Ion Transport Barriers In article number 2200658, Mei, Sun, and co-workers proposed a tin-extracted synthetic strategy for producing tin diselenide by using MAX-phase precursors. After coupled with graphene, the 2D heterostructure shows low surface/interface transport barriers in rechargeable Li-/Na-ion batteries.

Twisted tungsten diselenide bilayers host a variety of competing strongly correlated states, which can be understood from Hubbard model on the moir\'e scale. Examples include coupled spin- and charge-density waves as well unconventional superconductivity with mixed singlet triplet amplitudes.