“…Amorphous germanium–silicon (Ge–Si) solid solutions are an interesting class of materials from both a fundamental and technological point of view. Although Ge–Si is a long-known alloy, it is classified as an emerging material due to the renewed interest in a variety of applications, including solar cells, thermoelectrics, photonics, spintronics, quantum computing, − and as an active material , in negative electrodes of lithium-ion batteries (LIBs). − For the last case, silicon, germanium, and, hence Ge–Si solid solutions react with lithium via an alloying/dealloying process that stores and delivers on average ten times more of Li + charge per atom than graphite, the anode material in commercial LIBs. − …”