Probing local structures in (Ni/Co)‐codoped ZnO/PVDF composite flexible and freestanding films by using XAS and XPS studies

Abstract

Extended X‐ray absorption fine‐structure and X‐ray absorption near‐edge structure studies have been performed on five Ni/Co‐codoped ZnO/polyvinylidene fluoride composite flexible and freestanding films to probe the local structure surrounding the Zn, Co, and Ni sites. X‐ray photoelectron spectroscopy studies are also performed for throwing insight in charge states of Co and Ni being incorporated. X‐ray absorption near‐edge structure studies confirmed the incorporation of Co atoms at tetrahedral sites of the wurtzite host matrix. They acted as substitutional impurities without forming any detectable impurity phase or cobalt clusters.

Stable Silicon Anodes by Molecular Layer Deposited Artificial Zincone Coatings

“…During lithiation, the Zn K‐edge moves to a lower energy, and the peak intensity decreases, indicating the reduction of zinc. [ 31 ] During delithiation, the Zn K‐edge moves to a higher energy, and the peak intensity increases in Figure 3d, indicating the electronic loss of Zn. Figure 3e shows the derivative curves of the XAS absorption spectra, and the position of the strongest peak can reflect valence state of zinc.…”