Necklace-Like Structures Composed of Fe<sub>3</sub> N@C Yolk-Shell Particles as an Advanced Anode for Sodium-Ion Batteries.
basic_science · Level V
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- Record sourced from PubMed, PMID 29920788.
- Also identified by DOI 10.1002/adma.201800525.
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Abstract
It is of great importance to develop cost-effective electrode materials for large-scale use of Na-ion batteries. Here, a binder-free electrode based on necklace-like structures composed of Fe<sub>3</sub> N@C yolk-shell particles as an advanced anode for Na-ion batteries is reported. In this electrode, every Fe<sub>3</sub> N@C unit has a novel yolk-shell structure, which can accommodate the volumetric changes of Fe<sub>3</sub> N during the (de)sodiation processes for superior structural integrity. Moreover, all reaction units are threaded along the carbon fibers, guaranteeing excellent kinetics for the electrochemical reactions. As a result, when evaluated as an anode material for Na-ion batteries, the Fe<sub>3</sub> N@C nano-necklace electrode delivers a prolonged cycle life over 300 cycles, and achieves a high C-rate capacity of 248 mAh g<sup>-1</sup> at 2 A g<sup>-1</sup> .