TY - JOUR

T1 - Composite solid electrolytes (n-C4H9)4NBF4–nanodiamonds

AU - Mateyshina, Yulia

AU - Stebnitskii, Ivan

AU - Uvarov, Nikolai

N1 - This research was funded by the Russian Science Foundation , project 20–13-00302.

PY - 2024/1

Y1 - 2024/1

N2 - Nanocomposites (n-C4H9)4NBF4–nanodiamonds were prepared and investigated for the first time. Nanodiamonds (CND) with a specific surface area of 300 ± 20 m2/g and grain size of 5.4 ± 0.3 nm was taken as heterogeneous additive. According to the results of X-ray diffraction and thermal analysis studies, at high fraction of CND the salt transforms to the amorphous phase which is stabilized on the interfaces with the nanodiamonds particles. The thickness of the amorphous layer was estimated from the thermal analysis data as 3.5 nm. It was found that the dependence of conductivity on the CND fraction has a maximum 1.2 × 10−3 S/cm at 150 °C for the composition 0.02(n-C4H9)4NBF4–0.98CND corresponding to the volume fraction of CND of 0.34. The conductivity was estimated using a mixing equation taking into account the concentration of the amorphous interface phase calculated from thermal analysis data. Estimation shows that conductivity of the amorphous interface phase is >3 orders of magnitude higher than that of pure (n-C4H9)4NBF4.

AB - Nanocomposites (n-C4H9)4NBF4–nanodiamonds were prepared and investigated for the first time. Nanodiamonds (CND) with a specific surface area of 300 ± 20 m2/g and grain size of 5.4 ± 0.3 nm was taken as heterogeneous additive. According to the results of X-ray diffraction and thermal analysis studies, at high fraction of CND the salt transforms to the amorphous phase which is stabilized on the interfaces with the nanodiamonds particles. The thickness of the amorphous layer was estimated from the thermal analysis data as 3.5 nm. It was found that the dependence of conductivity on the CND fraction has a maximum 1.2 × 10−3 S/cm at 150 °C for the composition 0.02(n-C4H9)4NBF4–0.98CND corresponding to the volume fraction of CND of 0.34. The conductivity was estimated using a mixing equation taking into account the concentration of the amorphous interface phase calculated from thermal analysis data. Estimation shows that conductivity of the amorphous interface phase is >3 orders of magnitude higher than that of pure (n-C4H9)4NBF4.

KW - Amorphous interface-stabilized phase

KW - Amorphous layer thickness

KW - Hybrid nanocomposites

KW - Ionic conductivity

KW - Nanodiamonds

KW - Tetrabutylammonium tetrafluoroborate

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85178352718&origin=inward&txGid=6ba54df3521d6e5ed1683b9eb56d52cf

UR - https://www.mendeley.com/catalogue/221394bf-7612-3de6-9358-ca160300eada/

U2 - 10.1016/j.ssi.2023.116419

DO - 10.1016/j.ssi.2023.116419

M3 - Article

VL - 404

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

M1 - 116419

ER -