Issue 9, 2016

Polymer/zinc hybrid-flow battery using block copolymer micelles featuring a TEMPO corona as catholyte

Abstract

A well-defined block copolymer was applied in a semi-organic polymer hybrid-flow battery (pHFB). A 2,2,6,6-tetramethylpiperidinyl-N-oxyl (TEMPO) containing polymer was utilised as cathode active material. Micellar structures of the active material were achieved by utilising a diblock copolymer composed of a polar poly(TEMPO methacrylate) (PTMA) and an unpolar poly(styrene) (PS) block, which enables the formation of core-corona micelles in organic carbonates. The synthesised PTMA-b-PS was electrochemically investigated and subsequently utilised as catholyte in polymer/Zn pHFBs. The constructed flow batteries feature an excellent cycling stability of 1000 consecutive charge/discharge cycles with 95% retention of initial discharge capacity and a stable voltage range of 2 V. Further, the charging process leads to slight changes in the micellar structure combined with an increased solubility.

Graphical abstract: Polymer/zinc hybrid-flow battery using block copolymer micelles featuring a TEMPO corona as catholyte

Supplementary files

Article information

Article type
Paper
Submitted
22 Dec 2015
Accepted
18 Jan 2016
First published
19 Jan 2016

Polym. Chem., 2016,7, 1711-1718

Polymer/zinc hybrid-flow battery using block copolymer micelles featuring a TEMPO corona as catholyte

J. Winsberg, S. Muench, T. Hagemann, S. Morgenstern, T. Janoschka, M. Billing, F. H. Schacher, G. Hauffman, J. Gohy, S. Hoeppener, M. D. Hager and U. S. Schubert, Polym. Chem., 2016, 7, 1711 DOI: 10.1039/C5PY02036K

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