Understanding Functionalization of Titanium Carbide (MXene) with Quinones and Their Pseudocapacitance

• DOI: 10.1021/acsaem.0c00314
• Publication Date: 2020-04-28T20:56:03Z
• Authors: Muhammad Boota; Patrick Urbankowski; William Porzio; Luisa Barba; Naresh C. Osti; Markus Bleuel; Jong K. Keum; Eugene Mamontov
• Keywords: Surface Modification; Pseudocapacitance; Non-covalent interactions; MXenes

Here, the interaction mechanism of 1-aminoanthraquinone (AQ) on Ti3C2Tx MXene by noncovalent (AQ@Ti3C2Tx) and covalent (AQ-Ti3C2Tx) functionalization is reported. Spectroscopic, X-ray, scattering techniques confirmed AQ without its catalytic decomposition, resulting in intercalation with MXene. Diazonium reaction was further used to covalently functionalize molecules Optimized AQ-Ti3C2Tx freestanding electrodes ∼44 μm thickness delivered capacitance ∼300 F/g improved rate performance compared pristine counterpart (Ti3C2Tx) due carbonyl redox ionic transport between layers pillaring molecules.