Abstract
Zinc is widely used as a negative electrode material for batteries due to its excellent electrochemical properties. Zinc is prone to corrosion and the formation of zinc dendrites cause short circuits of the battery, which leads to reduced battery capacity and shortens the battery’s life, hindering its use in weak acidic electrolytes (for example, aqueous Zn-polyaniline batteries). The effects of carboxylates (sodium formate, sodium acetate, sodium propionate, sodium butyrate, sodium valerate, disodium malonate, and disodium succinate) and their concentrations on zinc electrode performance were studied with electrochemical methods to improve the zinc electrode activity for long-life Zn-polyaniline batteries. It was found that the ability of inhibiting corrosion of the zinc electrode is better in the aqueous electrolyte containing 0.2 M disodium malonate. The charge/discharge performance of a Zn-polyaniline battery electrodeposited with polyaniline on a carbon substrate is carried out in the aqueous electrolyte. the results show that the initial discharge specific capacity of the polyaniline in the Zn-polyaniline battery is as high as 131.1 mAh·g−1, and maintains a discharge specific capacity of 114.8 mAh·g−1 and a coulombic efficiency over 92% after 100 cycles at a charge/discharge current density of 1 A·g−1 in the voltage range of 1.5–0.7 V.
Highlights
In recent years, the role of zinc in the field of science and technology has been a subject of intense research [1,2]
The results show that the new electrolyte can effectively eliminate the hydrogen evolution corrosion of the zinc electrode and improve the discharge capacity and the cycle life of Zn/PANI secondary batteries
The result is consistent with that electrolyte containing 0.2 M disodium malonate is good to inhibit the corrosion of the zinc sheet
Summary
The role of zinc in the field of science and technology has been a subject of intense research [1,2]. The excellent performances of zinc and PANI have inspired the interest in their use as electrode materials of electrochemical power sources. The aqueous Zn-PANI secondary battery based on the abundant and cheap metal (Zn) as negative electrodes, safe and nontoxic conducting polymers (polyaniline) as the positive electrodes, and clean and non-polluting aqueous-based electrolytes, have the potential to accomplish most of the three. The results show that the new electrolyte can effectively eliminate the hydrogen evolution corrosion of the zinc electrode and improve the discharge capacity and the cycle life of Zn/PANI secondary batteries
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
