LISICON is an acronym for LIthium Super Ionic CONductor,[1] which refers to a family of solids with the chemical formula Li2+2xZn1−xGeO4.
[2][3][4][5] LISICONs readily react with lithium metal and atmospheric gases such as CO2; as a result, their conductivity decreases with time.
[6] There are other LISICON type solid electrolytes which make use of other elements to achieve higher ionic conductivities.
There are two compositions, Li3.5Ge0.5V0.5O4 and Li3.6Ge0.6V0.4O4, which had ionic conductivities of 4*10−5 S/cm and 10−5 S/cm, an order of magnitude of improvement upon the base LISICON structure.
These materials show good thermal stability and are stable in contact with CO2 and ambient atmosphere, dealing with some problems extant with the original structure.