Constructing C–O–Mn Interface via Graphene Nanoribbons to Enable a Breakthrough in Low-Valent Manganese Oxide Aqueous Zinc-Ion Battery Cathodes

To tackle the constraint of insufficient cathode diversity in conventional aqueous zinc-ion batteries (AZIBs), this study fabricates a C-O-Mn interface via the self-assembly of graphene nanoribbons (GNRs) with MnO, which drives the transformation of rock-salt MnO into polymorphic Mn_<i>x</i>O_<i>y</i> (including MnO₂, Mn-deficient Mn_<i>x</i>O, and MnOOH). The resulting Mn_<i>x</i>O_<i>y</i> features excellent Zn²⁺ affinity