Investigation of Voltage Range and Self-Discharge in Aqueous Zinc-Ion Hybrid Supercapacitors.

ABSTRACT: Aqueous zinc-ion hybrid supercapacitors are a promising energy storage technology, owing to their high safety, low cost, and long-term stability. At present, however, there is a lack of understanding of the potential window and self-discharge of this aqueous energy storage technology. This study concerns a systematic investigation of the potential window of this device by cyclic voltammetry and galvanostatic charge-discharge. Hybrid supercapacitors based on commercial activated carbon (AC) demonstrate a wide and stable potential window (0.2 V to 1.8 V), high specific capacitances (308 F g^-1 at 0.5 A g^-1 and 110 F g^-1 at 30 A g^-1 ), good cycling stability (10000 cycles with 95.1 % capacitance retention), and a high energy density (104.8 Wh kg

SUBMITTER: Yang J 

PROVIDER: S-EPMC8048863 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature