A Copolymer of Benzoquinone and Pyrrole as High Rate, Durable Polymer Electrode for Aqueous Zn- and Mg-ion Based Batteries

S Sampath; Gargi Dey; Adil Fayaz; Risana M Jasmin; Sruthymol Dinesan

doi:10.1002/asia.202401135

A Copolymer of Benzoquinone and Pyrrole as High Rate, Durable Polymer Electrode for Aqueous Zn- and Mg-ion Based Batteries

Chem Asian J. 2025 Jan 8:e202401135. doi: 10.1002/asia.202401135. Online ahead of print.

Authors

S Sampath¹, Gargi Dey², Adil Fayaz², Risana M Jasmin², Sruthymol Dinesan²

Affiliations

¹ Indian Institute of Science, Inorganic and Physical Chemistry, IPC Department, IISc, 560012, Bangalore, INDIA.
² Indian Institute of Science, Inorganic and Physical Chemistry, INDIA.

PMID: 39778024
DOI: 10.1002/asia.202401135

Abstract

The growing energy demands have led to an increased attention towards the development of efficient energy storage devices. In this direction, aqueous rechargeable batteries have attracted considerable attention due to their affordability, environmental friendliness and quite importantly, safety. In the present studies, a two-dimensional copolymer of benzoquinone and pyrrole that is insoluble in aqueous solutions is explored as an electrode for aqueous, rechargeable divalent ion storage. The polymer exhibits high capacity, long cycle life and lends itself amenable for high rates of discharge / charge. It reveals a stable capacity of 125 mAh/g at a high current density of 1A/g and 77 mAh/g at 10 A/g for more than 20000 cycles in the case of zinc ion batteries. The aqueous magnesium ion battery show a stable capacity of 75 mAh/g at 1A/g current rate for 1000 cycles. Electrochemical studies reveal contributions due to capacitive storage of the 2-dimensional polymer. The charge storage mechanism due to the involvement of carbonyl groups is deciphered using spectroscopic techniques.

Keywords: Quinone-pyrrole polymer; aqueous battery; cycle life; divalent ion storage; rate capability.