Suppressed spin-density-wave transition and enhanced electrical conductivity in chlorine doped Ca3Co4O9−xClx ceramics

Dai, Dongqin; Zhao, Bangchuan; Huang, Yanan; Sun, Yan; Xie, Anjian; Shen, Yuhua

doi:10.1016/j.jallcom.2012.12.139

Cited by 6 publications

(4 citation statements)

References 37 publications

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“…This is manifested as a broadband below 80 K in the ρ-T curve. Similar results have also been obtained in the studies reported by some researchers [30,31].…”

Section: Resultssupporting

confidence: 92%

“…It can be concluded that the T n value increases by the Yb-substitution level instead of the x¼ 0.01 Ybsubstitution level (see Fig. 4), indicating that the temperature region of electron-electron scattering becomes wider [30]. Increase in T n suggests the decrease of m n which indicates an increased bandwidth and a reduced electronic correlation.…”

Section: Resultsmentioning

confidence: 91%

“…where μ(T) is the mobility of carriers, and E 0 the energy gap caused by the SDW at Fermi surface [30,33,34]. The ρ(T) data in the IC-SDW region are fitted to Eq.…”

Section: Resultsmentioning

confidence: 99%

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Decrease of Ca3Co4O9+δ thermal conductivity by Yb-doping

KIirat

Aksan

Rasekh

et al. 2015

Ceramics International

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In this study, the effect of Yb-substitution on the structural, electrical and thermal transport properties of the Ca 3 Co 4 O 9 þ δ system has been investigated in the low temperature region (between 10 and 300 K). The resistivity of samples increases with raising the Yb-concentration in the system. All the samples show a metal-semiconductor transition below 85 K. In the analysis based on Strongly Correlated Fermi Liquid Model, an increased bandwidth and a reduced electronic correlation are found. It has also been found that the energy gap, E 0 , value also decreases with Ybsubstitution. The samples show positive thermoelectric power, indicating that dominant charge carriers are holes in all the samples. The thermoelectric power value decreases with Yb-substitution. From Mott equation, it is determined that the Fermi energy and hole concentration decrease in the Yb-susbtituted samples, compared to the undoped ones. Thermal conductivity, κ, is decreased in about 50% of the measured in undoped samples for the 0.01 and 0.03 Yb-doped samples at 300 K. Highest figure of merit, ZT, value is found to be 5.4 10 À 3 at 300 K for the unsubstituted sample and the ZT value decreases by the substitution.

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“…This is manifested as a broadband below 80 K in the ρ-T curve. Similar results have also been obtained in the studies reported by some researchers [30,31].…”

Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 91%

See 1 more Smart Citation

Decrease of Ca3Co4O9+δ thermal conductivity by Yb-doping

KIirat

Aksan

Rasekh

et al. 2015

Ceramics International

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“…This motivates extensive efforts in the development of synthesis methods for V 6 O 13 such as thermal decomposition [12][13][14], sol-gel [3,4,15,16], electrodeposition [17,18], and sol-hydrothermal method [19]. The process of thermal decomposition of ammonium metavanadate to gain V 6 O 13 was relatively simple, but the composition and the homogeneity of the product are difficult to control.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis and electrochemical performance of Mn-doped V6O13 as cathode material for lithium-ion battery

Long

Zou

et al. 2014

Ionics

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Mn x V 6−x O 13 (x=0.01, 0.02, 0.03, 0.04) were successfully synthesized via a simple hydrothermal method followed by heat-treatment. Both crystal domain size, electronic conductivity and the lithium diffusion coefficient of the Mn x V 6−x O 13 samples were influenced by the doping amount of Mn 2+ . When x=0.02, the product was nano-sized particles and exhibited the best electrochemical performance. The enhanced electrochemical performance originated from its higher total conductivity and higher lithium diffusion coefficient.

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Solvothermal synthesis and electrochemical performance of Ag-doped V6O13 as cathode material for lithium-ion battery

Wang

Zou

et al. 2014

Ionics

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Suppressed spin-density-wave transition and enhanced electrical conductivity in chlorine doped Ca3Co4O9−xClx ceramics

Cited by 6 publications

References 37 publications

Decrease of Ca3Co4O9+δ thermal conductivity by Yb-doping

Decrease of Ca3Co4O9+δ thermal conductivity by Yb-doping

Hydrothermal synthesis and electrochemical performance of Mn-doped V6O13 as cathode material for lithium-ion battery

Solvothermal synthesis and electrochemical performance of Ag-doped V6O13 as cathode material for lithium-ion battery

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