Nonaqueous electrochemical cell and a method of manufacturing the same

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the invention are described below, taking a thionyl chloride-lithium cell as an example and referring to the accompanying drawing.
EXAMPLE 1 Referring to FIG.
1 which is a cross-section view showing a bobbin-shaped thionyl chloride-lithium electrochemical cell, the reference numeral 1 represents a stainless steel cell housing which serves as an anode terminal, and 2 represents a cylindrical metallic lithium element measuring 0.
85 mm thick, 37 mm long and 37 mm wide and fitted against the inner surface of said cell housing for functioning as an anode.
The reference numeral 3 represents a glass fiber separator containing 15 weight % of an arylic resin binder and measuring 0.
2 mm in thickness, and 4 represents a porous carbonaceous collector extrusion-molded from a well-kneaded mixture of 78 weight % acetylene black, 9 weight % artificial graphite, 13 weight % PTFE binder with water-ethanol and dried in vacuo at 150.
degree.
C.
for 12 hours.
The cathode is a cylinder, 10 mm in diameter and 30 mm high, with a porosity of 82%.
Represented by the numeral 5 is a stainless steel cell cover, the peripheral edge thereof being laser-welded to the open end of said cell housing 1.
Disposed in the center of said cell cover 5 is a hollow cathode terminal 7 insulated by glass wool 6.
This cathode terminal 7 is laser-melded, at its top, to a nail-shaped cathode collector 8.
Indicated at 9 is a liquid cathode-electrolyte.
This liquid is prepared by dissolving lithium tetrachloroaluminate (LiAlCl.
sub.
4) in thionyl chloride at a final electrolyte concentration of 1.
2 moles/liter and adding polyethylene terephthalate (PET) at a concentration of 0.
5 weight %.
The volume of the cathode active substance-electrolyte solution is 4.
0 ml.
The reference numerals 10 and 11 represent a top and a bottom separator, each made of the same glass fiber material as the separator 3.
EXAMPLE 2 An electrochemical cell was fabricated in the same manner as Example 1 except that a thionyl chloride solution containing 1