| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
d-Spacing Effect on the Electrochemical Performance of MXene in Organic and Room Temperature Ionic Liquids |
| Author(s) |
Kun Liang, Naresh Osti, Eugene Mamontov, Bishnu Thapaliya, Sheng Dai, Michael Naguib |
| On-Site Speaker (Planned) |
Kun Liang |
| Abstract Scope |
MXenes exhibit excellent capacitance at high rates in aqueous electrolytes specially in H2SO4 aqueous electrolyte, but in a narrow potential window, which limits the energy density. Moreover, oxidation of Ti3C2 under high anodic potentials in aqueous electrolytes further limits its use to cathodes of asymmetric devices. Organic electrolyte and room temperature ionic liquids (RTIL) can provide higher potential window, leading higher energy density and open circuit potential. In this work, different chain length alkylammonium cations were intercalated into Ti3C2Tz, producing different interlayer spacing (d-spacing). 1 M 1-ethly-3-methylimidazolium bis-(trifluoromethylsulfonyl)-imide (EMITFSI) in acetonitrile (ACN) and neat EMITFSI were employed as electrolytes to investigate the d-spacing effects on electrochemical performance for three-electrode system. As a result, alkylammonium cations intercalated Ti3C2Tz, AA-Ti3C2, provides much broad operating window, showing much higher specific capacitances, energy/power densities, and cycling stability than pristine Ti3C2Tz in 1 M EMITFSI/ACN organic electrolyte and neat EMITFSI RTIL electrolyte. |