(US5124075-A)      Electroconductive sheet has a thickness between 10-200 microns comprising between 5-60 wt.% carbon fibrils having dias. within the range 0.0036-0.05 microns and length to dia. ratios of at least 5 in an electrically insulating polymer material.    USE/ADVANTAGE -   The electroconductive sheets are particurly useful as collector sheets for batteries. The sheets have superior adhesive characteristics and electrical conductivities. In addn., they do not cause swelling or deterioration by contacting with an electrolyte for a long period of time.    (RU2099805-C1)      An electroconductive sheet, 10-200 microns thick, comprises C fibrils having diameters 0.0036-0.5 microns, and length to dia. ratios of at least 5, in an electrically insulating polymer material.    USE/ADVANTAGE -   Electroconductive sheets of uniform thickness and free from flaws are obtd. which provide good electrical contact when used as a collector sheet for batteries.    In an example, an electrically insulating polymer cpd. e.g. SBS, was dissolved in toluene to give a 10 wt.% soln. Carbon fibrils, 0.015 microns dia., 2 microns length were added to the soln. in concns. between 10-50 wt.% against SBS. The mixt. was kneaded, 2 hrs., using a ball mill. Electroconductive sheets were obtd. by coating a polyester film, covered with a releasing agent, and air followed by vacuum drying.    (JP3029115-B2)      An electroconductive sheet, 10-200 microns thick, comprises C fibrils having diameters 0.0036-0.5 microns, and length to dia. ratios of at least 5, in an electrically insulating polymer material.    USE/ADVANTAGE -   Electroconductive sheets of uniform thickness and free from flaws are obtd. which provide good electrical contact when used as a collector sheet for batteries.    In an example, an electrically insulating polymer cpd. e.g. SBS, was dissolved in toluene to give a 10 wt.% soln. Carbon fibrils, 0.015 microns dia., 2 microns length were added to the soln. in concns. between 10-50 wt.% against SBS. The mixt. was kneaded, 2 hrs., using a ball mill. Electroconductive sheets were obtd. by coating a polyester film, covered with a releasing agent, and air followed by vacuum drying.