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Two‐dimensional Fe 2 O 3 /TiO 2 Composite Nanoplates with Improved Lithium Storage Properties as Anodic Materials for Lithium‐Ion Full Cells
Author(s) -
Qu Dongyang,
Sun Zhonghui,
Gan Shiyu,
Gao Lifang,
Song Zhongqian,
Kong Huijun,
Xu Jianan,
Dong Xiandui,
Niu Li
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202001143
Subject(s) - anode , materials science , lithium (medication) , composite number , electrochemistry , cathode , chemical engineering , oxide , nanostructure , hydrothermal circulation , electrode , metal , nanotechnology , composite material , metallurgy , chemistry , medicine , engineering , endocrinology
The rapid capacity decay is one of the challenges for the anodes of metal oxides‐based lithium‐ion batteries (LIBs). Herein, we report a characteristic nanoplate‐structured metal oxide anode consisting of hexagonal Fe 2 O 3 and TiO 2 (denoted as Fe 2 O 3 /TiO 2 ) via a facile hydrothermal strategy. Owing to two‐dimensional (2D) structured and stable TiO 2 modifier, Fe 2 O 3 /TiO 2 composite demonstrates significantly improved electrochemical LIBs performances. The Fe 2 O 3 /TiO 2 composite material buffers the volume expansion of Fe 2 O 3 and improves the rate capability and cycling performances. Upon 1000 long‐term cycles, the anode electrode delivers high discharge capacity of 1056 mAh g −1 at 0.5 A g −1 . The full cell that is composed of Fe 2 O 3 /TiO 2 as the anode and commercial LiFePO 4 as the cathode delivers superior rate capacity (84 mAh g −1 at 2 A g −1 ) and stable cycle capacity (132 mAh g −1 at 0.1 A g −1 after 150 cycles). This 2D composite nanostructure offers an approach to improve the metal oxide‐based anodes of LIBs.