ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
A Rocking-Chair Proton Battery with Conducting Redox Polymer Active Materials and a Protic Ionic Liquid Electrolyte.pdf (1.22 MB)

A Rocking-Chair Proton Battery with Conducting Redox Polymer Active Materials and a Protic Ionic Liquid Electrolyte

preprint
submitted on 15.12.2020, 12:27 and posted on 17.12.2020, 06:53 by huan Wang, Rikard Emanuelsson, Christoffer Karlsson, Patric Jannasch, Maria Strømme, Martin Sjödin

Rechargeable batteries that use redox-active organic compounds are currently considered as an energy storage technology for the future. Conducting redox polymers (CRPs) are organic materials being both electronically conducting and resilient to dissolution. While insolubility is an advantageous property for active battery materials, it complicates the processing necessary for fabricating electrodes, including electrode formulation and layer formation. Here we employ a post-deposition electro-polymerization (PDP) method, which allows for solution-processing to be used for electrode layer formation. The polymerization conditions are optimized and the underlying mechanism is studied with the final aim to produce high performance CRPs as energy storage materials. We show that quinizarin (Qz) and naphthoquinone (NQ) based CRPs can reach their theoretical capacity thorough optimization of the polymerization conditions. Combining the two CRPs, with the Qz-CRP as cathode and the NQ-CRP as anode, and a protic ionic liquid electrolyte, yields a 0.8 V proton rocking-chair battery. The conducting additive-free all-organic proton battery exhibits a capacity of 62 mAh/g and a capacity retention of 80% after 500 cycles using rapid potentiostatic charging and galvanostatic discharge at 4.5 C.

History

Email Address of Submitting Author

huanwang2050@hotmail.com

Institution

Uppsala University

Country

Sweden

ORCID For Submitting Author

0000-0001-8819-9453

Declaration of Conflict of Interest

The authors declare no competing financial interest

Exports