Microwave solvothermal synthesis of flower-like SnS2 and SnO2 nanostructures as high-rate anodes for lithium ion batteries

Microwave solvothermal synthesis of flower-like SnS2 and SnO2 nanostructures as high-rate anodes for lithium ion batteries
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微波溶剂热合成花状 SnS2 和 SnO2 纳米结构作为锂离子电池高倍率负极

DOI:
10.1016/j.cej.2013.05.119
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发表时间:
2013-08
影响因子:
15.1
通讯作者:
Wang, Yong
Wang, Yong
中科院分区:
工程技术1区
文献类型:
--
作者:
Zou, Yuqin;Wang, Yong

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本文报道了一种微波辅助溶剂热快速制备花状sns2和sno2纳米结构的方法。研究发现,微波辐照温度、反应时间和前驱体浓度等合成条件对产物的形貌和尺寸有重要影响。当用作可充电锂离子电池的负极材料时,花状sno2产品的电化学性能优于制备的花状sns2材料。sno2纳米花在100 mA g−1时具有良好的可循环性,可逆容量为717 mA h g−1。此外,sno2纳米花具有优异的高速率性能。在1000 mA g - 1和2000 mA g - 1下分别实现了667和532 mA h g - 1的高稳定容量。
This paper reports a fast microwave-assisted solvothermal approach to fabricate flower-like SnS2and SnO2nanostructures. The synthetic conditions such as microwave-irradiation temperature, reaction time and precursor concentration are found to have critical influences on the product morphologies and sizes. When used as anode materials for rechargeable Li-ion batteries, flower-like SnO2products exhibit better electrochemical properties than as-prepared flower-like SnS2materials. A large reversible capacity of 717 mA h g−1is observed for SnO2nanoflowers with a good cycliability at 100 mA g−1. Moreover, SnO2nanoflowers exhibit superior high-rate performances. Highly stable capacities of 667 and 532 mA h g−1are achieved at 1000 mA g−1and 2000 mA g−1respectively.
Sn@CNT 和 Sn@C@CNT 纳米结构可实现卓越的可逆锂离子存储
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