Aqueous zinc-organic polymer battery with a high rate performance and long lifetime
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Häupler, Bernhard; Rössel, Carsten; Schwenke, Almut M; Winsberg, Jan; Schmidt, Daniel; Wild, Andreas; Schubert, Ulrich S.
- Abstract:
- novel redox-active polymer based on a 9,10-di(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene (exTTF) system in combination
with a conjugated backbone was synthesized via rhodium (Rh)-catalyzed polymerization of 2-ethynyl(exTTF), leading to polymers
with low polydispersities. Composite electrodes containing this polymer exhibited chemically reversible two-electron oxidation in
aqueous media. The application of these electrodes as active cathode materials in hybrid zinc-organic batteries using an
aqueous electrolyte enabled the production of air-stable charge storage systems with a theoretical capacity of 133 mAh g.
These batteries featured high performance, charge/discharge rates of up to 120 C (30 s) and an ultra-long lifetime, of over
10 000 charge/discharge cycles (accompanied by a minor capacity loss of 14%). Finally, the polymer was compared with its
nonconjugated derivative, revealing the positive in
fluence of the conjugated backbone on the material activity owing to improved
electron transfer within the polymer chain.
- Research areas:
- Year:
- 2016
- Type of Publication:
- Article
- DOI:
- 10.1038/am.2016.82