Polymer/zinc hybrid-flow battery using block copolymer micelles featuring a TEMPO corona as catholyte
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Winsberg, Jan; Münch, Simon; Hagemann, Tino; Morgenstern, Sabine; Janoschka, Tobias; Billing, Mark; Schacher, Felix H.; Hauffman, Guillaume; Gohy, Jean-François; Höppener, Stephanie; Hager, Martin D.; Schubert, Ulrich S.
- 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.
- Research areas:
- Year:
- 2016
- Type of Publication:
- Article
- Journal:
- Polymer Chemistry
- Volume:
- 7
- Pages:
- 1711 - 1718
- DOI:
- 10.1039/C5PY02036K