The effect of hydrazine intercalation on the structure and capacitance of 2D titanium carbide (MXene)

Herein we show that hydrazine intercalation into 2D titanium carbide (Ti 3 C 2 -based MXene) results in changes in its surface chemistry by decreasing the amounts of fluorine, OH surface groups and intercalated water. It also creates a pillaring effect between Ti 3 C 2 T x layers pre-opening the structure and improving the accessability to active sites. The hydrazine treated material has demonstrated a greatly improved capacitance of 250 F g −1 in acidic electrolytes with an excellent cycling ability for electrodes as thick as 75 μm. Herein we show that hydrazine intercalation into 2D titanium carbide (MXene) results in changes in materials surface chemistry by decreasing the amounts of fluorine, OH surface groups and intercalated water.