Porous g-C₃N₄ and MXene Dual-Confined FeOOH Quantum Dots for Superior Energy Storage in an Ionic Liquid.

ABSTRACT: Owing to their unique nanosize effect and surface effect, pseudocapacitive quantum dots (QDs) hold considerable potential for high-efficiency supercapacitors (SCs). However, their pseudocapacitive behavior is exploited in aqueous electrolytes with narrow potential windows, thereby leading to a low energy density of the SCs. Here, a film electrode based on dual-confined FeOOH QDs (FQDs) with superior pseudocapacitive behavior in a high-voltage ionic liquid (IL) electrolyte is put forward. In such a film electrode, FQDs are steadily dual-confined in a 2D heterogeneous nanospace supported by graphite carbon nitride (g-C₃N₄) and Ti-MXene (Ti₃C₂). Probing of potential-driven ion accumulation elucidates that strong adsorption occurs between the IL cati

SUBMITTER: Shi M 

PROVIDER: S-EPMC6974951 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature