Here, we report the layer-by-layer (LbL) assembly of polyaniline (PANI) nanofibers and V2O5 to form nanostructured electrodes for electrochemical energy storage. PANI nanofibers impart electronic conductivity to otherwise non-conductive V2O5 and assist in forming a highly porous structure.   V2O5 imparts a large theoretical capacity. The non-aqueous electrochemical response of the electrode possessed contributions from both PANI nanofibers and V2O5. The maximum capacity was 233 mAh/g at a current of 2�A/cm2, and no volumetric expansion was observed after charge/discharge cycling. V2O5 normally undergoes large expansions and contractions during cycling, but the porous structure of our electrode prevented degradation via volumetric expansion. The performance decreased only slightly after 100 cycles, which was attributed to the irreversible formation of the pernigraniline base form of polyaniline. This study indicates how LbL assembly can be used to fabricate high-performance electrodes.

Polyaniline nanofiber/vanadium pentoxide layer-by-layer electrodes for energy storage

245th National Meeting (2013)

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