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- Title
Inorganic-organic competitive coating strategy derived uniform hollow gradient-structured ferroferric oxide-carbon nanospheres for ultra-fast and long-term lithium-ion battery.
- Authors
Xia, Yuan; Zhao, Tiancong; Zhu, Xiaohang; Zhao, Yujuan; He, Haili; Hung, Chin-te; Zhang, Xingmiao; Chen, Yan; Tang, Xinlei; Wang, Jinxiu; Li, Wei; Zhao, Dongyuan
- 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. The gradient-structure is ideal nanostructure for conversion-type anodes with drastic volume change. Here, the authors demonstrate an inorganic-organic competitive coating strategy to construct gradient-structured Fe3O4@C nanospheres.
- Subjects
LITHIUM-ion batteries; AMORPHOUS carbon; SURFACE coatings; CARBONACEOUS aerosols; ENERGY storage; THERMODYNAMICS; ANODES
- Publication
Nature Communications, 2021, Vol 12, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-021-23150-8