In:
Nature Communications, Springer Science and Business Media LLC, Vol. 12, No. 1 ( 2021-05-20)
Abstract:
The gradient-structure is ideal nanostructure for conversion-type anodes with drastic volume change. Here, we demonstrate an inorganic-organic competitive coating strategy for constructing gradient-structured ferroferric oxide-carbon nanospheres, in which the deposition of ferroferric oxide nanoparticles and polymerization of carbonaceous species are competitive and well controlled by the reaction thermodynamics. The synthesized gradient-structure with a uniform size of ~420 nm consists of the ferroferric oxide nanoparticles (4–8 nm) in carbon matrix, which are aggregated into the inner layer (~15 nm) with high-to-low component distribution from inside to out, and an amorphous carbon layer (~20 nm). As an anode material, the volume change of the gradient-structured ferroferric oxide-carbon nanospheres can be limited to ~22% with ~7% radial expansion, thus resulting in stable reversible specific capacities of ~750 mAh g −1 after ultra-long cycling of 10,000 cycles under ultra-fast rate of 10 A g −1 . This unique inorganic-organic competitive coating strategy bring inspiration for nanostructure design of functional materials in energy storage.
Type of Medium:
Online Resource
ISSN:
2041-1723
DOI:
10.1038/s41467-021-23150-8
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2021
detail.hit.zdb_id:
2553671-0