Zn2+ insertion/extraction and dual‐ion mechanisms are combined in aqueous Zn/polyaniline (Zn/PANI) batteries. Such Zn/PANI batteries exhibit excellent electrochemical performance, especially a long cycle life over 3000 cycles with high‐capacity retention of 92%. Furthermore, quasi‐solid‐state soft‐packaged and cable‐type Zn/PANI batteries are assembled. They display stable performance even under different bending states.
Abstract
Aqueous zinc‐ion batteries have been considered as potential energy storage devices owing to their high safety and low cost. Traditional zinc‐ion batteries often implement a typical Zn2+ insertion/extraction mechanism. Compared with traditional Zn2+ insertion/extraction mechanism, supercapacitor‐liked dual‐ion mechanism often endow the batteries with higher operating voltage, better rate capability, and longer cycle life. Herein, aqueous Zn/polyaniline batteries are developed, which can combine the Zn2+ insertion/extraction and dual‐ion mechanisms. The Zn/polyaniline batteries deliver excellent electrochemical performance, especially a long cycle life up to 3000 cycles with high‐capacity retention of 92%. This hybrid mechanism provides a promising battery chemistry. Furthermore, Zn/polyaniline batteries can be assembled into quasi‐solid‐state soft‐packaged and cable‐type configurations and display stable electrochemical performance even under different bending states, showing potential applications for flexible electronics.
