Large-Scale Synthesis of N,S Codoped Carbon-Modified Fe<sub>0.975</sub>S Composites as a Novel Anode for Lithium/Sodium Ion Batteries with Enhanced Performance.
basic_science · Level V
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- Record sourced from PubMed, PMID 39225724.
- Also identified by DOI 10.1021/acs.nanolett.4c01912.
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Abstract
To overcome obstacles hindering the commercialization of lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs), we introduce a cost-effective single-step sulfurization strategy for synthesizing iron sulfide (Fe<sub>0.975</sub>S) nanohybrids, augmented by N,S codoped carbon. The resulting N,S codoped carbon-coated Fe<sub>0.975</sub>S (Fe<sub>0.975</sub>S@NSC) electrode exhibits exceptional potential as a highly reversible anode material for both LIBs and SIBs. With impressive initial discharge and charge capacities (1658.2 and 1254.9 mAh g<sup>-1</sup> for LIBs and 1450.9 and 1077.1 mAh g<sup>-1</sup> for SIBs), the electrode maintains substantial capacity retention (900 mA h g<sup>-1</sup> after 1000 cycles for LIBs and 492.5 mA h g<sup>-1</sup> after 600 cycles for SIBs at 1.0 A g<sup>-1</sup>). The LiMn<sub>2</sub>O<sub>4</sub>//Fe<sub>0.975</sub>S@NSC and Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>//Fe<sub>0.975</sub>S@NSC full batteries can maintain excellent reversible capacity and robust cycling stability. Ex situ and in situ X-ray diffraction, density functional theory (DFT) calculations, and kinetics analysis confirm the promising energy storage potential of the Fe<sub>0.975</sub>S@NSC composite.