New Ti 3 C 2 aerogel as promising negative electrode materials for asymmetric supercapacitors

Novel 3D Ti3C2 aerogel has been first synthesized by a simple EDA-assisted self-assembly process. Its inside are channels and pores structure. The interconnected aerogel structure could efficiently restrain restacking of Ti3C2 flakes. Thus, it exhibits a large specific surface area as high as 176.3 m2 g−1. The electrochemical performances have been measured. The Ti3C2 aerogel achieves a quite high areal capacitance of 1012.5 mF cm−2 for the mass loading of 15 mg at a scan rate of 2 mV s−1 in 1 M KOH electrolyte. An asymmetric supercapacitor (ASC) has been assembled by using the Ti3C2 aerogel electrode as the negative electrode and electrospinning carbon nanofiber film as the positive electrode. The device can deliver a high energy density of 120.0 μWh cm−2 and a maximum power density of 26123 μW cm−2. A lamp panel with nineteen red light-emitting diodes has been powered by two ASCs in series.