Synthesis and Characterization of a Phthalimide‐Containing Redox‐Active Polymer for High‐Voltage Polymer‐Based Redox‐Flow Batteries

Winsberg, Jan; Benndorf, Stefan; Wild, Andreas; Hager, Martin D.; Schubert, Ulrich S.

Abstract:

A phthalimide‐containing redox‐active polymer is designed and synthesized in particular for the application in all‐organic redox‐flow batteries. 4‐Vinylbenzyl phthalimide is prepared in a one‐step reaction and copolymerized with a solubility promoting comonomer. The novel polymer is electrochemically characterized in various electrolytes via cyclic voltammetry and features a quasireversible reduction reaction at E0½ = −1.89 V versus AgNO3/Ag. Afterward, the polymer is applied as anode‐active material in a first preliminary battery test in combination with a 2,2,6,6‐tetramethylpiperdinyl‐N‐oxyl‐containing polymer as cathode‐active material and a porous membrane as separator, yielding a polymer‐based all‐organic battery system with a high cell voltage of 2.0 V.

Research areas:

• Polymer Batteries

Year:

2018

Type of Publication:

Article

Journal:

Macromolecular Chemistry and Physics

Volume:

219

Pages:

1700267

DOI:

https://doi.org/10.1002/macp.201700267