One-step synthesis of SnO2@rGO-carbon particle framework nanoarchitectures as anode materials for tunable lithium storage properties
One-step synthesis of SnO2@rGO-carbon particle framework nanoarchitectures as anode materials for tunable lithium storage properties
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DOI：
10.1016/j.jallcom.2014.11.209
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发表时间：
2015-04
影响因子：
6.2
通讯作者：
Yakun Bu;Yiyin Huang;Tengfei Li;Pengwu Wu;Yaobing Wang;J. Yao
中科院分区：
文献类型：
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作者：
Yakun Bu;Yiyin Huang;Tengfei Li;Pengwu Wu;Yaobing Wang;J. Yao
采用易溶共沉淀法成功制备了一系列新型的SnO2@rGO -碳纳米结构，其中碳纳米颗粒为BP2000和KJ600。TGA、XRD、SEM、TEM和拉曼光谱分析表明，sno2纳米粒子和碳中间体在分子水平上均匀分散在石墨烯纳米片上，形成了SnO2@rGO -碳颗粒的骨架纳米结构。SnO2@rGO -BP2000在初始电流密度为100 mAg−1的情况下，放电容量为1284.4 mAg−1，经过60次循环后，可逆容量保持率为76%。SnO2@rGO -BP2000在高速率和低速率下均表现出最佳的速率性能。SnO2@rGO -BP2000的优异性能归功于形貌清晰、粒径合适、分布均匀以及基于石墨烯-碳颗粒框架的sno2体积膨胀空间充足。
A series of novel nanoarchitectures of SnO2@rGO–carbon inserted with carbon nanoparticles of BP2000 and KJ600 was successfully prepared by a facile coprecipitation method. TGA, XRD, SEM, TEM and Raman spectrom analysis are carried out and indicate that SnO2nanoparticles and carbon intermediates are uniformly dispersed on graphene nanosheets at a molecular level, forming the framework nanoarchitectures of SnO2@rGO–carbon particles. SnO2@rGO–BP2000 delivers a discharge capacity of 1284.4 mAhg−1and 76% retention of the reversible capacities after 60 cycles at an initial current density of 100 mAg−1. SnO2@rGO–BP2000 also showed the best rate performance among three anode materials at both high and low rate. The outstanding performance of the SnO2@rGO–BP2000 is attributed to well-defined morphology with suitable particle size, uniform distribution as well as enough room for the SnO2volume expansion based on the graphene–carbon particles framework.