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A new 2D titanium carbide (Ti 3 C 2 ), a low dimensional material of the MXene family has attracted remarkable interest in several electronic applications, but its unique structure and novel properties are still less explored in piezoelectric energy harvesters. Herein, a systematic study has been conducted to examine the role of Ti 3 C 2  multilayers when it is incorporated in the piezoelectric polymer host. The 0.03 g/L of Ti 3 C 2  has been identified as the most appropriate concentration to ensure the optimum performance of the fabricated device with a generated output voltage of about 6.0 V. The probable reasons might be due to the uniformity of nanofiller distribution in the polyvinylidene difluoride (PVDF) and the incorporation of Ti 3 C 2  in a polymer matrix is found to enhance the β-phase of PVDF and diminish the undesired α-phase configuration. Low tapping frequency and force were demonstrated to scavenge electrical energy from abundant mechanical energy resources particularly human motion and environmental stimuli. The fabricated device attained a power density of 14 µW.cm −2  at 10.8 MΩ of load resistor which is considerably high among 2D material-based piezoelectric nanogenerators. The device has also shown stable electrical performance for up to 4 weeks and is practically able to store energy in a capacitor and light up a LED. Hence, the Ti 3 C 2 -based piezoelectric nanogenerator suggests the potential to realize the energy harvesting application for low-power electronic devices.

Exploration of 2D Ti3C2 MXene for all solution processed piezoelectric nanogenerator applications