J. Popovic, G. Gregori
Salt containing liquid electrolytes show both cation and anion conductivity leading to concentration polarization effects, a severe problem in context of Li-based batteries. Such adverse effects can be circumvented through development of composite electrolytes in which porous insulating solid with favorable surface chemistry is covered by a thin layer of liquid electrolyte allowing for the overlap and percolation of highly Li+ conductive space charge zones.