Porous hollow α-Fe2O3@TiO2 core-shell nanospheres for superior lithium/sodium storage capability

被引：85

作者：

Fu, Yanqing ^{[1
]}

Wei, Qiliang ^{[2
]}

Wang, Xianyou ^{[1
]}

Shu, Hongbo ^{[1
]}

Yang, Xiukang ^{[1
]}

Sun, Shuhui ^{[2
]}

机构：

[1] Xiangtan Univ, Sch Chem, Hunan Prov Key Lab Electrochem Energy Storage & C, Key Lab Environm Friendly Chem & Applicat,Minist, Xiangtan 411105, Hunan, Peoples R China

[2] Inst Natl Rech Sci Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 26期

基金：

中国国家自然科学基金;

关键词：

SODIUM-ION BATTERIES; HIGH-PERFORMANCE ANODE; IN-SITU SYNTHESIS; GRAPHENE NANOSHEETS; ENERGY-STORAGE; ANATASE TIO2; SPHERES; HETEROSTRUCTURES; COMPOSITE; NANORODS;

D O I：

10.1039/c5ta02994e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Porous hollow alpha-Fe2O3@TiO2 core-shell nanospheres for use as anode materials in lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) have been successfully fabricated by a simple template-assisted method, which has been rarely reported before. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N-2 adsorption-desorption isotherms reveal that the as-prepared alpha-Fe2O3@TiO2 is composed of a hollow inner cavity and an outer shell with massive mesopores. This porous hollow structure is capable of buffering the large volume variation of alpha-Fe2O3 during cycling and preventing the electrode from pulverization and aggregation, as well as providing sufficiently large interstitial space within the crystallographic structure to host alkalis (Li and Na). As a consequence, this hybrid composite exhibits outstanding electrochemical properties, e.g., high specific capacity, excellent cyclability, satisfactory rate performance, and splendid initial coulombic efficiency for both LIBs and SIBs.

引用

页码：13807 / 13818

页数：12

共 51 条

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