Tucked flower-like SnS2/Co3O4 composite for high-performance anode material in lithium-ion batteries

Tucked flower-like SnS2/Co3O4 composite for high-performance anode material in lithium-ion batteries
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高性能锂离子电池负极材料的花状SnS2/Co3O4复合材料

DOI:
10.1016/j.electacta.2015.12.127
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发表时间:
2016-02
期刊:
Electrochimica Acta
影响因子:
--
通讯作者:
R.H. Zeng
R.H. Zeng
中科院分区:
其他
文献类型:
--
作者:
X.X. Pan;S.L. Chou;L.Z. Zhao;R.H. Zeng

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通过简单的溶液法在SnS 2微花的花瓣间隙中生长Co 3 O 4,制备了一种新型的SnS 2/Co 3 O 4卷缩花状结构。在我们的策略中,由于Co 3 O 4生长产生的膨胀力,花朵的花瓣向内卷曲,导致Co 3 O 4与SnS 2花瓣形成涂层结构的封装。与纯SnS 2相比,SnS 2/Co 3 O 4复合材料的性能得到了显着提高。在100次循环后,SnS 2/Co 3 O 4在100 mA g− 1的电流密度下实现了1.715 mAh g− 1的出色可逆容量,容量衰减可忽略不计。此外,SnS 2/Co 3 O 4具有优异的倍率性能,即使在高达1000 mA g-1的电流密度下,也可获得高达530 mAh g-1的可逆容量。折叠花瓣状的形貌和Co 3 O 4二级结构的引入是复合材料储锂容量提高的原因。SnS 2/Co 3 O 4由于其合成方法简单、容量大而显示出作为锂离子电池负极材料的潜力。
A novel tucked flower-like SnS2/Co3O4structure is synthesized by growing Co3O4in the gaps between petals of SnS2microflowers through a facile solution method. In our strategy, the petals of the flowers are curled inwards due to the swelling force resulting from growth of Co3O4, resulting in the encapsulation of Co3O4with the SnS2petals forming a coating structure. The SnS2/Co3O4composite displays greatly improved performance in comparison with pure SnS2. After 100 cycles, an outstanding reversible capacity of ∼715 mAh g−1with negligible capacity fading is achieved at current density of 100 mA g−1for SnS2/Co3O4. What is more, the SnS2/Co3O4exhibits excellent rate capability, and a reversible capacity of up to ∼530 mAh g−1is obtained, even at a current density as high as 1000 mA g−1. The morphology of tucked flower-like petals and the introduction of the secondary structure of Co3O4are suggested to be responsible for the improved lithium storage capacity of the composite. The as-prepared SnS2/Co3O4shows promise as a potential anode material for Li-ion batteries due to its simple synthesis method and large capacity.
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
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