Influence of the nature of a heterogeneous dopant on the transport and thermodynamic properties of composites based on n-methyl-n-butyl-piperidinium tetrafluoroborate

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Composite solid electrolytes based on n-methyl-n-butyl-piperidinium tetrafluoroborate [(CH3)(C4H9)C5H10N]BF4–A (where A is γ-Al2O3, SiO2) were synthesized and their thermal and electrically conductive properties have been studied. It was found that the conductivity of the [C10H22N]BF4–Al2O3 composites passes through a maximum at x~0.9 and reaches a value of 4.6·10-4 S/cm at 130оC for the 0.1[C10H22N]BF4–0.9Al2O3 composite. The absence of a thermal effect at the melting temperature of the ionic salt, which indicates a high ionic conductivity, indicates that at x ≥ 0.9, n-methyl-n-butyl-piperidinium tetrafluoroborate is in the amorphous state and ion transfer occurs along the ionic salt/oxide phase boundary. In the case of [C10H22N]BF4 – SiO2 composites, the effect of a heterogeneous dopant on ion transport is less significant and the conductivity is due to the ionic salt of the additive present in the pores.

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作者简介

A. Ulikhin

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences

编辑信件的主要联系方式.
Email: ulikhin@solid.nsc.ru
俄罗斯联邦, Novosibirsk

A. Izmodenova

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University

Email: ulikhin@solid.nsc.ru
俄罗斯联邦, Novosibirsk; Novosibirsk

N. Uvarov

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences

Email: ulikhin@solid.nsc.ru
俄罗斯联邦, Novosibirsk

参考

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2. Fig. 1 . Results of differential scanning calorimetry of pure ionic salt and composites with different concentrations of aluminum oxide for the first heating (a) and for the second heating (b).

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3. Fig. 2. Results of differential scanning calorimetry of pure ionic salt and composites with different concentrations of silicon oxide for the first heating (a) and for the second heating (b).

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4. Fig. 3. Temperature dependence of the conductivity of composites (1-x)[(CH3)(C4H9)C5H10N]BF4–xAl2O3 (a) and (1-x) [(CH3)(C4H9)C5H10N]BF4–xSiO2 (b).

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5. Fig. Fig. 4. Concentration dependences of the conductivity of [(CH3)(C4H9)C5H10N]BF4–A composites (where A –γ-Al2O3, SiO2) at T = 373 K.

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