GRAPHITE MATERIAL AND ELECTRODE MATERIAL USING SAME
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United States of America Patent
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Sep 29, 2016
app pub date -
Oct 24, 2014
filing date -
Oct 24, 2013
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Abstract
An object of the present invention is to provide an electrode material and a graphite material used for an electrode material, from which an electrochemical element with a small initial irreversible capacity and excellent cycle characteristics can be obtained. A graphite material of the present invention is a graphite material having a specific surface area of 0.1 to 30 m2/g, an intensity ratio R (ID/IG) of a peak intensity (ID) at around 1,360 cm−1 to a peak intensity (IG) at around 1,580 cm−1 of not less than 0.60 and not more than 1.30, and an intensity ratio S (I1520/IG) of a peak intensity (I1520) at 1,520 cm−1 to a peak intensity (IG) at around 1,580 cm−1 of not less than 0.55 and not more than 0.70, in a spectrum obtained by the laser Raman spectroscopy using an excitation wavelength of 532 nm.
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