Nitrogen-Doped Carbon Nanotubes Derived from Metal-Organic Frameworks for Potassium-Ion Battery Anodes
Nitrogen-Doped Carbon Nanotubes Derived from Metal-Organic Frameworks for Potassium-Ion Battery Anodes
复制标题
用于钾离子电池阳极的金属有机框架衍生的氮掺杂碳纳米管
DOI：
10.1002/cssc.201701759
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发表时间：
2018-01-10
期刊：
影响因子：
8.4
通讯作者：
Xu, Yunhua
中科院分区：
文献类型：
--
作者：
Xiong, Peixun;Zhao, Xinxin;Xu, Yunhua
针对钾离子电池(KIBS)用石墨负极倍率性能差的问题，采用一种简单、可扩展的方法热解含钴金属有机骨架，合成了边缘开层排列结构的掺氮碳纳米管(NCNTs)。独特的结构使K离子的嵌入变得容易和快速。作为KIBS的负极，NCNTs在2000mAg(-1)的大电流密度下的高容量保持率为102mAhg(-1)，并且具有良好的稳定性，在2000mAg(-1)下的500次循环中没有明显的容量损失。我们的发现有助于开发高性能的钾离子电池负极材料，作为大规模、低成本的储能系统。
To tackle the issue of the poor rate capability of graphite anodes for potassium-ion batteries (KIBs), nitrogen-doped carbon nanotubes (NCNTs) with an edge-open layer-alignment structure were synthesized using a simple and scalable approach of pyrolyzing cobalt-containing metal-organic frameworks. The unique structure enables a facile and fast intercalation of K ions. As anodes of KIBs, the NCNTs demonstrated an improved rate capability by a high capacity retention of 102mAhg(-1) at a high current density of 2000mAg(-1) and a good stability without evident capacity loss over 500cycles at 2000mAg(-1). Our findings can help to develop highperformance anode materials for potassium-ion batteries as large-scale and low-cost energy-storage systems.