Monodisperse Yolk-Shell SnO2/C Submicron Spheres Fabricated Through a Facile Process As an Anode Material for Lithium-Ion Batteries
Advanced powder technology(2023)
摘要
Tin dioxide (SnO2) as an anode for lithium-ion batteries undergoes significant volume changes during cycling, limiting its commercial application. Herein, we propose a facile method to successfully synthe-size yolk-shell-structured carbon spheres decorated with SnO2 (YS SnO2/C) by oxygen etching. SnO2 nanocrystals are distributed in both the core and the shell, and account for 79 % of the total weight of the composite. The gap between core and shell can tolerate the volume expansion during lithiation. The N-doped carbon matrix plays an important role in maintaining the structural integrity and improving the electrical conductivity. Benefiting from these advantages, the YS SnO2/C can provide a high reversible capacity of 771 mAh g(-1) after 500 cycles at a current density of 2000 mA g(-1). (c) 2023 The Society of Powder Technology Japan. Published by Elsevier BV and The Society of Powder Technology Japan. All rights reserved.
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关键词
Yolk-shell structure,Oxygen etching,Electrode kinetics,Tin-based,Lithium-ion batteries
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