Premium
Ice Templated Free‐Standing Hierarchically WS 2 /CNT‐rGO Aerogel for High‐Performance Rechargeable Lithium and Sodium Ion Batteries
Author(s) -
Wang Ye,
Kong Dezhi,
Shi Wenhui,
Liu Bo,
Sim Glenn Joey,
Ge Qi,
Yang Hui Ying
Publication year - 2016
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201601057
Subject(s) - materials science , aerogel , anode , faraday efficiency , graphene , nanotechnology , electrochemistry , lithium (medication) , carbon nanotube , nanostructure , oxide , chemical engineering , electrode , metallurgy , medicine , chemistry , engineering , endocrinology
A hybrid nanoarchitecture aerogel composed of WS 2 nanosheets and carbon nanotube‐reduced graphene oxide (CNT‐rGO) with ordered microchannel three‐dimensional (3D) scaffold structure was synthesized by a simple solvothermal method followed by freeze‐drying and post annealing process. The 3D ordered microchannel structures not only provide good electronic transportation routes, but also provide excellent ionic conductive channels, leading to an enhanced electrochemical performance as anode materials both for lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs). Significantly, WS 2 /CNT‐rGO aerogel nanostructure can deliver a specific capacity of 749 mA h g −1 at 100 mA g −1 and a high first‐cycle coulombic efficiency of 53.4% as the anode material of LIBs. In addition, it also can deliver a capacity of 311.4 mA h g −1 at 100 mA g −1 , and retain a capacity of 252.9 mA h g −1 at 200 mA g −1 after 100 cycles as the anode electrode of SIBs. The excellent electrochemical performance is attributed to the synergistic effect between the WS 2 nanosheets and CNT‐rGO scaffold network and rational design of 3D ordered structure. These results demonstrate the potential applications of ordered CNT‐rGO aerogel platform to support transition‐metal‐dichalcogenides (i.e., WS 2 ) for energy storage devices and open up a route for material design for future generation energy storage devices.