Fig. 1. Schematic diagram of the preparation route of Ti₃C₂T_x/rGO composite aerogel via γ-ray radiation method

Fig. 2. Photograph of M/rGO-75 composite hydrogel (a) prepared by γ-ray radiation method; photograph of M/rGO-75 composite aerogel (b) after freeze-drying; XRD spectra (c) and Raman spectra (d) of different composite aerogels prepared at different absorbed doses; XPS spectra and C 1s peak fitting of M/rGO-50 (e),M/rGO-75 (f),M/rGO-100 (g) and M/rGO-125 (h) composite aerogels

Fig. 3. SEM images of M/rGO-50 (a),M/rGO-75 (b),M/rGO-100 (c),and M/rGO-125 (d) composite aerogels

Fig. 4. XRD spectra of few-layer Ti₃C₂T_x,GO,rGO-75 aerogel,and M/rGO-75 composite aerogel (a); the Raman spectra (b) and FTIR spectra (c) of GO,rGO-75 aerogel,and M/rGO-75 composite aerogel

Fig. 5. SEM images of GO (a),rGO-75 (b) aerogel,and M/rGO-75 (c) composite aerogel; distribution of Ti,C,and O elements in M/rGO-75 composite aerogel (d); TEM image (e),HRTEM image (f),and distribution of Ti,C,and O elements in M/rGO-75 composite aerogel (g)

Fig. 6. XRD spectra of rGO-75 aerogel,H-rGO-75 aerogel,M/rGO-75 composite aerogel and H-M/rGO-75 composite aerogel (a); Raman spectra (b) and FTIR spectra (c) of rGO-75 aerogel,H-rGO-75 aerogel,and H-M/rGO-75 composite aerogel; TGA curves of different samples (d); XPS full spectra of GO,rGO-75 aerogel and H-M/rGO-75 composite aerogel (e); XPS C 1s peak fitting diagram of GO (f),rGO-75 (g),H-rGO-75 (h) aerogel and H-M/rGO-75 composite aerogel (i)

Fig. 7. SEM images of H-rGO-75 aerogel (a) and H-M/rGO-75 composite aerogel (b)

Fig. 8. CV curves (a) and GCD curves (b) of GO,rGO-75 aerogels and composite aerogels prepared at different absorbed doses,mass specific capacitance values ​​of samples prepared at different absorbed doses calculated by GCD and CV respectively (c); CV curves (d),GCD curves (e) and mass specific capacitance (f) values ​​calculated by GCD and CV respectively of rGO-75,H-rGO-75 aerogels and M/rGO-75,H-M/rGO-75 composite aerogels; CV curves of H-M/rGO-75 composite aerogel (g) at different scan rates,GCD curves at different current densities (h),and mass specific capacitance calculated from GCD curves (i) (compared with H-rGO-75 aerogel)(color online)

Fig. 9. Nyquist plots of GO,rGO-75 aerogels and composite aerogels prepared at different absorbed doses (a); nyquist plots of rGO-75,H-rGO-75 aerogels and M/rGO-75,H-M/rGO-75 composite aerogels (frequency: 10⁶-10^-2 Hz) (b); equivalent circuit diagram of supercapacitors (c); specific capacitance retention of H-rGO-75 aerogel and H-M/rGO-75 composite aerogel during 10 000 GCD cycles at a current density of 1 A/g (d)