Achieving ultrahigh electrochemical performance by surface design and nanoconfined water manipulation.

ABSTRACT: The effects of nanoconfined water and the charge storage mechanism are crucial to achieving the ultrahigh electrochemical performance of two-dimensional transition metal carbides (MXenes). We propose a facile method to manipulate nanoconfined water through surface chemistry modification. By introducing oxygen and nitrogen surface groups, more active sites were created for Ti₃C₂ MXene, and the interlayer spacing was significantly increased by accommodating three-layer nanoconfined water. Exceptionally high capacitance of 550 F g^-1 (2000 F cm^-3) was obtained with outstanding high-rate performance. The atomic scale elucidation of the layer-dependent properties of nanoconfined water and pseudocapacitive charge storage was deeply probed through a comb

SUBMITTER: Li H 

PROVIDER: S-EPMC9166535 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature