In:
ChemElectroChem, Wiley, Vol. 6, No. 20 ( 2019-10-15), p. 5203-5210
Abstract:
FeF 3 is favored by researchers because of its high theoretical specific capacity and high voltage. It is expected to be utilized as a cathode material for lithium‐ion batteries in the future. However, the poor electronic conductivity, inferior reaction kinetics, and severe volume expansion seriously prevents its practical application. Herein, a FeF 3 @N‐doped carbon nanocomposite was successfully produced by in situ fluorination and dehydration. In addition, the nanocomposite showed a reversible capacity of 84.9 mAh g −1 for 200th cycle after cycling at a high current of 2 C, which is approximately 300 times higher than that of bare FeF 3 . Benefitting from the N‐doped carbon matrix, the composite electrodes exhibited minor transfer resistance (117.4 Ω, only 44.0 % of that of bare FeF 3 ) and very low polarization voltage (ca. 0.19 V). Meanwhile, it provided a buffer for volume expansion during the insertion of Li + and maintained cycling stability. This work can supply a simple pathway for designing ultrahigh‐rate and long‐life FeF 3 cathode materials.
Type of Medium:
Online Resource
ISSN:
2196-0216
,
2196-0216
DOI:
10.1002/celc.201901060
Language:
English
Publisher:
Wiley
Publication Date:
2019
detail.hit.zdb_id:
2724978-5
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