articleAdvanced Energy MaterialsMar 19, 2024Closed access

Enhanced Fast‐Charging and Longevity in Sodium‐Ion Batteries through Nitrogen‐Doped Carbon Frameworks Encasing Flower‐Like Bismuth Microspheres

ZCZhilin ChenXWXiaoyu WuZSZhefei SunJPJianhai PanJHJiajia Han

Xiamen University · University of California San Diego · +3 more institutions

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Abstract

Abstract Micro‐sized bismuth (Bi) is recognized for its high volumetric capacity and suitable working potential, making it a promising anode candidate for sodium‐ion batteries (SIBs). However, its substantial volume changes and slow reaction kinetics during cycling detrimentally affects the SIB performance. Theoretical prediction uncovers a previously unexplored favorable attribute that bonding between nitrogen within a carbon coating and Bi atoms facilitates Na + ingress into the Bi bulk, significantly enhancing Bi‐Na alloying reactions, mitigating volume expansion, and preventing Na‐dendrite formation. Experimentally, the study innovatively engineers a flower‐like micro‐sized Bi encapsulated within an…

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Topics & keywords

Topics
Keywords
  • Anode
  • Materials science
  • Bismuth
  • Carbon fibers
  • Chemical engineering
  • Nitrogen
  • Cathode
  • Nanotechnology
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