Na-Ion Storage Behaviors of Quadrangular Herringbone-Carbon Nanotubes in Ether- and Ester-Based Electrolyte Systems
Na-Ion Storage Behaviors of Quadrangular Herringbone-Carbon Nanotubes in Ether- and Ester-Based Electrolyte Systems
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DOI：
10.1021/acssuschemeng.8b04564
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发表时间：
2018-11
影响因子：
8.4
通讯作者：
Beibei Yang;Sitong Liu;Xu Guo;Huaihe Song;Jisheng Zhou
中科院分区：
文献类型：
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作者：
Beibei Yang;Sitong Liu;Xu Guo;Huaihe Song;Jisheng Zhou
钠离子在石墨碳中的储存是一个动力学上不利的过程。设想减小石墨层的尺寸可以通过缩短扩散路径来有效地增强na离子的储存。然而，由于缺乏模型石墨碳，减小石墨层尺寸对na离子存储的影响尚未进行研究。在这项工作中，采用具有人字形石墨壁的四边形碳纳米管（q-CNTs）作为模型材料来展示上述思想。q-CNTs对电解质的依赖性降低。它们在醚基和酯基电解质中都具有高容量、优异的速率性能和超长循环稳定性。通常，q-CNTs-600在醚基和酯基电解质中表现出高可逆容量，在0.1 A g-1时分别为212和200 mA h g-1。即使在5a g-1下，在醚基电解质中仍然可以保持132 mA h g-1的可逆容量。优秀的钠离子…
Na-ion storage in graphitic carbons is a kinetically unfavorable process. It is envisioned that decreasing the size of graphitic layers can efficiently enhance Na-ion storage by shortening the diffusion pathway. However, because of the lack of model graphitic carbons, investigation on the effect of decreasing the graphitic layer size on Na-ion storage has not yet been carried out. In this work, quadrangular carbon nanotubes (q-CNTs) with herringbone-like graphitic walls are employed as model materials to exhibit the idea above. The q-CNTs show reduced dependence on the electrolytes. They deliver high capacity, excellent rate performance, and ultralong cyclic stability in both ether-based and ester-based electrolytes. Typically, the q-CNTs-600 exhibits high reversible capacities of 212 and 200 mA h g–1 at 0.1 A g–1 in ether-based and ester-based electrolytes, respectively. Even at 5 A g–1, the reversible capacity of 132 mA h g–1 can still be maintained in the ether-based electrolyte. The excellent Na-ion s...