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Pseudocapacitive Trimetal Fe 0.8 CoMnO 4 Nanoparticles@Carbon Nanofibers as High‐Performance Sodium Storage Anode with Self‐Supported Mechanism
Author(s) -
Wu Lijun,
Yang Jinyu Ou,
Guo Shoujie,
Yao Liangxian,
Li Hao,
Zhang Shixing,
Yue Hongwei,
Cai Kun,
Zhang Chao,
Yang Changchun,
Cao Yuliang
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202001718
Subject(s) - materials science , anode , electrochemistry , chemical engineering , carbon nanofiber , nanofiber , calcination , electrospinning , carbon fibers , nanocrystal , nanoparticle , redox , oxide , electrode , nanotechnology , composite number , composite material , catalysis , carbon nanotube , biochemistry , chemistry , polymer , engineering , metallurgy
Trimetal Fe 0.8 CoMnO 4 (FCMO) nanocrystals with a diameter of about 50 nm perfectly embedded in N doped‐carbon composite nanofibers (denoted as FCMO@C) are successfully prepared through integrating double‐nozzle electrospinning with a drying and calcination process. The as‐prepared FCMO@C nanofibers maintain a high reversible capacity of 420 mAh g −1 and about 90% capacity retention after 200 cycles at 0.1 A g −1 . For a long‐term cycle, the FCMO@C electrode exhibits excellent cycling stability (87% high capacity retention at 1 A g −1 after 950 cycles). Kinetic analysis demonstrates that the electrochemical characteristics of the FCMO@C corresponds to the pseudocapacitive approach in charge storage as an anode for sodium ion batteries, which dominantly attributes the credit to FCMO nanocrystals to shorten the migration distance of Na + ions and the nitrogen‐doped carbon skeleton to enhance the electronic transmission and favorably depress the volume expansion during the repeated insertion/extraction of Na + ions. More significantly, a self‐supported mechanism via continuous electrochemical redox reaction of Fe, Co, and Mn can effectively relieve the volume change during charge and discharge. Therefore, this work can provide a new avenue to improve the sodium storage performance of the oxide anode materials.