TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The amide compound is chosen from N-methoxy methylcarbamate, N-methoxy ethylcarbamate, N-methoxy-N-methyl methylcarbamate, N-methoxy-N-methyl ethyl carbamate, N-methoxy-N-methyl propylcarbamate, N-methoxy-N-methyl butylcarbamate, N-methoxy-N-methyl trifluoroethylcarbamate, N-methoxy-N-methyl-2-fluoroethyl carbamate, N-methoxy-N-methyl pentafluoropropyl carbamate, N-methoxy-N-methyl-2-(perfluorohexyl) ethylcarbamate, N-methoxy-N-methyl-6-(perfluorobutyl)hexylcarbamate, N-methoxyethyl methylcarbamate, N-methoxyethyl-N-methyl methylcarbamate, N-methoxymethyl-N-methyl methylcarbamate, N-methyl-N-methoxyethyl carbamate, N-methyl-N-methoxyethyl methoxymethyl carbamate, N-methoxyethyl trifluoroethyl carbamate, N-methoxyethyl-N-methyl trifluoroethylcarbamate, N-methoxymethyl-N-methyl trifluoroethylcarbamate, N-methoxymethyl trifluoroethylcarbamate, N-methoxymethyl-N-ethyl trifluoroethylcarbamate, N-methoxyethyl-N-ethyl trifluoroethylcarbamate, N-methoxyethyl fluoroethylcarbamate, N-methoxyethyl-N-methyl, N-methoxymethyl-N-methyl fluoroethyl carbamate, N-methoxymethyl fluoroethylcarbamate, N-methoxymethyl-N-ethyl fluoroethyl carbamate, N-methoxyethyl-N-ethyl fluoroethylcarbamate, N-methoxyethyl pentafluoropropylcarbamate, N-methoxyethyl-N-methyl pentafluoropropylcarbamate, N-methoxymethyl-N-methyl pentafluoropropylcarbamate, N-methoxymethyl pentafluoropropylcarbamate, N-methoxymethyl-N-ethyl pentafluoropropylcarbamate, N-methoxyethyl-N-ethyl pentafluoropropylcarbamate, N-methoxyethyl hexafluoro-2-propylcarbamate, N-methoxyethyl-N-methyl hexafluoro-2-propylcarbamate, N-methoxymethyl-N-methyl hexafluoro-2-propylcarbamate, N-methoxymethyl hexafluoro-2-propylcarbamate, N-methoxymethyl-N-ethyl hexafluoro-2-propylcarbamate and N-methoxyethyl-N-ethyl hexafluoro-2-propylcarbamate. The negative ion of lithium salt is fluoride, chloride, bromide, iodide, nitrate, tetrafluoroborate, perchlorate, hexafluorophosphate and isocyanate. The halogenated cyclic carbonate is ethylene dihalide carbonate of formula (II). The content of halogenated cyclic carbonate is 2-10 parts weight. The non-halogenated carbonate is chosen from polypropylene carbonate, ethylene carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, butylene carbonate, methylpropyl carbonate, ethylpropyl carbonate and ethyl methyl carbonate. The electrolyte further contains vinylene carbonate.X,Y'=H, chloro or fluoro, both are not H simultaneously.