Nanomaterials in Secondary Battery Development

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This granted funded research into the application of nanoscience to Li-ion batteries. Different synthesis strategies were employed to create a nanofiber electrode (based on tin-oxide) and a honeycomb electrode (carbon). In both cases, we showed that the nanostructured material was capable of delivering dramatically increased specific capacity (mAh/g) upon discharge when compared to conventional film electrodes. This ability is due to the decreased solid-state diffusion distance of the Li-ion in the nanostructured electrodes. The nanofiber-SnO{sub 2} electrode was created by the template synthesis method. Briefly, a precursor solution impregnates the monodisperse nanoscopic pores of a sacrificial template membrane. The pores ... continued below

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Martin, C. R. September 15, 1999.

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Description

This granted funded research into the application of nanoscience to Li-ion batteries. Different synthesis strategies were employed to create a nanofiber electrode (based on tin-oxide) and a honeycomb electrode (carbon). In both cases, we showed that the nanostructured material was capable of delivering dramatically increased specific capacity (mAh/g) upon discharge when compared to conventional film electrodes. This ability is due to the decreased solid-state diffusion distance of the Li-ion in the nanostructured electrodes. The nanofiber-SnO{sub 2} electrode was created by the template synthesis method. Briefly, a precursor solution impregnates the monodisperse nanoscopic pores of a sacrificial template membrane. The pores run the membrane's entire length. The precursor solution is then processed to the desired material, here using sol-gel chemistry, and the template is removed. This leaves nanostructures of the desired product intact and extending from a substrate like the bristles of a brush. This research topic combines this nanofabrication technique with the Sn-based anode. Tin-oxide based composites have shown great promise as an alternative material for Li-ion battery anodes. This material is electrochemically converted to composite Sn/LiO{sub 2} electrodes. In this form, they are theoretically capable of storing twice the amount of Li as carbon, the current commercial anode. We showed important improvements in rate-capabilities and cycle-life of this Sn-based nanoscale electrode compared to a thin-film electrode of the same material. Rate-capabilities are a measurement of the specific capacity able to be delivered at increasing discharge rates (1C = 1/h). Figure 1 compares the rate capabilities of the nanostructured electrode to that of the film control electrode. This report shows the nanostructured material was capable of delivering dramatically increased specific capacity (mAh/g) upon discharge when compared to conventional film electrodes.

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OSTI as DE00824764

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  • Other Information: PBD: 15 Sep 1999

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  • Report No.: DOE/ER/14958-1
  • Grant Number: FG02-99ER14958
  • DOI: 10.2172/824764 | External Link
  • Office of Scientific & Technical Information Report Number: 824764
  • Archival Resource Key: ark:/67531/metadc779834

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  • September 15, 1999

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  • Dec. 3, 2015, 9:30 a.m.

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  • Aug. 5, 2016, 3:33 p.m.

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Martin, C. R. Nanomaterials in Secondary Battery Development, report, September 15, 1999; United States. (digital.library.unt.edu/ark:/67531/metadc779834/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.