Preparation and electrochemical properties of AL and LI-AL alloys coated by polyacetylene

Summary form only given. We fabricated negative electrodes wich consisted of Al or LiAl alloy on a stainless support coated by polyacetylene filat. Acetylene was polymerised directly on metal surface using Ti(OBu)/sub 4/ -polyisobutylalumoxane (m.w.960) as a catalyst. Polymer adhesion was very strong owing to chemical binding of catalyst components with metal surface. Cycle voltammograms of the electrodes in 1M LiC10/sub 4/ (PC+DME(1:1) or 1M LiBF/sub 4/ (PC+DME (1:1)showe a pairr of waves at 0, 5V and 1, 08V (VS.Li/Li//sup +/) and a pair of waves at 0, 15V and 0,6V, wich corresponded to intercalation/deintercalat Li/sup +/ into PA and into PA and into Al respectively. LiAl alloy, protected by PA film was applied as an anode material VS.V/sub 2/O/sub 5/ in 3M LiBF/sub 4/ in PC+DME (1:1) mixture. At cycling coulomb efficiency amounted to 98% at current density agual to 0,2 mA/sm/sup 2/ without dendrite formation and shedding during a long period of time. Thus, PA film acts as a poreless Li/sup +/ conducting membrane.