Abstract
Nanocomposite solid electrolytes were prepared by impregnation of LiClO4 into pores of the metal-organic framework Cr3[C6H4(COO)2]3F (MIL-101(Cr)), and their conductivity was investigated. At temperatures 25–150 °C and relative humidity of 50%, the composites easily absorb water with formation liquid phase in the pores and have conductivity values typical for water solutions. Conductivity decreases with diminishing the humidity; however, complete dehydration may be achieved only after prolonged heating in vacuum at 180 °C. The concentration dependence of conductivity of dehydrated samples goes through the maximum at nearly 6 mol% of MIL-101(Cr) and reaches 3 × 10−3 S/cm at 160 °C; the activation energy decreases in the nanocomposites. Using the volt-amperometric technique on the sample with two nickel electrodes, the electrochemical decomposition voltage value was found to be nearly 3.5 V at 160 °C. It suggests that the ionic conductivity is caused by lithium cations rather than protons or electrons.
Original language | English |
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Pages (from-to) | 6167-6173 |
Number of pages | 7 |
Journal | Ionics |
Volume | 26 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 2020 |
Keywords
- Decomposition voltage
- Effect of humidity on conductivity
- High lithium ion conductivity
- Metal-organic frameworks
- MIL-101(Cr)
- Nanocomposite solid electrolytes
- OXIDE
- VAPOR ADSORPTION
- MIL-101(CR)
- CONDUCTORS
- COMPOSITE SOLID ELECTROLYTES
- KINETICS
- RECENT PROGRESS