Self-Templated Formation of Interlaced Carbon Nanotubes Threaded Hollow Co3S4 Nanoboxes for High-Rate and Heat-Resistant Lithium-Sulfur Batteries,Journal of the American Chemical Society

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Self-Templated Formation of Interlaced Carbon Nanotubes Threaded Hollow Co3S4 Nanoboxes for High-Rate and Heat-Resistant Lithium-Sulfur Batteries
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2017-09-01 , DOI: 10.1021/jacs.7b06973
Tao Chen ₁ , Zewen Zhang ₁ , Baorui Cheng ₁ , Renpeng Chen ₁ , Yi Hu ₁ , Lianbo Ma ₁ , Guoyin Zhu ₁ , Jie Liu _{1,

2} , Zhong Jin ₁

Affiliation

Lithium-sulfur batteries (Li-S) have attracted soaring attention due to the particularly high energy density for advanced energy storage system. However, the practical application of Li-S batteries still faces multiple challenges, including the shuttle effect of intermediate polysulfides, the low conductivity of sulfur and the large volume variation of sulfur cathode. To overcome these issues, here we reported a self-templated approach to prepare interconnected carbon nanotubes inserted/wired hollow Co3S4 nanoboxes (CNTs/Co3S4-NBs) as an efficient sulfur host material. Originating from the combination of three-dimensional CNT conductive network and polar Co3S4-NBs, the obtained hybrid nanocomposite of CNTs/Co3S4-NBs can offer ultrahigh charge transfer properties, and efficiently restrain polysulfides in hollow Co3S4-NBs via the synergistic effect of structural confinement and chemical bonding. Benefiting from the above advantages, the S@CNTs/Co3S4-NBs cathode shows a significantly improved electrochemical performance in terms of high reversible capacity, good rate performance, and long-term cyclability. More remarkably, even at an elevated temperature (50 °C), it still exhibits high capacity retention and good rate capacity.

中文翻译：

自模板形成交错碳纳米管螺纹空心 Co3S4 纳米盒，用于高倍率和耐热锂硫电池

锂硫电池（Li-S）由于先进的储能系统具有特别高的能量密度而备受关注。然而，锂硫电池的实际应用仍面临多重挑战，包括中间多硫化物的穿梭效应、硫的低电导率和硫正极的体积变化大。为了克服这些问题，我们在这里报道了一种自模板方法来制备相互连接的碳纳米管插入/连线中空 Co3S4 纳米盒（CNTs/Co3S4-NBs）作为一种有效的硫主体材料。源自三维碳纳米管导电网络和极性 Co3S4-NBs 的结合，获得的 CNTs/Co3S4-NBs 混合纳米复合材料可以提供超高的电荷转移性能，并通过结构限制和化学键合的协同作用有效抑制空心 Co3S4-NBs 中的多硫化物。受益于上述优点，S@CNTs/Co3S4-NBs正极在高可逆容量、良好的倍率性能和长期循环性能方面表现出显着改善的电化学性能。更值得注意的是，即使在升高的温度（50°C）下，它仍然表现出高容量保持率和良好的倍率容量。

更新日期：2017-09-01

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