Polyaniline‐poly[p‐styrenesulfonic acid‐co‐methoxyoligo(ethylene glycol)acrylate] Composite Electrode for All‐Solid‐State Rechargeable Lithium Battery

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Abstract
Polyaniline‐poly[p‐styrenesulfonic acid‐co‐methoxy‐oligo(ethylene glycol)acrylate] composite (PANI‐PSSA‐co‐MOEGA) electrode was prepared for an all‐solid‐state rechargeable lithium battery and a Li/PANI‐PSSA‐co‐MOEGA model cell was fabricated by combining a cross‐linked polymer electrolyte. PSSA‐co‐MOEGA dopant has anchored anion sites (benzenesulfonic acid site) for doping polyaniline and oligo‐ethylene oxide side chains for improving the adhesion between the electrode and the polymer electrolyte. Li/PANI‐PSSA‐co‐MOEGA cell exhibited good cyclability and high capacity over 40 cycles. A model cell was also assembled by using a polyaniline electrode doped with perchlorate anion, , and the capacity of cell decreases over 10 cycles. The differences are caused by two factors. First, the PANI‐PSSA‐co‐MOEGA composite film became a partially cation‐doped type polymer (by doping polymer anion). Second, the interface between the PANI‐PSSA‐co‐MOEGA electrode and the polymer electrolyte is improved by incorporating the oligo‐ethylene oxide side chains in both materials. The diffusion rate of the dopant ions in PANI‐PSSA‐co‐MOEGA was faster than in the film.

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