TY - JOUR

T1 - Effect of the Nature of a Heterogeneous Dopant on the Transport and Thermodynamic Properties of Composites Based on n-Methyl-n-Butylpiperidinium Tetrafluoroborate

AU - Ulikhin, A. S.

AU - Izmodenova, A. V.

AU - Uvarov, N. F.

N1 - This study was financially supported by the Russian Science Foundation (project no. 23-23-00556).

PY - 2024/6/27

Y1 - 2024/6/27

N2 - Abstract: Composite solid electrolytes based on n-methyl-n-butylpiperidinium tetrafluoroborate [(CH3)(C4H9)C5H10N]BF4–A (where A is γ-Al2O3, SiO2) were synthesized, and their thermal and electrically conductive properties were studied. The conductivity of the (1 – x)[C10H22N]BF4–xAl2O3 composites passes through a maximum at x ~ 0.9, reaching 4.6 × 10–4 S/cm at 130°C for 0.1[C10H22N]BF4–0.9Al2O3. The absence of a thermal effect at the melting temperature of the ionic salt, showing high ionic conductivity, indicates that at x ≥ 0.9 n-methyl-n-butylpiperidinium tetrafluoroborate is in the amorphous state, and ion transport occurs along the ionic salt/oxide interface. In the case of the [C10H22N]BF4–SiO2 composites, the effect of a heterogeneous dopant on the ion transport is less significant, and the conductivity is due to the ionic salt of the additive present in the pores.

AB - Abstract: Composite solid electrolytes based on n-methyl-n-butylpiperidinium tetrafluoroborate [(CH3)(C4H9)C5H10N]BF4–A (where A is γ-Al2O3, SiO2) were synthesized, and their thermal and electrically conductive properties were studied. The conductivity of the (1 – x)[C10H22N]BF4–xAl2O3 composites passes through a maximum at x ~ 0.9, reaching 4.6 × 10–4 S/cm at 130°C for 0.1[C10H22N]BF4–0.9Al2O3. The absence of a thermal effect at the melting temperature of the ionic salt, showing high ionic conductivity, indicates that at x ≥ 0.9 n-methyl-n-butylpiperidinium tetrafluoroborate is in the amorphous state, and ion transport occurs along the ionic salt/oxide interface. In the case of the [C10H22N]BF4–SiO2 composites, the effect of a heterogeneous dopant on the ion transport is less significant, and the conductivity is due to the ionic salt of the additive present in the pores.

KW - composite solid electrolytes

KW - ionic conductivity

KW - n-methyl-n-butylpiperidinium tetrafluoroborate

KW - plastic phases of organic salts

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001210648000008

UR - https://www.mendeley.com/catalogue/5e778cb3-2e62-3be3-8a32-e8960f248f77/

U2 - 10.1134/S1023193524010130

DO - 10.1134/S1023193524010130

M3 - Article

VL - 60

SP - 67

EP - 72

JO - Russian Journal of Electrochemistry

JF - Russian Journal of Electrochemistry

SN - 1023-1935

IS - 1

ER -