Ionogels based on protic ionic liquid -lithium salt mixtures

•The effect of the addition of LiNO3 on the liquid range and electrical conductivity of EAN + LiNO3 mixtures is reported.•The effect of the confinement in silica-based matrices on the liquid range and electrical conductivity of EAN + LiNO3 mixtures is also stated.•Confinement in silica matrix and salt addition frustrates crystallization inducing an amorphous behaviour in all the samples.•The maximum values of ionic conductivity of EAN + LiNO3 ionogels correspond to the lowest salt concentration mixture (0.1 m)•NMR shows that the addition of lithium nitrate increases the mobility of the cation within the ionogel.