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Sluggish divalent charges (e.g., Zn²⁺) diffusion within MXene host electrodes due to the larger sizes and stronger coulomb interactions compared to those of dominant univalent charges is an essential issue in developing MXene-based microsupercapacitors (MSCs) of higher theoretical energy densities. Herein, MXene/bacterial cellulose fiber (BCF) hybrid films with effectively expanded interlayer spacing between re-stacked few-layered MXene sheets via homogeneous intercalation of BCF nanospacer were designed and prepared. The electrochemical testing and molecular dynamics simulation demonstrated the consequently widened ions-transport-channels between few-layered MXene sheets can effectively reduce the diffusion barrier of Zn²⁺ within the MXene/BCF host electrodes compared to pure MXene film electrodes without BCF nanospacer. Further in-situ Raman and ex-situ XPS spectroscopy …