articleAdvanced Energy MaterialsMay 28, 2015GREEN OA

Probing the Mechanism of High Capacitance in 2D Titanium Carbide Using In Situ X‐Ray Absorption Spectroscopy

MRMaria R. LukatskayaSBSeong‐Min BakXYXiqian YuXYXiao‐Qing YangMWMichel W. Barsoum

Drexel University · Brookhaven National Laboratory

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Abstract

Electrochemical in situ X-ray absorption spectroscopy (XAS) of 2D titanium carbide MXene is used to probe the mechanism of high capacitance of Ti3C2Tx MXene. Changes in the Ti oxidation state are detected during cycling, confirming that most of the capacitance of Ti3C2Tx is due to changes in the Ti oxidation state, i.e., pseudocapacitance.

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Topics & keywords

Topics
Keywords
  • Pseudocapacitance
  • X-ray absorption spectroscopy
  • Materials science
  • Capacitance
  • Titanium
  • Titanium carbide
  • Absorption (acoustics)
  • X-ray photoelectron spectroscopy
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