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3D Starfish‐Like FeOF on Graphene Sheets: Engineered Synthesis and Lithium Storage Performance
Author(s) -
Zhai Jingru,
Lei Zhengyu,
Sun Kening
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201900948
Subject(s) - graphene , materials science , lithium (medication) , nanotechnology , oxide , electrical conductor , thermal stability , nanostructure , electrode , chemical engineering , composite number , composite material , chemistry , metallurgy , medicine , endocrinology , engineering
Abstract To address the problems associated with poor conductivity and large volume variation in practical applications as a conversion cathode, engineering of hierarchical nanostructured FeOF coupled with conductive decoration is highly desired, yet rarely reported. Herein, 3D starfish‐like FeOF on reduced graphene oxide sheets (FeOF/rGO) is successfully prepared, for the first time, through a combination of solvothermal reaction, self‐assembly, and thermal reduction. Integrating the structural features of the 3D hierarchical nanostructure, which favorably shorten the path for electron/ion transport and alleviate volumetric changes, with those of graphene wrapping, which can further enhance the electrical conductivity and maintain the structural stability of the electrode, the as‐prepared FeOF/rGO composite exhibits a superior lithium‐storage performance, including a high reversible capacity (424.5 mA h −1 g −1 at 50 mA g −1 ), excellent stability (0.016 % capacity decay per cycle during 180 cycles), and remarkable rate capability (275.8 mA h −1 g −1 at 2000 mA g −1 ).