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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.


Cyclic voltammetry for pure CuO and CuO/MWCNT. Cyclic voltammetry of pure CuO and CuO/MWCNT composite nanostructures in the first ten cycles.
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Figure 5: Cyclic voltammetry for pure CuO and CuO/MWCNT. Cyclic voltammetry of pure CuO and CuO/MWCNT composite nanostructures in the first ten cycles.

Mentions: Cyclic voltammetry was recorded for pure CuO and CuO/MWCNT, as shown in Figure 5. For both samples, the CV profiles were nearly identical to those reported for the CuO nanostructures [10,12]. Efficient electron transport by introducing MWCNT upon lithiation of the CuO was confirmed by the enhanced redox peaks in the CV curves (measured on samples of similar mass at the same voltage sweep rate). Therefore, it is believed that MWCNT improved the Li electroactivity of the CuO nanostructures because of its effect on conductivity and the efficient electron path [16,26].


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)

Cyclic voltammetry for pure CuO and CuO/MWCNT. Cyclic voltammetry of pure CuO and CuO/MWCNT composite nanostructures in the first ten cycles.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 5: Cyclic voltammetry for pure CuO and CuO/MWCNT. Cyclic voltammetry of pure CuO and CuO/MWCNT composite nanostructures in the first ten cycles.
Mentions: Cyclic voltammetry was recorded for pure CuO and CuO/MWCNT, as shown in Figure 5. For both samples, the CV profiles were nearly identical to those reported for the CuO nanostructures [10,12]. Efficient electron transport by introducing MWCNT upon lithiation of the CuO was confirmed by the enhanced redox peaks in the CV curves (measured on samples of similar mass at the same voltage sweep rate). Therefore, it is believed that MWCNT improved the Li electroactivity of the CuO nanostructures because of its effect on conductivity and the efficient electron path [16,26].

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.