image: (a) The atomic resolution HAADF images of three distinct phases with interlayer spacing of 1.29, 1.45 and 1.57 nm, respectively. (b) the local snapshot of Mn-MXene-N model with 3-layer (15.8 Å), 2-layer (14.4 Å) and 1-layer (13.0 Å) water in-between layer of MD simulation, with the probability density profiles of water molecules along the c lattice direction displayed on the left side. (c) The trends of the initial phase residue and capacitance enhancement of Mn-MXene-N during CV pre-cycles. (d) Low field 1H time-domain nuclear magnetic resonance…