Health & Environmental Research Online (HERO)


Print Feedback Export to File
7747357 
Journal Article 
Enhanced lithium ionic conductivity of lithium perchlorate in the metal-organic framework matrix 
Ulihin, A; Ponomareva, V; Uvarov, N; Kovalenko, K; Fedin, V 
2020 
Yes 
Ionics
ISSN: 0947-7047
EISSN: 0388-659X 
Springer Science and Business Media Deutschland GmbH 
HEIDELBERG 
26 
12 
6167-6173 
English 
WOS:000569293700001 
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. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature. 
Nanocomposite solid electrolytes; Metal-organic frameworks; MIL-101(Cr); Effect of humidity on conductivity; Decomposition voltage; High lithium ion conductivity