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Hierarchical TiO 2 /SnO 2 Hollow Spheres Coated with Graphitized Carbon for High‐Performance Electrochemical Li‐Ion Storage
Author(s) -
Xie Huiqi,
Chen Min,
Wu Limin
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201604283
Subject(s) - materials science , calcination , electrochemistry , anode , mesoporous material , chemical engineering , carbon fibers , nanocrystal , nanotechnology , ion , hydrothermal circulation , electrode , catalysis , composite number , composite material , organic chemistry , chemistry , engineering
A self‐templated strategy is developed to fabricate hierarchical TiO 2 /SnO 2 hollow spheres coated with graphitized carbon (HTSO/GC‐HSs) by combined sol–gel processes with hydrothermal treatment and calcination. The as‐prepared mesoporous HTSO/GC‐HSs present an approximate yolk‐double–shell structure, with high specific area and small nanocrystals of TiO 2 and SnO 2 , and thus exhibit superior electrochemical reactivity and stability when used as anode materials for Li‐ion batteries. A high reversible specific capacity of about 310 mAh g −1 at a high current density of 5 A g −1 can be achieved over 500 cycles indicating very good cycle stability and rate performance.