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Phosphorus‐Functionalized Fe 2 VO 4 /Nitrogen‐Doped Carbon Mesoporous Nanowires with Exceptional Lithium Storage Performance
Author(s) -
Tao Yuanxue,
Yang Nan,
Liang Chennan,
Huang Dekang,
Wang Pei,
Cao Feifei,
Luo Yanzhu,
Chen Hao
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.202000198
Subject(s) - materials science , lithium (medication) , mesoporous material , carbon fibers , heteroatom , anode , phosphorus , doping , atomic layer deposition , transition metal , chemical engineering , inorganic chemistry , nanotechnology , electrode , composite number , layer (electronics) , catalysis , chemistry , metallurgy , composite material , optoelectronics , medicine , organic chemistry , engineering , endocrinology , ring (chemistry) , biochemistry
The binary transition metal oxides have attracted great attention because of their considerable energy and power densities. However, they suffer from low reaction kinetics and large volume change, limiting their practical energy applications. The construction of a mesoporous structure with a large surface area, the development of a carbon matrix, as well as heteroatom doping can effectively overcome the above challenges. Herein, the synthesis of phosphorous‐containing Fe 2 VO 4 /nitrogen‐doped carbon mesoporous nanowires (P‐Fe 2 VO 4 /NCMNWs) is reported. In this unique structure, the atomic‐level P‐doping could increase the conductivity of Fe 2 VO 4 by reducing its band gap, which is confirmed by DFT calculations. Furthermore, the phosphorus can covalently “bridge” the carbon layer and Fe 2 VO 4 through P−C and Fe−O−P bondings. As a result, this anode material exhibits a high capacity (1002 mA h g −1 at 0.5 A g −1 after 250 cycles), excellent rate performance (448 mA h g −1 at 10 A g −1 ), and prominent long‐term cycling stability (533 mA h g −1 at 5 A g −1 after 500 cycles, 364 mA h g −1 at 10 A g −1 after 1000 cycles). All of these attractive features make the P‐Fe 2 VO 4 /NCMNWs a promising electrode material for high‐performance lithium‐ion batteries.