Energy storing bricks for stationary PEDOT supercapacitors

Hongmin Wang, Yifan Diao, Yang Lu, Haoru Yang, Qingjun Zhou, Kenneth Chrulski and Julio M. D’Arcy ()
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Hongmin Wang: Washington University in St. Louis
Yifan Diao: Washington University in St. Louis
Yang Lu: Washington University in St. Louis
Haoru Yang: Washington University in St. Louis
Qingjun Zhou: Washington University in St. Louis
Kenneth Chrulski: Washington University in St. Louis
Julio M. D’Arcy: Washington University in St. Louis

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Fired brick is a universal building material, produced by thousand-year-old technology, that throughout history has seldom served any other purpose. Here, we develop a scalable, cost-effective and versatile chemical synthesis using a fired brick to control oxidative radical polymerization and deposition of a nanofibrillar coating of the conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT). A fired brick’s open microstructure, mechanical robustness and ~8 wt% α-Fe2O3 content afford an ideal substrate for developing electrochemical PEDOT electrodes and stationary supercapacitors that readily stack into modules. Five-minute epoxy serves as a waterproof case enabling the operation of our supercapacitors while submerged underwater and a gel electrolyte extends cycling stability to 10,000 cycles with ~90% capacitance retention.

Date: 2020
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DOI: 10.1038/s41467-020-17708-1

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