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Low-temperature synthesis of CuO-interlaced nanodiscs for lithium ion battery electrodes.

Seo SD, Jin YH, Lee SH, Shim HW, Kim DW - Nanoscale Res Lett (2011)

Bottom Line: After further prolonged reaction times, secondary irregular nanodiscs gradually grew vertically into regular nanodiscs.The electrochemical performances of the CuO nanodisc electrodes were evaluated in detail using cyclic voltammetry and galvanostatic cycling.Furthermore, we demonstrate that the incorporation of multiwalled carbon nanotubes enables the enhanced reversible capacities and capacity retention of CuO nanodisc electrodes on cycling by offering more efficient electron transport paths.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Materials Science and Engineering, Ajou University, Suwon 443-749, Korea. dwkim@ajou.ac.kr.

ABSTRACT
In this study, we report the high-yield synthesis of 2-dimensional cupric oxide (CuO) nanodiscs through dehydrogenation of 1-dimensional Cu(OH)2 nanowires at 60°C. Most of the nanodiscs had a diameter of approximately 500 nm and a thickness of approximately 50 nm. After further prolonged reaction times, secondary irregular nanodiscs gradually grew vertically into regular nanodiscs. These CuO nanostructures were characterized using X-ray diffraction, transmission electron microscopy, and Brunauer-Emmett-Teller measurements. The possible growth mechanism of the interlaced disc CuO nanostructures is systematically discussed. The electrochemical performances of the CuO nanodisc electrodes were evaluated in detail using cyclic voltammetry and galvanostatic cycling. Furthermore, we demonstrate that the incorporation of multiwalled carbon nanotubes enables the enhanced reversible capacities and capacity retention of CuO nanodisc electrodes on cycling by offering more efficient electron transport paths.

No MeSH data available.


Crystal structures of CuO products. (a-b) XRD pattern and FESEM image of the CuO powders, respectively. (c-d) Low magnification TEM and HRTEM images of an individual interlaced nanodisc, respectively. Inset in (c) shows a schematic illustration emphasizing the interlaced disc structure.
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Figure 1: Crystal structures of CuO products. (a-b) XRD pattern and FESEM image of the CuO powders, respectively. (c-d) Low magnification TEM and HRTEM images of an individual interlaced nanodisc, respectively. Inset in (c) shows a schematic illustration emphasizing the interlaced disc structure.

Mentions: The crystal structures of the obtained CuO products were analyzed through the XRD patterns in Figure 1a. All the reflection peaks could be completely indexed as well-crystalline, monoclinic CuO, which was in good agreement with literature values (JCPDS file no. 48-1548). As shown in Figure 1a, no characteristic peaks from unreacted starting materials or initially synthesized Cu(OH)2 precursors were detected on the XRD patterns of the products, indicating that all samples obtained were single-phase CuO.


Low-temperature synthesis of CuO-interlaced nanodiscs for lithium ion battery electrodes.

Seo SD, Jin YH, Lee SH, Shim HW, Kim DW - Nanoscale Res Lett (2011)

Crystal structures of CuO products. (a-b) XRD pattern and FESEM image of the CuO powders, respectively. (c-d) Low magnification TEM and HRTEM images of an individual interlaced nanodisc, respectively. Inset in (c) shows a schematic illustration emphasizing the interlaced disc structure.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211491&req=5

Figure 1: Crystal structures of CuO products. (a-b) XRD pattern and FESEM image of the CuO powders, respectively. (c-d) Low magnification TEM and HRTEM images of an individual interlaced nanodisc, respectively. Inset in (c) shows a schematic illustration emphasizing the interlaced disc structure.
Mentions: The crystal structures of the obtained CuO products were analyzed through the XRD patterns in Figure 1a. All the reflection peaks could be completely indexed as well-crystalline, monoclinic CuO, which was in good agreement with literature values (JCPDS file no. 48-1548). As shown in Figure 1a, no characteristic peaks from unreacted starting materials or initially synthesized Cu(OH)2 precursors were detected on the XRD patterns of the products, indicating that all samples obtained were single-phase CuO.

Bottom Line: After further prolonged reaction times, secondary irregular nanodiscs gradually grew vertically into regular nanodiscs.The electrochemical performances of the CuO nanodisc electrodes were evaluated in detail using cyclic voltammetry and galvanostatic cycling.Furthermore, we demonstrate that the incorporation of multiwalled carbon nanotubes enables the enhanced reversible capacities and capacity retention of CuO nanodisc electrodes on cycling by offering more efficient electron transport paths.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Materials Science and Engineering, Ajou University, Suwon 443-749, Korea. dwkim@ajou.ac.kr.

ABSTRACT
In this study, we report the high-yield synthesis of 2-dimensional cupric oxide (CuO) nanodiscs through dehydrogenation of 1-dimensional Cu(OH)2 nanowires at 60°C. Most of the nanodiscs had a diameter of approximately 500 nm and a thickness of approximately 50 nm. After further prolonged reaction times, secondary irregular nanodiscs gradually grew vertically into regular nanodiscs. These CuO nanostructures were characterized using X-ray diffraction, transmission electron microscopy, and Brunauer-Emmett-Teller measurements. The possible growth mechanism of the interlaced disc CuO nanostructures is systematically discussed. The electrochemical performances of the CuO nanodisc electrodes were evaluated in detail using cyclic voltammetry and galvanostatic cycling. Furthermore, we demonstrate that the incorporation of multiwalled carbon nanotubes enables the enhanced reversible capacities and capacity retention of CuO nanodisc electrodes on cycling by offering more efficient electron transport paths.

No MeSH data available.