Micellar Cathodes from Self-Assembled Nitroxide-Containing Block Copolymers in Battery Electrolytes
(2014) Macromolecular Rapid Communications — Vol. 35, n° 2, p. 228-233 (Janvier) (2014)
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- Abstract
- 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.
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Citations
Hauffman, G., Maguin, Q., Bourgeois, J.-P., Vlad, A., & Gohy, J.-F. (2014). Micellar Cathodes from Self-Assembled Nitroxide-Containing Block Copolymers in Battery Electrolytes. Macromolecular Rapid Communications, 35(2), 228-233 (Janvier). https://doi.org/10.1002/marc.201300532 (Original work published 2014)