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Three‐Dimensional Carbon@Fe 2 O 3 @SnO 2 Hierarchical Inverse Opals Arrays as Li–ion Battery Anode with Improved Cycling Life and Rate Capability
Author(s) -
Zhu Xiuting,
Ren Weina,
Cheng Chuanwei,
Yang Yaping
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700144
Subject(s) - anode , materials science , electrode , nanorod , composite number , carbon fibers , battery (electricity) , inverse , ion , chemical engineering , current density , electrical conductor , electrochemistry , nanotechnology , composite material , chemistry , power (physics) , physics , geometry , mathematics , organic chemistry , quantum mechanics , engineering
We report a novel three‐dimensional (3D) cabon@Fe 2 O 3 @SnO 2 hierarchical composite inverse opals arrays electrode for binder‐free Li‐ion battery anode. In this electrode design, the ordered macroporous SnO 2 acts as conductive skeletons for supporting the 1D Fe 2 O 3 nanorods, offering a high specific surface area and fast pathways for both electron and ion transport, while the carbon coated on the Fe 2 O 3 surfaces works as a buffer layer to improve the conductivity and structural stability. Benefiting from this smart design, the hierarchical carbon@Fe 2 O 3 @SnO 2 composite inverse opals electrode as a Li ion battery anode exhibits a high discharge capacity of 1021 mAh/g at a current density of 100 mA/g, better cycling life (capacity retaining at 388 mAh/g after 200 cycles) and excellent rate capability, which is superior to those of individual SnO 2 inverse opals and SnO 2 @Fe 2 O 3 inverse opals electrodes.