Ti/IrO2–SnO2–Ta2O5　was　prepared　by　thermal　decomposition.　The　phase　structure,　surface　morphology　and　capacitive　properties　of　the　electrodes　annealed　at　different　temperatures　were　analyzed　in　detail.　The　electrodes　annealed　at　370　°C　had　the　largest　area　of　the　cyclic　voltammogram,　the　smallest　Zim,　the　minimum　relaxation　time,　and　the　largest　specific　capacitance　of　382.9　F/g,　which　was　lager　than　those　of　IrO2–SnO2　and　IrO2–Ta2O5.　The　conductive　nanocrystalline　particles　was　homogeneously　distributed　in　the　amorphous　matrix,　which　could　greatly　improve　the　conductivity　of　electrons　in　coatings,　but　it　did　not　sacrifice　the　conductivity　of　protons.　Ti/IrO2–SnO2–Ta2O5　electrodes　prepared　at　370　°C　and　Ti/RuO2–NiO　electrode　prepared　in　the　same　way　were　assembled　to　be　a　supercapacitor,　which　provided　energy　density　of　12.8wh　kg−1　and　1.86wh　kg−1　respectively　and　the　power　density　of　29w　kg−1　and　252.7w　kg−1.　The　energy　density　and　power　density　in　acidic　solution　could　be　detected　without　using　binder　materials.　The　prepared　method　was　simple,　economical　and　did　not　require　binder　which　provided　a　possibility　for　the　large-scale　industrial　production　of　pseudocapacitor.　©　2020　Elsevier　Ltd　and　Techna　Group　S.r.l.