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Promoting the activity of LiFePO4 (olivine) cathode of Li-ion battery by supramolecular complexes with single walled carbon nanotubes
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SYSNO ASEP 0352264 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Promoting the activity of LiFePO4 (olivine) cathode of Li-ion battery by supramolecular complexes with single walled carbon nanotubes Author(s) Kavan, Ladislav (UFCH-W) RID, ORCID
Exnar, I. (CH)
Graetzel, M. (CH)Source Title NANOTECH CONFERENCE & EXPO 2009, VOL 3, TECHNICAL PROCEEDINGS - NANOTECHNOLOGY 2009: BIOFUELS, RENEWABLE ENERGY, COATINGS FLUIDICS AND COMPACT MODELING. - Boca Raton : CRC PRESS-TAYLOR & FRANCIS GROUP, 2009 - ISBN 978-1-4398-1784-1 Pages s. 58-61 Number of pages 4 s. Action NANOTECH CONFERENCE & EXPO 2009 Event date 03.05.2009-07.05.2009 VEvent location Houston Country US - United States Event type WRD Language eng - English Country US - United States Keywords olivine cathode ; carbon electrode ; Li-ion battery Subject RIV CG - Electrochemistry R&D Projects LC510 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) IAA400400804 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KAN200100801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40400503 - UFCH-W (2005-2011) Annotation The amphiphilic Ru-bipyridine complex, Z-907Na acts as a surfactant for solubilization of single walled carbon nanotubes (SWNTs) in acetonitrile+t-butanol. The supramolecular assembly Z-907Na/SWNT was characterized by optical and Raman spectro/electrochemistry. Its redox potential of 3.5 V vs. Li/Li+ is matching almost exactly the formal potential of LiFePO4/FePO4 couple. The Z-907Na/SWNT assembly is adsorbed on the surface of LiFePO4 (olivine) via the free carboxylic groups at the bipyridine ligand. This provides a composite material with roughly monolayer coverage by Z-907Na. Electrodes fabricated from Z-907Na/SWNT/LiFePO4 composite exhibited greatly enhanced activity for electrochemical Li+ extraction/insertion compared to the performance of electrodes made from pure LiFePO4. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2011
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