1 research outputs found

    Distortion of Ions in Nanoporous Electrodes Revealed by in Situ X‑ray Absorption Spectroscopy

    No full text
    The local structure of an electrolyte ion, AsF<sub>6</sub><sup>–</sup>, in a nanoporous carbon electrode was investigated by in situ X-ray absorption spectroscopy (XAS), which was conducted at the As K-edge with a transmission method and a novel sample current method. In the transmission spectra, the absorption decreased with decreasing electrode potential, indicating the contribution of AsF<sub>6</sub><sup>–</sup> ions in and out of the nanopores. Differential transmission spectra demonstrated that AsF<sub>6</sub><sup>–</sup> ions in the nanopores exhibit the white line at lower photon energy compared to free ions, which was clearly demonstrated by the sample current spectra. The change in the absorption energy was explained by the deformation of ions in the nanopores with an assistance of FEFF calculation
    corecore