Fig. 2: Characterization of PMPP porous conductive hybrid sponge film.

a TEM (Scale bars: 400 nm), b AFM image (Scale bars: 500 nm) and c XRD patterns of MXene nanosheets. d SEM image of PMPP (large view) (Scale bars: 500 μm). Enlarged SEM images of e PU, f PM, g PMP and h PMPP (Scale bars: 100 μm). i N-, Si-, F-, and Ti- element mappings of PMPP. j Images and data for water contact angle of PU, PM, PMP, and PMPP. k TGA curves of PU, PM, PMP, and PMPP. l XPS patterns of PMP and PMPP (Inset: details of N1s curves for PMP and PMPP). m FT-IR spectra of MXene, PDA, PU, PM, PMP, PMPP.