charge　storage　ability　of　Ti/Ru0.4Mn(0.6-x)SnxO2　electrodes.　The　maximum　specific　capacitance　of　682　F/g　is　obtained　for　Ti/Ru0.4Mn0.3Sn0.3O2　electrode,　which　is　about　two　or　three　times　of　that　of　Ti/RuO2-SnO2　or　Ti/RuO2-MnO2　electrodes.　©　2016,　Central　South　University　of　Technology.　All　right　reserved.