Inorganic-organic competitive coating strategy derived uniform hollow gradient-structured ferroferric oxide-carbon nanospheres for ultra-fast and long-term lithium-ion battery

Yuan Xia, Tiancong Zhao, Xiaohang Zhu, Yujuan Zhao, Haili He, Chin-te Hung, Xingmiao Zhang, Yan Chen, Xinlei Tang, Jinxiu Wang, Wei Li () and Dongyuan Zhao ()
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Yuan Xia: Fudan University
Tiancong Zhao: Fudan University
Xiaohang Zhu: Fudan University
Yujuan Zhao: Fudan University
Haili He: Fudan University
Chin-te Hung: Fudan University
Xingmiao Zhang: Fudan University
Yan Chen: Fudan University
Xinlei Tang: Fudan University
Jinxiu Wang: Fudan University
Wei Li: Fudan University
Dongyuan Zhao: Fudan University

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: 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.

Date: 2021
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DOI: 10.1038/s41467-021-23150-8

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