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Lithium ion conductivity of a lithium compound is known to be influenced by an inert, non-lithium ion conductor additive. This paper reports an investigation of the effects of boron nitride (BN) addition to the conductivity of lithium iodide (Lil). The Lil:BN stoichiometry and heat treatment parameters (temperature and time) have been used as variables. It will be shown that lithium conductivity is strongly dependent upon heat treatment parameters. The activation energy for lithium ion transport also decreases with the addition of BN. Further analysis of activation energy data suggests that lithium ion motion takes place through interfacial regions of Lil and BN phases.

With surging interest in high energy density solid state lithium rechargeable batteries and discoveries of high voltage cathode materials such as LiMn2O4 and LiCO2, it is imperative that useful solid electrolytes possess a voltage window of about 5 volts. These solid electrolytes after being assembled into a cell will be subjected to a dc bias potential equal to cell voltage. The ability of composite electrolytes to withstand the dc potential has been determined, discussed, and presented. The experimental data include linear sweep and cyclic voltammetry measurements. The data are analyzed in terms of dielectric breakdown, ionization, and electrodic reactions.

This paper presents and discusses attributes of polymer-ceramic (PEO:LiBF4-Li3N and PEO:LiBF4-TiO2) and ceramic-ceramic (Li3N-LiPO3, and Li3N-TiO2) composite electrolytes. The polymer-ceramic type of electrolytes have been investigated by some researchers around the world and they provide certain advantages over the polymer electrolytes. This work specifically covers the effect of annealing on the conductivity of the aforementioned electrolytes. Although the history of ceramic-ceramic composite electrolyte is older than that of polymer-ceramic electrolytes, it has received very little attention in recent years. This paper presents some promising avenues and preliminary electrochemical data on ceramic-ceramic composite electrolytes.

This paper presents a state-of-the-art report on polymer battery development. The research and development activities related to materials of construction for battery components, i.e., anode, electrolyte, and cathode are reviewed. Major achievements have been accomplished in the last decade and the progress is very encouraging. Some potential problems have been identified and these problems may require significant development efforts before polymer batteries become a commercial reality.