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SEM image showing (a) Cross-sectional view of the FTO, spun coat layer, and nanofibers. (b) Hot-pressed and sintered nanofibers (c) and (d) TEM image of a single nanofiber at different magnification with the inset showing the SAED pattern. The polycrystalline rings in the SAED pattern correspond to anatase structure.
DSC equivalent circuit with the electrospun nanofiber/electrolyte interface represented as a transmission line.
EIS spectra of the electrospun nanofiber DSC in dark with forward bias of 0.7 (circles), 0.65 (squares), and 0.6 V (diamonds). Respective fits are shown as lines, CPE exponent .
[(a)–(c)] Fitted transmission line parameters normalized to layer thickness, (d) effective electron diffusion coefficient from EIS, (e) electron lifetime from EIS, and (f) electron lifetime from OCVD over a range of bias for the nanofiber DSC (filled circles) and the nanoparticle DSC from Ref. 9 (empty circles).
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