A main object of the present invention is to provide a practical slurry having a polar solvent as the dispersion medium for a sulfide solid electrolyte material. The wire connector with easy entry includes an insulating tube with an outer corrugated surface and a soldering sleeve disposed in the insulating tube. Additional KEVLAR members may be aligned with the fibers and embedded in the PVC extrusion layer and the Kapton layers, thereby providing the fibers with additional protection from tensile loads. Correspondingly, the component can be deactivated and removed from service. The structure may comprise at least one agitating device for stirring up the materials inside the vessel so as to form a mixture containing the sediment materials which in turn contain the contaminants.