ELECTRODE ACTIVE MATERIAL, ELECTRODE, AND SECONDARY CELL
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United States of America Patent
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Aug 23, 2013
filing date -
Feb 28, 2011
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Abstract
An electrode active material has the general formula (I) or (II) in a constituent unit. In the formulas, X is C or Si; and Y1 and Y2, or Y3 and Y4 are different substituent groups selected from among S, O, Se, Te, NH, SR1′R2′, and SR3′R4′. R1 to R4 and R1′ to R4′ are predetermined substituent groups. Z is CH2, CF2, O, S, SO, SO2, Se, or N—Z′ (where Z′ is a hydrogen atom, an alkyl group, an aryl group, or an oxygen radical). Thereby, high energy density, high output, and excellent cycle characteristics which has a small deterioration of capacity even in repeating charge and discharge are realized.
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