[AlexanderHowl]

Antilithium should not really have any benefits (antimatter-matter reactions become problematic because of kaon, muon, and pion radiation after they get beyond position-electron reactions [which are the only antimatter reactions that just produce gamma rays]), and it should be even more expensive than antihydrogen by orders of magnitude. Unless you are able to harvest it from a natural source (which would require very high levels of superscience to avoid becoming annihilated the moment you started mining), you would have to create antihydrogen and then fuse antihydrogen to antilithium. You would have to have a fusion reactor that could not only do proton-proton reactions but could do so using antiprotons. Is it possible? Yes, but it is not plausible by any conceivable level of technology.