SnO 2 /Sn with core-shell structure Schottky heterojunctions loaded in graphene to promote electrochemical reaction kinetics and enable efficient lithium-ion storage

The stannic oxide (SnO ) anode expands in volume during cycling causing a decrease in reversible capacity. In this work, we generated a spherical SnO /Sn heterojunction with core-shell structure composites encapsulated by graphene (SnO /Sn/G) using a simple one-step hydrothermal and subsequent annea...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2024-07, Vol.26 (28), p.19497-19504
Main Authors: Yin, Shujuan, Zhang, Xueqian, Liu, Dongdong, Zhou, Lijuan, Wen, Guangwu, Wang, Yishan, Huang, Xiaoxiao
Format: Article
Language:English
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Summary:The stannic oxide (SnO ) anode expands in volume during cycling causing a decrease in reversible capacity. In this work, we generated a spherical SnO /Sn heterojunction with core-shell structure composites encapsulated by graphene (SnO /Sn/G) using a simple one-step hydrothermal and subsequent annealing process. SnO /Sn heterojunction nanospheres dispersed in a porous graphene framework accelerate the diffusion kinetics of electrons and ions. In addition, the structure plays a key role in mitigating large volume changes and nanostructure agglomeration. As a result, SnO /Sn/G exhibits excellent performance as an anode material for lithium-ion batteries (LIBs), maintaining a reversible specific capacity of 720.6 mA h g even after 600 cycles at a current density of 0.5 A g .
ISSN:1463-9076
1463-9084
DOI:10.1039/D4CP02118E