Facile synthesis of colloidal nitrogen‐doped titanium carbide sheets with enhanced electrochemical performance

• DOI: 10.1002/cey2.51
• Publication Date: 2020-05-26T07:15:46Z
• Authors: Tianlun Qiu; Guohui Li; Yuanlong Shao; Kun Jiang; Fangfang Zhao; Fengxia Geng
• Keywords: MXenes; Titanium carbide; Heteroatom

Abstract Heteroatom nitrogen doping in two‐dimensional transition metal carbides, known as MXenes, has been considered a promising strategy for modulating their electronic structure and electrochemical reactivity. While high‐temperature annealing the presence of source one popular method to introduce nitrogen, exfoliated multilayered MXenes typically brings about incomplete delamination treatment delaminated monolayer often leads irreversible restacking. Here, starting from typical carbide precursor, we developed an aqueous colloid containing monolayered nitrogen‐doped titanium sheets with excellent dispersity stability. This achievement is critically dependent on retaining hydrophilic surface host layers during treatment. The successful realization into individual MXene monolayers resulted enhanced electrical conductivity redox reactivity, which sample exhibited capacitive performance (586 F/g at scan rate 5 mV/s) cycling stability (capacitance retention 96.2% after 10 4 cycles A/g). paper presents feasible simple designing colloid, promises its facile uses liquid phase engineering techniques toward versatile applications.