Activation of the Pseudocapacitive Behavior of MXene/PANI for High-Performance Ammonium-Ion Batteries.

ABSTRACT: The development of aqueous ammonium-ion batteries (AAIBs) requires electrode materials that combine high NH₄ ⁺ storage capacity with rapid and reversible ion transport. Herein, a metal-vacancy MXene/polyaniline (Mo_4/3CT_z/PANI) composite is reported, in which the pseudocapacitive response is synergistically activated by introducing 0.1 m H₂SO₄ into 1 m (NH₄)₂SO₄ electrolyte. This proton-assisted modulation enables rapid and reversible NH₄ ⁺/H₃O⁺ co-intercalation, in contrast to the negligible ion insertion observed in the absence of H₂SO₄. Combined experimental and density-functional theory (DFT) analyses reveal that proton dopi

SUBMITTER: Li Y 

PROVIDER: S-EPMC12631864 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature