TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The ionic substituent is anionic or cationic substituent. The anionic substituent has counter cation. The cationic substituent has counter anion. The counter anion is iodine anion and sulfamide, disulfone imide, N-acyl sulfonamide, carboxylic acid, sulfonic acid, alcohol, methylene and anion dissociating active methine. The liquid crystal property polysiloxane is a polymeric liquid crystal compound obtained by polymerizing. EXAMPLE - A positive electrode sheet having a thickness of 95 mum, width of 54 mm and length 49 mm, was obtained by kneading a slurry comprising (in mass parts) positive electrode active material (43), graphite (2), acetylene black (2), polyacrylonitrile (3) and acrylonitrile (100), coating the resultant solution on an aluminum foil having thickness of 20 mum, compression molding after drying and welding lead board to the edge portion. A slurry containing negative electrode active material (43), acetylene black (2), graphite (2), polyacrylonitrile (3), and N-methyl pyrrolidone (100) was coated on a copper foil having a thickness of 10 mum. Then, the coated foil was compression molded after drying and heat processing to produce a negative electrode sheet having a thickness of 46 mum, width of 55 mm and length of 50 mm. The obtained negative electrode sheet and positive electrode sheet were dried at 230degreesC for 30 minutes. A polyethylene porous film separator and non-woven fabric were laminated on the positive electrode sheet. The liquid containing electrolyte composition was applied under pressure. The acetonitrile in the applied liquid was distilled at 50degreesC. The electrolyte liquid (E-213) containing LiBF4 (30) and polysiloxane having repeating unit of formula (2), was infiltrated into the non-woven fabric using a solvent. The dehydration dried negative electrode sheet was laminated on the non-woven fabric. The polyethylene terephthalate film was finally laminated to cover the battery. The four edges of the film were heat fused in vacuum and sealed to produce a sheet-type lithium secondary battery. The obtained battery had a target capacity of 0.97 and cycle capacity of 0.94.    n = 7.2