Synthesis of SnO2/MoS2 composites with different component ratios and their applications as lithium ion battery anodes
Synthesis of SnO2/MoS2 composites with different component ratios and their applications as lithium ion battery anodes
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DOI：
10.1039/c4ta03770g
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发表时间：
2014-11-14
影响因子：
11.9
通讯作者：
Xue, Junmin
中科院分区：
文献类型：
--
作者：
Chen, Yu;Lu, Jia;Xue, Junmin
由于SnO2和MoS2具有较高的容量和易于合成的特点，本文选择了两种极具潜力的阳极材料SnO2和MoS2组成复合阳极，其中SnO2纳米粒子作为间隔层防止MoS2纳米片的再堆积，而MoS2纳米片作为衬底容纳SnO2纳米粒子。然而，两组分之间的比例对最终的电化学性能有至关重要的影响。本文合成了四组不同SnO2/MoS2配比的复合材料（SnO2/MoS2-1、SnO2/MoS2-2、SnO2/MoS2-3和SnO2/MoS2-4），并对其进行了表征和电化学测试。其中，SnO2/MoS2-3复合材料的SnO2: MoS2质量比约为2:1，优于纯MoS2纳米片和任何其他复合材料，在230次循环的测试周期内，电流密度在100到10,000 mA g（-1）之间，提供了最高和最稳定的可逆容量。
Owing to their high capacities and ease of synthesis With desired morphologies, two anode materials with great potential, namely SnO2 and MoS2, are selected to form a composite anode, where SnO2 nanoparticles act as spacers to prevent the restacking of MoS2 nanosheets, while MoS2 nanosheets serve as substrates to accommodate the SnO2 nanoparticles. However, the ratio between the two components has a crucial effect on the resultant electrochemical performance. In this work, four sets of composites with different SnO2/MoS2 ratios (SnO2/MoS2-1, SnO2/MoS2-2, SnO2/MoS2-3, and SnO2/MoS2-4) have been synthesized, characterized, and electrochemically tested. Among them, the composite of SnO2/MoS2-3 with an SnO2 : MoS2 mass ratio of around 2 : 1 outperforms the pure MoS2 nanosheets and any other composite, delivering the highest and most stable reversible capacities over a test period of 230 cycles with a current density ranging from 100 to 10 000 mA g(-1).