All-solid-state supercapacitors using a highly-conductive neutral gum electrolyte.

ABSTRACT: Recently, the development of safe, stable, and long-life supercapacitors has attracted considerable interest driven by the fast-growth of flexible wearable devices. Herein, we report an MnO₂-based symmetric all-solid-state supercapacitor, using a neutral gum electrolyte that was prepared by embedding aqueous sodium sulfate solution in a biopolymer xanthan gum. Resulting from the high ion conductivity 1.12 S m^-1, good water retention, and high structure adaption of such gum electrolyte, the presently described supercapacitor showed high electrochemical performance with a specific capacitance of 347 F g^-1 at 1 A g^-1 and an energy density of 24 μW h cm^-2 The flexible supercapacitor possesses excellent reliability and achieves a retaining

SUBMITTER: Yu N 

PROVIDER: S-EPMC9061702 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature