Many C1b or Heusler compounds contain Li and therefore may be suitable as anode materials. First measurements of LiMgX (X= P, As, Sb, Bi) show very high ionic and electronic conductivity, hence making them promising materials that could be applied in batteries. Here we combine theoretical consideration with the synthesis and characterization of Li containing half-Heusler and Heusler compounds. Despite the high Lithium conductivity, the compounds show very often other interesting properties such as good high temperature thermoelectric properties in LiAlSi and half metallic ferromagnetism in Li1.5Mn0.5Sb. These materials open new properties interesting for application.