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Hierarchical Fe 3 O 4 @FeS 2 Nanocomposite as High‐Specific‐Capacitance Electrode Material for Supercapacitors
Author(s) -
Liu Xuexia,
Liu Limin,
Yan Weiwei,
Wang Yinfeng,
Huang Chunfang,
Wang Zhijun
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000544
Subject(s) - supercapacitor , capacitance , materials science , electrode , nanocomposite , bimetallic strip , annealing (glass) , x ray photoelectron spectroscopy , nanotechnology , chemical engineering , composite material , metallurgy , chemistry , engineering , metal
Iron‐based materials are ideal faradaic electrodes for supercapacitors. However, boosting the specific capacitance and preparation with the simple method of iron‐based materials remains a great challenge. Herein, hierarchical Fe 3 O 4 @FeS 2 nanocomposites are constructed through an annealing strategy with monohydrate ferrous sulfate as the precursor. X‐ray diffractometry, high‐resolution transition electron, and X‐ray photoelectron spectroscopy results reveal that the hierarchical Fe 3 O 4 @FeS 2 nanocomposite is successively fabricated. The as‐prepared materials exhibit a remarkable specific capacitance of 597.1 F g −1 at a current density of 3 A g −1 as electrode materials of supercapacitors. Inspiringly, specific capacitance is superior to most iron‐based electrodes in previous reports. This may be ascribed to the junction at the interface of the different components and the efficient electron transfer of FeS 2 . This work is meaningful for the design and preparation of electrode materials with specific capacitance.