A high energy ionic liquid 2,2-dialkyltriazanium nitrate was obtained via quaterisation and metathetical reaction using unsymmetric dimethyl hydrazine as raw material. Its structure and composition were characterized by using mass spectrum and elemental analysis. Its thermal stability was investigated by using differential scanning calorimetry-thermogravimetric analysis(DSC-TGA). Its theoretical specific impulse was calculated by using Gibbs minimum free energy, and analysis method of product purity was est...