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|a (TOE)ost918635
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|a (TOE)918635
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|a E 1.99:lbnl--61748
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|a lbnl--61748
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|a Factors Influencing the Quality of Carbon Coatings onLiFePO4
|h [electronic resource]
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|a Washington, D.C. :
|b United States. Department of Energy. ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2006.
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| 336 |
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|a text
|b txt
|2 rdacontent.
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|a computer
|b c
|2 rdamedia.
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|a online resource
|b cr
|2 rdacarrier.
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|a Published through SciTech Connect.
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|a 10/11/2006.
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|a "lbnl--61748"
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|a Journal of the Electrochemical Society 154 5 ISSN 0013-4651; JESOAN FT.
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| 500 |
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|a Wilcox, James D.; Doeff, Marca M.; Marcinek, Marek; Kostecki,Robert.
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| 500 |
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|a Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
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| 520 |
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|a Several LiFePO4/C composites were prepared and characterizedelectrochemically in lithium half-cells. Pressed pellet conductivitiescorrelated well with the electrochemical performance in lithiumhalf-cells. It was found that carbon structural factors such as sp2/sp3,D/G, and H/C ratios, as determined by Raman spectroscopy and elementalanalysis, influenced the conductivity and rate behavior strongly. Thestructure of the residual carbon could be manipulated through the use ofadditives during LiFePO4 synthesis. Increasing the pyromellitic acid (PA)content in the precursor mix prior to calcination resulted in asignificant lowering of the D/G ratio and a concomitant rise in thesp2/sp3 ratio of the carbon. Addition of both iron nitrate and PAresulted in higher sp2/sp3 ratios without further lowering the D/Gratios, or increasing carbon contents. The best electrochemical resultswere obtained for LiFePO4 processed with both ferrocene and PA. Theimprovement is attributed to better decomposition of the carbon sources,as evidenced by lower H/C ratios, a slight increase of the carbon content(still below 2 wt. percent), and more homogeneous coverage. A discussionof the influence of carbon content vs. structural factors on thecomposite conductivities and, by inference, the electrochemicalperformance, is included.
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|b DE-AC02-05CH11231.
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| 650 |
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|a Lithium Phosphates.
|2 local.
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| 650 |
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|a Iron Phosphates.
|2 local.
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| 650 |
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|a Composite Materials.
|2 local.
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| 650 |
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|a Electric Conductivity.
|2 local.
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| 650 |
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|a Morphology.
|2 local.
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| 650 |
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|a Additives.
|2 local.
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| 650 |
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|a Carbon.
|2 local.
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| 650 |
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|a Electrochemistry.
|2 local.
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| 650 |
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|a Performance.
|2 local.
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| 650 |
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|a Coatings.
|2 local.
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| 650 |
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|a Materials Science.
|2 edbsc.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|4 spn.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
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| 856 |
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|u http://www.osti.gov/scitech/biblio/918635
|z Online Access (via OSTI)
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| 907 |
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|a .b7041662x
|b 03-09-23
|c 04-01-12
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| 998 |
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|a web
|b 05-20-19
|c f
|d m
|e p
|f eng
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|h 0
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|a Information bridge
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|i 056e106a-1100-5343-92b9-186522e27131
|s 2c81c408-d80a-5ae4-a662-b4cb482fd3c8
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| 952 |
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:lbnl--61748
|h Superintendent of Documents classification
|i web
|n 1
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