Considering the environmental
problems caused by a large amount
of cotton textile waste and its possible applications in flexible
electrodes, it is very promising to reuse the cotton textile waste
as an electrode material, reducing the cost of flexible electrodes
and alleviating environmental problems. In this work, we present a
rechargeable flexible Zn–air battery based on cotton textile
waste, which employs Ni-metallized cotton textile waste (NMCTW) as
a flexible substrate for Zn anodes and air cathodes. The transparent
NiFe hydroxide thin film horizontally grown on the surface of the
NMCTW substrate was synthesized in situ by the electrodeposition method,
which exhibits excellent catalytic activity because of the high surface
area of the two-dimensional (2D) thin film, large contact area between
the thin film and substrate, and fast charge transport of the 2D thin-film
structure. In view of the high catalytic performance of the NiFe hydroxide
thin film, it was used as the catalytic material of the air cathode
for the flexible Zn–air battery. The assembled Zn–air
battery based on cotton textile waste demonstrated a good rate performance
and outstanding charge and discharge cycling stability. The assembled
Zn–air battery was applied to power the light-emitting diode,
which exhibits exceptional flexibility and stable output power even
under severe mechanical bending deformation, proving the feasibility
for its application in flexible electronics.