1. Electrospun CuCoN0.6 coating necklace-like N-doped carbon nanofibers for high performance lithium-sulfur batteries.
- Author
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Liu, Dan, Wang, Zicheng, Guo, Zichen, Tian, Yuan, and Wang, Cheng
- Subjects
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CARBON nanofibers , *LITHIUM sulfur batteries , *DOPING agents (Chemistry) , *ELECTRON diffusion , *NITRIDATION , *CATALYTIC activity - Abstract
A necklace-like structure of CuCoN 0.6 nanoparticles anchored on N -doped carbon nanofibers (CuCoN 0.6 /NC) has been prepared by electrospinning and subsequent nitridation processes as freestanding sulfur host for Li-S batteries, which boosts chemical adsorption and catalytic activity throughout detailed theoretical calculation and experimental electrochemical characterization. [Display omitted] Freestanding electrodes with high energy density and cycle stability have attracted attention on the development of lithium-sulfur (Li-S) batteries. However, both severe shuttle effect and sluggish conversion kinetics hinder their practical applications. Herein, we employed the electrospinning and subsequent nitridation processes to prepare a necklace-like structure of CuCoN 0.6 nanoparticles anchored on N -doped carbon nanofibers (CuCoN 0.6 /NC) as freestanding sulfur host for Li-S batteries. Such bimetallic nitride boosts chemical adsorption and catalytic activity throughout detailed theoretical calculation and experimental electrochemical characterization. The three-dimensional conductive necklace-like framework could provide abundant cavities for realizing high sulfur utilization and alleviating the volume variation, as well as fast lithium-ions diffusion and electron transfer. The Li-S cell with the S@CuCoN 0.6 /NC cathode delivers a stable cycling performance with a capacity attenuation rate of 0.076% per cycle after 150cycles at 2.0C and an exceptional capacity retention of 657 mAh g−1 even at a high sulfur loading of 6.8 mg cm−2 over 100cycles. The facile and scalable method can help promote the widespread application of fabrics. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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