Table 1.

Mole number of functional groups in MXenes (O)_x (OH)_y (F)_z (H₂O)_u (ion)_v

Vapor pressure	Temperature	Ti3C2Tx	Li- Ti3C2Tx	K-Ti3C2Tx
UHV (as-prepared)	25 ${}^{°}$C	O0.7OH0.5F1H2O0.3	O0.8OH0.7 F0.8 H2O0.4 Li0.3	O0.8 OH0.5 F0.9 H2 O0.3 K0.4
	200 ${}^{°}$C	O0.6 OH0.5 F0.9 H2 O0.2	O0.7 OH0.6 F0.7 H2 O0.2 Li0.3	O0.9 OH0.3 F0.8 H2 O${}_{0.1}$ K0.4
100 mTorr	25 ${}^{°}$C	O0.8 OH0.5 F0.8 H2 O0.4	O0.7 OH0.6 F0.6 H2 O0.5 Li0.3	O0.9 OH0.3 F0.8 H2 O0.3 K0.4
	200 ${}^{°}$C	O0.7 OH0.5 F0.7H2O0.2	O0.7 OH0.5 F0.5 H2 O0.2 Li0.3	O0.8 OH0.2 F0.7 H2 O${}_{0.1}$ K0.4