High-Performance One-Body Core/Shell Nanowire Supercapacitor Enabled By Conformal Growth Of Capacitive 2D Ws2 Layers

Keywords

2D TMD; supercapacitor; tungsten disulfide; WS core/shell nanowire 2

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.

Publication Date

12-27-2016

Publication Title

ACS Nano

Volume

10

Issue

12

Number of Pages

10726-10735

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/acsnano.6b06111

Socpus ID

85008331118 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85008331118

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