Abstract:
The paper presents the results of the use of iron nanotubes as the anode material of lithiumion batteries. To assess the degradation of the morphology of nanostructures after different numbers
of cycles of life tests, the method of scanning electron microscopy, Mossbauer spectroscopy, and X-ray
diffraction analysis were applied. It is shown that the decrease in discharge capacity starts at the 380th
cycle and is caused by the onset of degradation processes of nanostructures due to the formation of
amorphous inclusions and an increase in macrostresses and distortions in the structure. The complete
degradation of the structure is observed after the 492nd life cycle test. According to the data obtained
by Mossbauer spectroscopy, it has been established that an increase in life cycles leads to an increase in
contribution of partial spectrum characteristic of a paramagnetic state. That indicates an increase in
degradation rate of nanostructures and an increase in the content of impurity inclusions and amorphous
formations in the crystal structure.
