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Hybrid Architectures from 3D Aligned Arrays of Multiwall Carbon Nanotubes and Nanoparticulate LiCoPO4: Synthesis, Properties and Evaluation of Their Electrochemical Performance as Cathode Materials in Lithium Ion Batteries

Schneider, Jörg J. ; Khanderi, Jayaprakash ; Popp, Alexander ; Engstler, Jörg ; Tempel, Hermann ; Sarapulova, Angelina ; Bramnik, Natalia N. ; Mikhailova, Daria ; Ehrenberg, Helmut ; Schmitt, Ljubomira A. ; Dimesso, Lucangelo ; Förster, Christoph ; Jaegermann, Wolfram (2011)
Hybrid Architectures from 3D Aligned Arrays of Multiwall Carbon Nanotubes and Nanoparticulate LiCoPO4: Synthesis, Properties and Evaluation of Their Electrochemical Performance as Cathode Materials in Lithium Ion Batteries.
In: European Journal of Inorganic Chemistry, 2011 (28)
doi: 10.1002/ejic.201100217
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Hybrid materials composed of LiMPO4 (M = Fe or Co) with multiwalled carbon nanotubes (MCNTs) were synthesized by tethering lithium phosphoolevins on isolated stochastically disordered MWCNTs as well as on ordered 3D MWCNT arrays via solution based impregnation routes. Ordered 3D arrays of MWCNT monoliths comprising MWCNTs with nominal tube diameters of 60 and 200 nm were synthesized by a catalyst free, template based method, with porous aluminum oxide (PAOX) acting as a template. Consecutive selectiveetching processes gave free standing aligned 3D carbon nanotube (CNT) architectures that were used as supporting cathode structures for electroactive LiCoPO4. LiCoPO4 nanoparticle suspensions derived from an ethanol based organic phosphate source turned out to be superior for the tethering of LiCoPO4 nanoparticles onto the 3D aligned CNT arrays compared to an aqueous based tethering route, thus giving hybrid materials with better electrochemical battery performance compared to materials generated by the latter method. Li ion extraction within the ordered 3D CNT/LiCoPO4 composites seems to be a two-step process and the Li intercalation a one-step process, highlighting the enhanced kinetics of the Li insertion process in the 3D CNT/LixCoPO4 composite in comparison to a particulate mixture of LixCoPO4 that is typically present in a conventional carbon/LiCoPO4 cathode composite system.

Typ des Eintrags: Artikel
Erschienen: 2011
Autor(en): Schneider, Jörg J. ; Khanderi, Jayaprakash ; Popp, Alexander ; Engstler, Jörg ; Tempel, Hermann ; Sarapulova, Angelina ; Bramnik, Natalia N. ; Mikhailova, Daria ; Ehrenberg, Helmut ; Schmitt, Ljubomira A. ; Dimesso, Lucangelo ; Förster, Christoph ; Jaegermann, Wolfram
Art des Eintrags: Bibliographie
Titel: Hybrid Architectures from 3D Aligned Arrays of Multiwall Carbon Nanotubes and Nanoparticulate LiCoPO4: Synthesis, Properties and Evaluation of Their Electrochemical Performance as Cathode Materials in Lithium Ion Batteries
Sprache: Englisch
Publikationsjahr: Oktober 2011
Titel der Zeitschrift, Zeitung oder Schriftenreihe: European Journal of Inorganic Chemistry
Jahrgang/Volume einer Zeitschrift: 2011
(Heft-)Nummer: 28
DOI: 10.1002/ejic.201100217
Kurzbeschreibung (Abstract):

Hybrid materials composed of LiMPO4 (M = Fe or Co) with multiwalled carbon nanotubes (MCNTs) were synthesized by tethering lithium phosphoolevins on isolated stochastically disordered MWCNTs as well as on ordered 3D MWCNT arrays via solution based impregnation routes. Ordered 3D arrays of MWCNT monoliths comprising MWCNTs with nominal tube diameters of 60 and 200 nm were synthesized by a catalyst free, template based method, with porous aluminum oxide (PAOX) acting as a template. Consecutive selectiveetching processes gave free standing aligned 3D carbon nanotube (CNT) architectures that were used as supporting cathode structures for electroactive LiCoPO4. LiCoPO4 nanoparticle suspensions derived from an ethanol based organic phosphate source turned out to be superior for the tethering of LiCoPO4 nanoparticles onto the 3D aligned CNT arrays compared to an aqueous based tethering route, thus giving hybrid materials with better electrochemical battery performance compared to materials generated by the latter method. Li ion extraction within the ordered 3D CNT/LiCoPO4 composites seems to be a two-step process and the Li intercalation a one-step process, highlighting the enhanced kinetics of the Li insertion process in the 3D CNT/LixCoPO4 composite in comparison to a particulate mixture of LixCoPO4 that is typically present in a conventional carbon/LiCoPO4 cathode composite system.

Freie Schlagworte: Hybrid materials; Lithium-ion batteries; Electrochemistry; Nanotubes; Nanoparticles; Phosphoolevins
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung
Hinterlegungsdatum: 31 Aug 2012 13:28
Letzte Änderung: 26 Mär 2015 09:09
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