The effect of lithium perchlorate (LiClO4) on the transport and thermal properties of the ternary system consisting of N-methyl-N-propylpiperidinium perchlorate, highly dispersed γ-aluminum oxide (having the specific surface area of 200 m2 /g), and lithium perchlorate was investigated. It was shown that the obtained composites exhibited thermal stability up to at least 190°C.