Fabrication of hybrid tin oxide-cellulose nanocomposite as the
flexible and thin supercapacitor
Abstract
Microfibrillated cellulose (MFC) with reinforcing effects is a useful
building block in the fabrication of flexible and thin supercapacitors.
Herein, a hybrid tin oxide-cellulose nanocomposite was hydrothermally
produced and coated on MFC thin films to form a supercapacitor. The
hybrid tin oxide-cellulose thin films were structurally analyzed using
scanning electrode microscopy, Fourier transform infrared spectroscopy
and X-ray diffraction. The cellulose thin film with the highest loading
of hybrid tin oxide-cellulose nanocomposite exhibited a specific
capacitance of 225.88 F/g at 100 mV/s and 486.38 F/g at 20 mV/s in the
three-electrode electrochemical system. In addition, it revealed good
cyclic stability up to 40 cycles run continuously with 95% cyclic
retention. The high specific capacitance and superior cyclic stability
could be related to the enhanced charge mobility and ion diffusion
between the solid and electrolyte interface. The cellulose thin film
coated with flower-like hybrid nanocomposite showed great potential in
energy storage.