首页|In situ perfusing Sb particles into porous N-doped carbon microspheres and their electrochemical properties in potassium ion batteries
In situ perfusing Sb particles into porous N-doped carbon microspheres and their electrochemical properties in potassium ion batteries
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? 2022 Elsevier B.V.Antimony-based materials with low platform and high theoretical capacity have been considered as a promising candidate of anode material for economical and high-performance potassium ion batteries (PIBs) in the recent decades. Unfortunately, they are still affected by the sluggish kinetics and poor cycle stability, meanwhile, the large radius of the K+ ion leads to the aggregation of particles. Herein, we developed an in-situ perfusing method to construct Sb nanoparticles into the hierarchical porous N-doped carbon (HPNC) microspheres restriction structure, which was proved to be a reasonable and efficient way to enhance the electrochemical properties. Meanwhile, it was acknowledged that electrolyte optimization (KPF6 and KFSI) exerted significant influence on greatly enhancing the electrochemical performance. With the hierarchical porous structure and the electrolyte composition design, Sb@HPNC exhibits an outstanding reversible capacity of up to 507 mA h g?1 at a current density of 0.1 A g?1 over 100 cycles and excellent long-cycle stability of 262 mA h g?1 at 1.0 A g?1 over 700 cycles. We expect this work could offer a reference for the development and exploration of advanced alloy-type electrodes for PIBs.
AntimonyElectrolyte optimizationHierarchical structurePotassium ion battery
Wang X.、Qian K.、Chen X.、Guo C.、Li J.、Sun X.
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School of Chemistry and Materials Science Nanjing University of Information Science and Technology
NSTL
