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Micellar Cathodes from Self-Assembled Nitroxide-Containing Block Copolymers in Battery Electrolytes

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Hauffman, Guillaume [UCL] Maguin, Quentin [UCL] Bourgeois, Jean-Pierre [UCL] Vlad, Alexandru [UCL] Gohy, Jean-François [UCL]

This contribution describes the synthesis of block copolymers containing electrochemically active blocks, their micellization, and finally their use as micellar cathodes in a lithium bat- tery. The self-assembly of the synthesized poly(styrene)-block-poly(2,2,6,6-tetramethylpi- peridinyloxy-4-yl methacrylate) (PS-b-PTMA) diblock copolymers is realized in a typical battery electrolyte made of 1 M lithium trifluoromethanesulfonate dissolved in a mixture of ethylene carbonate/diethyl carbonate/dimethyl carbonate(1:1:1, in volume). Dynamic light scattering and atomic force micro- scopy indicate the formation of well-defined spherical micelles with a PS core and a PTMA corona. The electrochemical prop- erties of those micelles are further investigated. Cyclic voltam- mograms show a reversible redox reaction at 3.6 V (vs Li+/Li). The charge/discharge profiles indicate a flat and reversible plateau around 3.6 V (vs Li+/Li). Finally, the cycling perfor- mances of the micellar cathodes are demonstrated. Such self-assembled block copolymers open new opportunities for nanostructured organic radical batteries.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès mixte
Publication date 2014
Language Anglais
Journal information "Macromolecular Rapid Communications" - Vol. 35, no.2, p. 228-233 (Janvier)
Peer reviewed yes
Publisher Wiley - V C H Verlag GmbH & Co. KGaA ((Germany) Weinheim)
issn 1022-1336
e-issn 1521-3927
Publication status Publié
Affiliation UCL - SST/IMCN/BSMA - Bio and soft matter
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Bibliographic reference Hauffman, Guillaume ; Maguin, Quentin ; Bourgeois, Jean-Pierre ; Vlad, Alexandru ; Gohy, Jean-François. Micellar Cathodes from Self-Assembled Nitroxide-Containing Block Copolymers in Battery Electrolytes. In: Macromolecular Rapid Communications, Vol. 35, no.2, p. 228-233 (Janvier)
Permanent URL http://hdl.handle.net/2078.1/138030