TY - JOUR

T1 - Electrolytes in the [N13pip]ClO4-LiClO4-Al2O3 system for solid state lithium batteries

AU - Kyzlasova, Daria

AU - Ulihin, Artem

AU - Uvarov, Nikolai

N1 - This work was supported by the Russian Science Foundation (grant no. 20-13-00302).

PY - 2024

Y1 - 2024

N2 - The transport, electrochemical, structural, and thermal properties of electrolytes in the ternary system [N13pip]ClO4-LiClO4-γ-Al2O3 (N13pip is N-methyl-N-ethyl-piperidinium cation) were investigated at the molar ratio [N13pip]ClO4:LiClO4 = 0.82:0.18. The addition of alumina leads to a change in the thermodynamic properties of the [N13pip]ClO4-LiClO4 system that can be explained by a partial transfer of lithium perchlorate from the organic phase to the surface of γ-Al2O3. The highest ionic conductivity of 6.2∙10–4 S/cm at 110 °C was observed for the composition containing the volume fraction (f) of γ-Al2O3 equal to 0.5. The increase in conductivity compared to the binary system 0.82[N13pip]ClO4-0.18LiClO4 is achieved due to the amorphization of the organic salt near the salt/LiClO4/oxide interfaces. Galvanostatic cycling with Li electrodes shows that composites with f = 0.5 are stable at 110 °C for at least 68 charge/discharge cycles, and the electrolyte is shown to be electrochemically stable up to 5 V. This system can be used as a solid-state electrolyte in lithium-ion current sources.

AB - The transport, electrochemical, structural, and thermal properties of electrolytes in the ternary system [N13pip]ClO4-LiClO4-γ-Al2O3 (N13pip is N-methyl-N-ethyl-piperidinium cation) were investigated at the molar ratio [N13pip]ClO4:LiClO4 = 0.82:0.18. The addition of alumina leads to a change in the thermodynamic properties of the [N13pip]ClO4-LiClO4 system that can be explained by a partial transfer of lithium perchlorate from the organic phase to the surface of γ-Al2O3. The highest ionic conductivity of 6.2∙10–4 S/cm at 110 °C was observed for the composition containing the volume fraction (f) of γ-Al2O3 equal to 0.5. The increase in conductivity compared to the binary system 0.82[N13pip]ClO4-0.18LiClO4 is achieved due to the amorphization of the organic salt near the salt/LiClO4/oxide interfaces. Galvanostatic cycling with Li electrodes shows that composites with f = 0.5 are stable at 110 °C for at least 68 charge/discharge cycles, and the electrolyte is shown to be electrochemically stable up to 5 V. This system can be used as a solid-state electrolyte in lithium-ion current sources.

KW - ionic conductivity

KW - lithium-ion current sources

KW - organic ionic plastic crystals

KW - solid composite electrolytes

KW - solid state ionics

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85201186719&origin=inward&txGid=4d24757934ca1a98453da9271a77e293

UR - https://www.mendeley.com/catalogue/91a968e3-454d-374f-a68a-a3584da98a91/

U2 - 10.15826/chimtech.2024.11.3.04

DO - 10.15826/chimtech.2024.11.3.04

M3 - Article

VL - 11

JO - Chimica Techno Acta

JF - Chimica Techno Acta

SN - 2409-5613

IS - 3

M1 - 202411304

ER -