Mechanochemical Synthesis of PEDOT:PSS Hydrogels for Aqueous Formulation of Li-Ion Battery Electrodes
| Autor: | Georgiana Sandu, Lidiya Komsiyska, Philippe Dubois, Bruno Ernould, Sorin Melinte, Pratik Ranjan Das, Roberto Lazzaroni, Julien Rolland, Yaroslav Filinchuk, Jean-François Gohy, Luhua Cheng, Nathalie Cheminet, Alexandru Vlad, Jérémy Brassinne |
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| Rok vydání: | 2017 |
| Předmět: |
Battery (electricity)
Aqueous solution Materials science 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Lithium-ion battery 0104 chemical sciences Corrosion Chemical engineering PEDOT:PSS Self-healing hydrogels Electrode General Materials Science Composite material 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | ACS Applied Materials & Interfaces. 9:34865-34874 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | Water-soluble binders can enable greener and cost-effective Li-ion battery manufacturing by eliminating the standard fluorine-based formulations and associated organic solvents. The issue with water-based dispersions, however, remains the difficulty in stabilizing them, requiring additional processing complexity. Herein, we show that mechanochemical conversion of a regular poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) water-based dispersion produces a hydrogel that meets all the requirements as binder for lithium-ion battery electrode manufacture. We particularly highlight the suitable slurry rheology, improved adhesion, intrinsic electrical conductivity, large potential stability window and limited corrosion of metal current collectors and active electrode materials, compared to standard binder or regular PEDOT:PSS solution-based processing. When incorporating the active materials, conductive carbon and additives with PEDOT:PSS, the mechanochemical processing induces simultaneous binder gelation and fine mixing of the components. The formed slurries are stable, show no phase segregation when stored for months, and produce highly uniform thin (25 μm) to very thick (500 μm) films in a single coating step, with no material segregation even upon slow drying. In conjunction with PEDOT:PSS hydrogels, technologically relevant materials including silicon, tin, and graphite negative electrodes as well as LiCoO |
| Databáze: | OpenAIRE |
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