Lithium-substituted cobalt oxide spinels LixM1−xCo2O4 (M = Co2+, Zn2+; 0 ≤ x ≤ 0.4) |
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Authors: | NK Appandairajan B Viswanathan J Gopalakrishnan |
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Institution: | Department of Chemistry, Indian Institute of Technology, Madras, 600 036, India |
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Abstract: | Substitution of Li+ into Co3O4 and ZnCo2O4 gives rise to the solid solution series LixM1?xCo2O4 (M = Co2+ or Zn2+) having the spinel structure upto x = 0.4. X-Ray diffraction intensities show that the spinel solid solutions are likely to have the following cation distributions: (Co2+)tLi+xCo3+2?3xCo4+2x]0O4 and (Zn2+1?xCo2+x)tLi+xCo3+2?3xCo4+2x]0O4. Electrical resistivity and Seebeck coefficient data indicate that the electron transport in these systems occurs by a small-polaron hopping mechanism. |
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