1. Prussian Blue Analogue-Derived Fe-Doped CoS 2 Nanoparticles Confined in Bayberry-like N-Doped Carbon Spheres as Anodes for Sodium-Ion Batteries.
- Author
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Hu, Jiajia, Liu, Cheng, Cai, Chen, Sun, Qianqian, Lu, Mixue, Yao, Zhujun, and Yang, Yefeng
- Subjects
PRUSSIAN blue ,DOPING agents (Chemistry) ,SODIUM ions ,NANOPARTICLES ,METAL sulfides ,ANODES - Abstract
Obvious volume change and the dissolution of polysulfide as well as sluggish kinetics are serious issues for the development of high performance metal sulfide anodes for sodium-ion batteries (SIBs), which usually result in fast capacity fading during continuous sodiation and desodiation processes. In this work, by utilizing a Prussian blue analogue as functional precursors, small Fe-doped CoS
2 nanoparticles spatially confined in N-doped carbon spheres with rich porosity were synthesized through facile successive precipitation, carbonization, and sulfurization processes, leading to the formation of bayberry-like Fe-doped CoS2 /N-doped carbon spheres (Fe-CoS2 /NC). By introducing a suitable amount of FeCl3 in the starting materials, the optimal Fe-CoS2 /NC hybrid spheres with the designed composition and pore structure exhibited superior cycling stability (621 mA h g−1 after 400 cycles at 1 A g−1 ) and improved the rate capability (493 mA h g−1 at 5 A g−1 ). This work provides a new avenue for the rational design and synthesis of high performance metal sulfide-based anode materials toward SIBs. [ABSTRACT FROM AUTHOR]- Published
- 2023
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