(US4690840-A)      Prepn. of metallic alloys contg. (A) alkali (ne earth) metal and (B) host metal involves preparing an active organic soln. of (A) in metallic form and contacting it with an (A) source. A metallic structure contg. (B) is contacted with the soln. to form a superficial alloy of (A) and (B) with the metallic structure. The alloy has activity determined by that of the organic soln. The organic soln. then acts as transfer agent of the (A) towards the host metallic structure. (A) is e.g. Li; (B) is Cu, Al, Mo or Ni; and the solvent is THF, dioxolan, a glyme or a crown ether.    USE/ADVANTAGE -   Method is economical and easy to operate. Alloyed electrodes with high surfaces and with good electrochemical properties, e.g. cycling, for use in electrochemical generators with thin film polymer electrolytes are obtd. (16pp)e    (JP95107861-B2)      Prodn. of alloys (A) contg. an alkali(ne earth) metal (I) and a host metal (II) comprises contacting a (II)-contg. structure with an organic soln. of (I), this soln. being maintained in contact with a source of (I) until the alloy has formed. The activity of (A) is determined by that of the soln. being used to transfer (I). Also new are electrodes consisting of these alloyed structures in contact with a polymeric electrolyte (pref. a polyether) and high energy-density electrochemical generators contg. such electrodes.    USE/ADVANTAGE -   The method is simple, controllable and can be carried out at room temp. It allows thin electrodes of large surface area to be made. No penetration of electrolyte into the electrode occurs, so that formation of non-conducting layers is prevented. The electrodes do not require addn. of e.g. carbon additives.    (JP8102334-A)      Prodn. of alloys (A) contg. an alkali(ne earth) metal (I) and a host metal (II) comprises contacting a (II)-contg. structure with an organic soln. of (I), this soln. being maintained in contact with a source of (I) until the alloy has formed. The activity of (A) is determined by that of the soln. being used to transfer (I). Also new are electrodes consisting of these alloyed structures in contact with a polymeric electrolyte (pref. a polyether) and high energy-density electrochemical generators contg. such electrodes.    USE/ADVANTAGE -   The method is simple, controllable and can be carried out at room temp. It allows thin electrodes of large surface area to be made. No penetration of electrolyte into the electrode occurs, so that formation of non-conducting layers is prevented. The electrodes do not require addn. of e.g. carbon additives.    (JP3165003-B2)      Prodn. of alloys (A) contg. an alkali(ne earth) metal (I) and a host metal (II) comprises contacting a (II)-contg. structure with an organic soln. of (I), this soln. being maintained in contact with a source of (I) until the alloy has formed. The activity of (A) is determined by that of the soln. being used to transfer (I). Also new are electrodes consisting of these alloyed structures in contact with a polymeric electrolyte (pref. a polyether) and high energy-density electrochemical generators contg. such electrodes.    USE/ADVANTAGE -   The method is simple, controllable and can be carried out at room temp. It allows thin electrodes of large surface area to be made. No penetration of electrolyte into the electrode occurs, so that formation of non-conducting layers is prevented. The electrodes do not require addn. of e.g. carbon additives.