In situ aniline polymerization during NH4V4O10 lattice formation achieves a high-performance hybrid cathode for aqueous zinc-ion batteries

Abstract

Using NH₄VO₃ as both the precursor and oxidizing agent, polyaniline (PANI) is in situ synthesized within NH₄V₄O₁₀ (NVO) crystal interlayers via a one-step hydrothermal method. The expanded lattice spacing, abundant oxygen vacancies and reduced electrostatic attraction endow the NVO/PANI cathode with an enhanced capacity of 350 mA h g⁻¹ at 0.1 A g⁻¹, as well as 87% capacity retention after 500 cycles at 1 A g⁻¹.