Modification of aluminum current collectors with a conductive polymer for application in lithium batteries
| Autor: | Mathieu Saulnier, Steen B. Schougaard, David Lepage, Laurence Savignac, S. Gervais |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Fabrication Materials science Contact resistance chemistry.chemical_element 02 engineering and technology Current collector 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences law.invention lcsh:Chemistry chemistry lcsh:Industrial electrochemistry lcsh:QD1-999 law Electrode Electrochemistry Lithium Composite material 0210 nano-technology FOIL method lcsh:TP250-261 |
| Zdroj: | Electrochemistry Communications, Vol 102, Iss, Pp 1-4 (2019) |
| ISSN: | 1388-2481 |
| Popis: | Although often overlooked, current collectors play a significant role in the performance, safety, and stability of lithium batteries. Here we present a strategy to modify conventional Al current collectors using a conducting polymer, significantly decreasing contact resistance and improving battery performance. The oxidant Fe (III) p-toluenesulfonate is aerosolized onto an aluminum foil current collector, followed by polymerization of 3, 4-ethylenedioxythiophene (EDOT) by chemical vapor deposition (CVD). As such, this fabrication technique should scalable using roll-to-roll or similar fabrication methods. The coated foil was used as a cathode current collector in lithium batteries. The improvement of the current collector is determined by electrochemical test in coin cells with C-LiFePO4 (C-LFP) and lithium as active materials. At 15C discharge rate, the new composite C-LFP-PEDOT-Al electrode provides a ~30% increase in discharge capacity compared to the standard C-LFP-Al electrode. The new composite has a perfect stability over 50 cycles at a C/2.5 rate. Keywords: Poly (3, 4-ethylenedioxythiophene), C-LiFePO4, Current collector coating, Chemical vapor deposition, Lithium ion batteries |
| Databáze: | OpenAIRE |
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