TY - JOUR

T1 - Transport and structural properties of (CH3)4NBF4 with nanodiamonds filler

AU - Stebnitskii, Ivan

AU - Mateyshina, Yulia

AU - Uvarov, Nikolai

N1 - Stebnitskii, I. Transport and structural properties of (CH3)4NBF4 with nanodiamonds filler / I. Stebnitskii, Yu. Mateyshina, N. Uvarov // Chimica Techno Acta. – 2025. – Vol. 12, No. 2. – P. 12209. – DOI 10.15826/chimtech.2025.12.2.09.

PY - 2025

Y1 - 2025

N2 - Composite solid electrolytes are promising materials for electrochemical devices. The most interesting ionic components for them are salts of substituted ammonium due to their high thermal and electrochemical stability, but the properties of composites based on them are poorly understood. Composite solid electrolytes based on the substituted ammonium salt (CH3)4NBF4 with highly dispersed nanodiamonds CND with specific surface area Ssp = 300±20 m2/g in a wide range of filler concentrations have been synthesized for the first time. It was found by X-ray diffraction method that the introduction of СND leads to the amorphization of the salt. The highest conductivity values are characterized by the composite 0.03(СH3)4NBF4 – 0.97CND (σ = 4.2∙10–3 S/cm at 300 °C), whose electrical conductivity is 3-4 orders of magnitude higher than that of the original salt. Modeling the concentration dependence of the electrical conductivity of the composites using the mixing equation showed that the reason for the increase in electrical conductivity is the formation of an amorphous salt layer, the electrical conductivity of which is 4–5 orders of magnitude higher than that of the crystalline phase (CH3)4NBF4

AB - Composite solid electrolytes are promising materials for electrochemical devices. The most interesting ionic components for them are salts of substituted ammonium due to their high thermal and electrochemical stability, but the properties of composites based on them are poorly understood. Composite solid electrolytes based on the substituted ammonium salt (CH3)4NBF4 with highly dispersed nanodiamonds CND with specific surface area Ssp = 300±20 m2/g in a wide range of filler concentrations have been synthesized for the first time. It was found by X-ray diffraction method that the introduction of СND leads to the amorphization of the salt. The highest conductivity values are characterized by the composite 0.03(СH3)4NBF4 – 0.97CND (σ = 4.2∙10–3 S/cm at 300 °C), whose electrical conductivity is 3-4 orders of magnitude higher than that of the original salt. Modeling the concentration dependence of the electrical conductivity of the composites using the mixing equation showed that the reason for the increase in electrical conductivity is the formation of an amorphous salt layer, the electrical conductivity of which is 4–5 orders of magnitude higher than that of the crystalline phase (CH3)4NBF4

KW - Substituted ammonium salts

KW - nanodiamonds

KW - tetramethylammonium tetrafluoroborate

KW - transport properties

UR - https://www.mendeley.com/catalogue/9021631a-00f5-3043-b4c6-a7247401a437/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105001259007&origin=inward&txGid=425ec5024dec8bb1d3c84132a2dbc5b3

UR - https://elibrary.ru/item.asp?id=80585151

U2 - 10.15826/chimtech.2025.12.2.09

DO - 10.15826/chimtech.2025.12.2.09

M3 - Article

VL - 12

JO - Chimica Techno Acta

JF - Chimica Techno Acta

SN - 2409-5613

IS - 2

M1 - 12209

ER -