title: High-Performance One-Body Core/Shell Nanowire Supercapacitor Enabled by Conformal Growth of Capacitive 2D WS2Layers.
abstract: Two-dimensional (2D) transition-metal dichalcogenides (TMDs) have emerged as promising capacitive materials for supercapacitor devices owing to their intrinsically layered structure and large surface areas. Hierarchically integrating 2D TMDs with other functional nanomaterials has recently been pursued to improve electrochemical performances; however, it often suffers from limited cyclic stabilities and capacitance losses due to the poor structural integrity at the interfaces of randomly assembled materials. Here, we report high-performance core/shell nanowire supercapacitors based on an array of one-dimensional (1D) nanowires seamlessly integrated with conformal 2D TMD layers. The 1D and 2D supercapacitor components possess "one-body" geometry with atomically sharp and structurally robust core/shell interfaces, as they were spontaneously converted from identical metal current collectors via sequential oxidation/sulfurization. These hybrid supercapacitors outperform previously developed any stand-alone 2D TMD-based supercapacitors; particularly, exhibiting an exceptional charge-discharge retention over 30,000 cycles owing to their structural robustness, suggesting great potential for unconventional energy storage technologies.
authors.forename: Nitin
authors.initials: N
authors.lastname: Choudhary
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.affiliation: Analytical Research Division, Korea Basic Science Institute , Jeonju, Jeollabuk-do 54907, South Korea.
authors.forename: Hee-Suk
authors.initials: HS
authors.lastname: Chung
authors.forename: Julian
authors.initials: J
authors.lastname: Moore
authors.forename: Jayan
authors.initials: J
authors.lastname: Thomas
authors.forename: Yeonwoong
authors.initials: Y
authors.lastname: Jung
keywords: 2D TMD; WS2 core/shell nanowire; supercapacitor; tungsten disulfide