By mmillikin Although silicon is a very attractive anode material because of its higher energy density, its huge volume change over repeated charge−discharge cycles rapidly degrades cycle life. As an alternative approach to mitigate the well-known drawbacks of silicon while retaining the energy density advantages, silicon monoxide (SiOx, x ≈ 1) has become attractive as well (e.g., earlier post).
SiOx offers high reversible specific capacity and improved cyclic performance; however, it still suffers from inevitable volumetric changes and poor electrical conductivity. A number of research efforts have tackled those challenges as well. Now, separate research teams in China and the US report two
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