One‐step synthesis of CoSn(OH) ₆ nanocubes for high‐performance all solid‐state flexible supercapacitors

Abstract

Abstract CoSn(OH) 6 nanocubes were synthesized by a facile one‐step co‐precipitate method. Their supercapacitor performances were investigated via a traditional three‐electrode system and all solid‐state flexible asymmetric supercapacitor. The electrode shows a maximum specific capacitance up to 695 F·g −1 . The flexible all solid‐state asymmetric supercapacitor was fabricated based on CoSn(OH) 6 nanocubes and active carbon as positive and negative electrode. The assembled asymmetric supercapacitor exhibits a specific capacitance (97.3 mF·cm −2 ), good rate/mechanical stability and a long cycling stability (5000 cycles), demonstrating great promise for applications in all solid‐state flexible supercapacitors.