TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The ionic compound having anions other than PF6- is an ionic compound having BF4-. The electrochemical active substance of the anode is LiaCobNi1-bO2 or Li1-cMn2-d(D)dO4, where a is greater than 0 and at most 1, b is 0-1, c is 0-1, d is greater than 0 and at most 0.5, and (D) is nickel, molybdenum, iron and/or chromium. A binder comprising the ionic conductive polymer compound and an organic compound arbitrarily dissolved and/or dispersed in the solvent with electronic conductive substance, is contained.
EXAMPLE - Liquid paraffin (70 wt.%) having viscosity of 75.8 cSt at 37.8 degreesC was added into polyethylene (27.3 wt.%) having melt index of 0.25 g/10 minutes under a load of 5 kg at 190 degreesC. The mixture was extruded to form a sheet having thickness of 290 mum. The sheet was immersed into 1,1,1-trichloroethane for 20 minutes and liquid paraffin was removed. The film was dried to form a rolling membrane. The membrane was drawn to form a porous film. The formed porous film had thickness of 38 mum, porosity of 53%, elasticity of 10000 kgf/cm2 according to ASTM D 882, average pore size of 0.16 mum based on ASTM F 316-80, maximum pore size of 0.32 mum based on ASTM D 128-61 and electrical resistance of 2.6 Ohm.cm2.
TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Electrode: The nitrogen atom which composes C5N has 2 electrons in the 2S orbital and 3 electrons in the 2P orbital and the carbon atom has 2 electrons in the 2S orbital and 2 electrons in the 2P orbital. EXAMPLE - A mixture is made by mixing 1g of tetrafluoroethylene polymer as binder to 10g C5N, and 0.1g of this mixture is press molded to a diameter of 17.5mm to form a C5N electrode which is placed in a case. A microporous polypropylene separator is placed on the C5N electrode. Propylene carbonate in which lithium perchlorate (1mol/l) is dissolved, is used as a non-aqueous electrolyte and impregnated into the separator. A coin-type non-aqueous secondary battery is produced by applying metal lithium of diameter 17.5mm to the inside, and placing a sealing plate by attaching a polypropylene gasket to the outer periphery side.