通过溶剂热法制备的石墨烯负载二氧化锡纳米颗粒用于增强锂离子电池的电化学性能。

Graphene-supported SnO2 nanoparticles prepared by a solvothermal approach for an enhanced electrochemical performance in lithium-ion batteries.

作者信息

Wang Bei, Su Dawei, Park Jinsoo, Ahn Hyojun, Wang Guoxiu

机构信息

Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, City Campus, Broadway, Sydney, NSW, 2007, Australia.

出版信息

Nanoscale Res Lett. 2012 Apr 13;7(1):215. doi: 10.1186/1556-276X-7-215.

DOI:10.1186/1556-276X-7-215

PMID:22500947

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3442962/

Abstract

SnO2 nanoparticles were dispersed on graphene nanosheets through a solvothermal approach using ethylene glycol as the solvent. The uniform distribution of SnO2 nanoparticles on graphene nanosheets has been confirmed by scanning electron microscopy and transmission electron microscopy. The particle size of SnO2 was determined to be around 5 nm. The as-synthesized SnO2/graphene nanocomposite exhibited an enhanced electrochemical performance in lithium-ion batteries, compared with bare graphene nanosheets and bare SnO2 nanoparticles. The SnO2/graphene nanocomposite electrode delivered a reversible lithium storage capacity of 830 mAh g-1 and a stable cyclability up to 100 cycles. The excellent electrochemical properties of this graphene-supported nanocomposite could be attributed to the insertion of nanoparticles between graphene nanolayers and the optimized nanoparticles distribution on graphene nanosheets.

摘要

通过以乙二醇为溶剂的溶剂热法，将二氧化锡纳米颗粒分散在石墨烯纳米片上。通过扫描电子显微镜和透射电子显微镜已证实二氧化锡纳米颗粒在石墨烯纳米片上的均匀分布。确定二氧化锡的粒径约为5纳米。与裸石墨烯纳米片和裸二氧化锡纳米颗粒相比，合成的二氧化锡/石墨烯纳米复合材料在锂离子电池中表现出增强的电化学性能。二氧化锡/石墨烯纳米复合电极具有830 mAh g-1的可逆锂存储容量和高达100次循环的稳定循环性能。这种石墨烯负载的纳米复合材料优异的电化学性能可归因于纳米颗粒插入石墨烯纳米层之间以及纳米颗粒在石墨烯纳米片上的优化分布。