TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The metal iodide is lithium iodide, sodium iodide, potassium iodide or magnesium iodide. The metal selenium cyanide is lithium selenium cyanide, sodium selenium cyanide, potassium selenium cyanide or magnesium selenium cyanide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The liquid crystal electrolyte solution further contains heterocyclic compound (3), heterocyclic compound (4) which is capable to react with positive ion of electrolyte solution, heterocyclic compound (5) which is capable to react with iodine of electrolyte solution and/or compound (7) for improving performance of battery. The total molar concentration of compounds (3, 4, 5 and 7) is 0.1-0.5 mol.L-1. The iodide of compound (2) is alkyl imidazolium iodide ionic liquid, ionic liquid using iodine as negative ion, or metal iodide. The selenium cyanide of compound (2) is alkyl imidazolium selenium cyanide ionic liquid or metal selenium cyanide. Preferred Components: The compound (1) is chosen from cholesterol lipid derivative in liquid crystal state, cholesterol halogenated compound in liquid crystal state or its derivative, cholesterol alkyl carbonate in liquid crystal state or its derivative, alkyl carbonate in liquid crystal state or its derivative, phenyl ester in liquid crystal state or its derivative, Schiff alkali in liquid crystal state or its derivative, phenylaniline derivative in liquid crystal state, azoxybenzene derivative in liquid crystal state, cyanobiphenyl derivative in liquid crystal state, thiophene derivative in liquid crystal state, high molecular derivate in liquid crystal state, imidazole ionic liquid in liquid crystal state or its derivative, pyridine ionic liquid in liquid crystal state or its derivative, ammonium ionic liquid in liquid crystal state or its derivative, phosphine ionic liquid in liquid crystal state or its derivative, pyridine or sulfur and oxygen substituted pyridine ionic liquid in liquid crystal state or its derivative, bipyridyl ionic liquid in liquid crystal state or its derivative, disulfide substituted pyrazole ionic liquid in liquid crystal state or its derivative, alkaline metal carboxylate in liquid crystal state or its derivative, alkaline metal phosphonate in liquid crystal state or its derivative and/or alkaline metal ion compound in liquid crystal state. The alkyl imidazolium iodide is 3-hexyl-1-methyl imidazolium iodide, 3-propyl-1-methyl imidazolium iodide or 1,3-dimethyl-propyl imidazolium iodide. The alkyl imidazolium selenium cyanide is 3-hexyl-1-methyl imidazolium selenium cyanide or 3-propyl-1-methyl imidazolium selenium cyanide. The organic solvent is acetonitrile, butyl cyanide, trimethylene cyanide, 3-methoxypropionitrile, ethylene carbonate, propylene carbonate or alpha -butyrolactone. The room temperature ionic liquid is 1-propyl-3-methyl imidazole iodide, 3-ethyl-1-methyl imidazole sulfonamide trifluoroacetate, 3-ethyl-1-methyl trifluoroacetate, imidazole, pyrrole, phosphine or ammonium ionic liquid. The compound (3) is univalent or multivalent heterocyclic compounds like polyhydric alcohol, multivariate mercaptan, polyamine, polybasic carboxylic acid, ethylenediaminetetraacetic acid (EDTA) or its derivatives, pyridine and optionally substituted pyridine or its derivatives, bipyridine or its derivatives, terpyridyl or its derivatives, phenanthroline or its derivatives and/or benzimidazole or its derivatives. The compound (4) is univalent or multivalent heterocyclic compounds like polyhydric alcohol, multivalent mercaptan, polyamine, polybasic carboxylic acid, EDTA or its derivatives, terpyridyl or its derivatives and/or crown ether or its derivatives. The compound (5) is univalent or multivalent heterocyclic compounds like polyhydric alcohol, multivalent mercaptan, polyamine, polybasic carboxylic acid, EDTA or its derivatives, pyridine and optionally substituted pyridine or its derivatives and/or bipyridine or its derivatives. The compound (7) is salicylate, benzophenone, aziminobenzene, benzoglyoxaline, benzothiazole, nickel chelate and/or hindered amine.