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Rationally Designed Hierarchical TiO 2 @Fe 2 O 3 Hollow Nanostructures for Improved Lithium Ion Storage
Author(s) -
Luo Jingshan,
Xia Xinhui,
Luo Yongsong,
Guan Cao,
Liu Jilei,
Qi Xiaoying,
Ng Chin Fan,
Yu Ting,
Zhang Hua,
Fan Hong Jin
Publication year - 2013
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.201200953
Subject(s) - materials science , nanostructure , anode , fabrication , nanotechnology , lithium (medication) , atomic layer deposition , electrochemistry , current density , oxide , chemical engineering , layer (electronics) , electrode , metallurgy , medicine , chemistry , alternative medicine , physics , pathology , endocrinology , quantum mechanics , engineering
Hollow and hierarchical nanostructures have received wide attention in new‐generation, high‐performance, lithium ion battery (LIB) applications. Both TiO 2 and Fe 2 O 3 are under current investigation because of their high structural stability (TiO 2 ) and high capacity (Fe 2 O 3 ), and their low cost. Here, we demonstrate a simple strategy for the fabrication of hierarchical hollow TiO 2 @Fe 2 O 3 nanostructures for the application as LIB anodes. Using atomic layer deposition (ALD) and sacrificial template‐assisted hydrolysis, the resulting nanostructure combines a large surface area with a hollow interior and robust structure. As a result, such rationally designed LIB anodes exhibit a high reversible capacity (initial value 840 mAh g −1 ), improved cycle stability (530 mAh g −1 after 200 cycles at the current density of 200 mA g −1 ), as well as outstanding rate capability. This ALD‐assisted fabrication strategy can be extended to other hierarchical hollow metal oxide nanostructures for favorable applications in electrochemical and optoelectronic devices.