Enabling high content silicon anodes for Li-ion batteries has been a challenge decades. In this Review on page 16275 ff., B. Rage and co-workers highlight core-shell structures as potential solution. Covering the design, synthesis resulting properties of core-shells anodes, critical thinking outlook is also given.

Silicon anodes have been considered one of the most promising anode candidates for next generation high-energy density lithium-ion batteries due to high theoretical specific capacity (4200 mAh g−1) Si. However, lithiation endows silicon with severe volume expansion effects during charge/discharge cycling. The repeated expansions not only lead pulverization particles and separation electrode mat...