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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. and Khanderi, Jayaprakash and Popp, Alexander and Engstler, Jörg and Tempel, Hermann and Sarapulova, Angelina and Bramnik, Natalia N. and Mikhailova, Daria and Ehrenberg, Helmut and Schmitt, Ljubomira A. and Dimesso, Lucangelo and Förster, Christoph and 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, pp. 4349-4359, 2011, (28), ISSN 14341948, [Online-Edition: http://dx.doi.org/10.1002/ejic.201100217],
[Article]

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.

Item Type: Article
Erschienen: 2011
Creators: Schneider, Jörg J. and Khanderi, Jayaprakash and Popp, Alexander and Engstler, Jörg and Tempel, Hermann and Sarapulova, Angelina and Bramnik, Natalia N. and Mikhailova, Daria and Ehrenberg, Helmut and Schmitt, Ljubomira A. and Dimesso, Lucangelo and Förster, Christoph and Jaegermann, Wolfram
Title: 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
Language: English
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.

Journal or Publication Title: European Journal of Inorganic Chemistry
Volume: 2011
Number: 28
Uncontrolled Keywords: Hybrid materials; Lithium-ion batteries; Electrochemistry; Nanotubes; Nanoparticles; Phosphoolevins
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Surface Science
11 Department of Materials and Earth Sciences > Material Science > Structure Research
Date Deposited: 31 Aug 2012 13:28
Official URL: http://dx.doi.org/10.1002/ejic.201100217
Identification Number: doi:10.1002/ejic.201100217
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