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Rational design of porous Sn nanospheres/N-doped carbon nanofibers as an ultra-stable potassium-ion battery anode material.
- Source :
- Journal of Materials Chemistry A; 3/7/2021, Vol. 9 Issue 9, p5740-5750, 11p
- Publication Year :
- 2021
-
Abstract
- Potassium-ion batteries (PIBs) are considered as a promising candidate for large-scale energy storage applications due to the abundant potassium resources. In this work, a hybrid of porous Sn nanospheres incorporated in N-doped carbon nanofiber frameworks (Sn/N-CNFs) was fabricated via electrospinning and a subsequent carbonization process. As a PIB anode, Sn/N-CNFs exhibit superior cycling stability (198.0 mA h g<superscript>−1</superscript> at 1 A g<superscript>−1</superscript> after 3000 cycles, and the corresponding capacity retention rate is as high as 88.4%), outperforming other Sn-based materials. Such an excellent performance is ascribed to the synergistic effects of porous Sn nanospheres composed of ultra-small nanoparticles as well as to the unique and interconnected network of N-CNFs, which provide sufficient space for the volume expansion/contraction of Sn, supply efficient electrolyte diffusion paths, offer short K<superscript>+</superscript> diffusion distance, suppress the agglomeration of Sn nanoparticles, enhance the electronic conductivity, and thus facilitate the electron/ion transport. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 9
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 149147100
- Full Text :
- https://doi.org/10.1039/d0ta11501k