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Rational Design of Hierarchical TiO 2 /Epitaxially Aligned MoS 2 –Carbon Coupled Interface Nanosheets Core/Shell Architecture for Ultrastable Sodium‐Ion and Lithium–Sulfur Batteries
Author(s) -
Yang Yong,
Wang Shitong,
Lin Sen,
Li Yutong,
Zhang Weiyu,
Chao Yuguang,
Luo Mingchuan,
Xing Yi,
Wang Kai,
Yang Chao,
Zhou Peng,
Zhang Yelong,
Tang Zilong,
Guo Shaojun
Publication year - 2018
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201800119
Subject(s) - materials science , polysulfide , nanotechnology , electrochemistry , carbon fibers , electrode , lithium (medication) , nanostructure , chemical engineering , energy storage , sulfur , nanowire , chemistry , composite material , electrolyte , metallurgy , medicine , composite number , endocrinology , power (physics) , physics , quantum mechanics , engineering
The development of electrode materials with superior cycling stability is currently receiving intensive research for next‐generation portable electronic equipment. Herein, a novel 3D hierarchical architecture composed of TiO 2 /epitaxially aligned MoS 2 –carbon coupled interface nanosheets is reported for boosting sodium‐ion storage and lithium–sulfur batteries, in which the MoS 2 nanosheets are epitaxially aligned grown on the surface of carbon nanosheets through a simple calculation conversion process. The resulting hybrid demonstrates ultralong‐life performance for sodium‐ion storage and lithium–sulfur batteries, owing to synergistic effects among the stable TiO 2 nanowires, the high‐conductivity carbon nanosheets, and the vertical MoS 2 nanostructure. Even at a high current density of 8 A g −1 , the capacity can be maintained at 169 mA h g −1 after 15 000 cycles, one of the highest values for TiO 2 ‐based electrodes. Moreover, such peculiar sheet‐on‐sheet structure also brings benefits for lithium–sulfur batteries, providing an effective physical shield against polysulfide shuttling and chemical adsorption of polysulfides, with a low fading rate (0.039% per cycle over 1500 cycles). The present work highlights that this rationally designed hybrid nanoarchitecture is an effective strategy to boost the stability of electrochemical energy storage.