Studies of Zn-poly(aniline-co-5-aminosalicylic acid) Aqueous Battery with Graphite Paper Current Collector

Abstract

Zn-PANI aqueous electrolyte secondary batteries have many advantages, such as low price and free of pollution, but some shortcomings still exist, for example, over-charge electrochemical degradation of the PANI, Zn passivation and Zn dendrite, especially current collector of PANI electrode is corroded easily. So far, how to overcome the many inherent questions of Zn-PANI secondary batteries is still a hot topic. Herein, an efficient strategy is proposed by increasing the electroactivity of current collector by potentiostatic deposition of poly (aniline-co-5-aminosalicylic acid) (PAASA) on graphite paper (PG, an excellent corrosion-resistant, low-cost, good conductivity, soft, elastic and light material) for collecting current. To study the electroactivity of the PAASA, cyclic voltammograms and electrochemical impedance spectra of PAASA cathode and Zn anode are measured in aqueous solution containing NH 4 Cl and ZnCl 2 . The electrochemical performances show that the specific capacity of the Zn-PAASA aqueous battery is 145 mAh g -1 , which is far beyond that conventional Zn-PANI aqueous batteries under the same conditions, and retains 95 mAh g -1 of the capacity after 150 cycles. Thus, the Zn-PAASA secondary batteries may become the next generation of high-performance battery by further research.

Highly Water-Soluble 6-Quinoxalinecarboxylic Acid for High-Voltage Aqueous Organic Redox Flow Batteries

“…The electrochemical performances of the 6-QCA anolyte in alkaline AORFBs were experimentally investigated by coupling with K 4 Fe­(CN) 6 catholyte. For improving the redox kinetics, carbon papers with relatively large specific surface areas were used as the current collectors in both anodic and cathodic cell compartments. , To avoid the corrosion of the flow cell at an ultrahigh concentration of KOH solution, a supporting solution of 3.0 M KOH was employed for the tests of alkaline AORFBs . Typically, the flow battery tests were conducted by using 20 mL of 0.2 M 6-QCA in 3.0 M KOH solution as the anolyte and 30 mL of 0.4 M K 4 Fe­(CN) 6 in 1.0 M KOH solution as the catholyte, if not otherwise stated.…”

A Highly Electroactive Poly(aniline-co-thionine) for Rechargeable Zinc Batteries

“…By contrast, at pH > 4.0, polyaniline easily loses its electrochemical activity, which severely restricts its applications. 17,18 Research in recent years has documented that the aniline copolymers could enhance the electrochemical activity at a higher pH condition. 19 Consequently, copolymerization of aniline with phenothiazine derivatives has been largely applied to improve the electroactivity of more aniline copolymers.…”