Coupling High Rate Capability and High Capacity in an Intercalation-Type Sodium-Ion Hybrid Capacitor Anode Material of Hydrated Vanadate via Interlayer-Cation Engineering.

Layered metal vanadates with intercalation pseudocapacitive behaviors show great promise for applications in sodium-ion hybrid capacitor anode materials due to their large interlayer distances, which benefit the fast Na solid-state diffusion. However, their charge storage capacity is significantly constrained by the limited available sites that allow the intercalation of Na ions. In this work, by engineering the interlayer cations, NiZnVO·1.