Flexible anodic SnO2 nanoporous structures uniformly coated with polyaniline as a binder-free anode for lithium ion batteries

Herein we report a wet-chemical process to obtain binder-free anodes for lithium-ion batteries (LIBs) using straightforward and easily scalable approach. Electrochemical deposition, anodization, electropolymerization are used firmly attach nanoporous flexible SnO2 film, uniformly coated with polyaniline (PANI), onto Cu substrate. The three-dimensional, flexible, SnO2@PANI electrodes exhibit good specific capacity, capacity retention, charge transfer resistance. Its favorable electrochemical properties attributed the large surface area, high electrical conductivity, effective reduction of volume expansion. These results demonstrate that proposed approach forming is promising strategy constructing high-performance emerging LIBs.