Hybrid electrodes based on polyoxometalate-carbon materials for electrochemical supercapacitors

► First hybrid activated carbon/polyoxometalate as electrode for supercapacitor ► 29% improved cell capacity of the hybrid vs AC (up to 183 F g− 1 per electrode) ► Long term stability/cyclability: 9% capacity decrease after 8000 cycles, 1.6 A g− 1 ► Complex materials by simple methods to get synergic properties in supercapacitors