1D/2D heterostructure induced built-in electric field accelerate the reaction kinetics of MnO2/MXene paper-like film for advanced flexible zinc-ion batteries

•The 1D/2D MnO2/MXene heterostructures generate built-in electric fields that greatly accelerating the ionic and electronic diffusion/transport kinetics.•The synergistic mechanism generated by 1D/2D heterostructures achieve the balance between high energy storage activity and high active substance proportion of MnO2/MXene flexible electrode.•The quasi-solid-state FZIBs with MnO2/MXene paper-like film provide high total specific capacity and stability in flexible applications.