A facile and cost effective synthesis of nitrogen and fluorine Co-doped porous carbon for high performance Sodium ion battery anode material
A facile and cost effective synthesis of nitrogen and fluorine Co-doped porous carbon for high performance Sodium ion battery anode material
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高性能钠离子电池负极材料氮氟共掺杂多孔炭的简易低成本合成
DOI：
10.1016/j.jpowsour.2019.227568
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发表时间：
2020-02-01
影响因子：
9.2
通讯作者：
Shen, Pei Kang
中科院分区：
文献类型：
--
作者：
He, Qiuchen;Jiang, Jianhong;Shen, Pei Kang
开发具有成本效益的高性能钠离子电池电极材料对于大规模储能至关重要。在此，我们合成了一种新型的氮和氟共掺杂的多孔碳使用一个简单的一锅热解的三个低成本的组件：聚四氟乙烯，含氮树脂，和氢氧化钾。共掺杂碳包括具有缺陷/无序（和类似于0.42 nm的宽层间距）的高度多孔片的3D组件，其具有2040.3 m2/g的大表面积和分级孔径。这些结构特征的有利组合促进高钠离子储存容量、快速转移动力学和稳定循环。结果，共掺杂的碳在300次循环后在0.1 A g（-1）下提供令人印象深刻的312.6 mAh g（-1），并且在5000次循环后在5 A g（-1）下提供215.3 mAh g（-1）（或每循环0.005%损失）。因此，碳的优异循环性能与其方便且低成本的合成相结合，为大规模储能提供了有前途的钠离子电池负极材料。
The development of cost effective, high performance, electrode materials for sodium ion batteries is of critical importance for large scale energy storage. Herein, we synthesize a novel nitrogen and fluorine co-doped porous carbon using a facile one-pot pyrolysis of three low cost components: polytetrafluoroethylene, a nitrogen-containing resin, and potassium hydroxide. The co-doped carbon comprises 3D assemblies of highly porous sheets with defects/disorders (and wide interlayer spacing of similar to 0.42 nm), which have a large surface area of 2040.3 m(2) g(-1) with hierarchical pore sizes. The advantageous combination of these structural features facilitates high sodium ion storage capacity, fast transfer kinetics and stable cycling. As a result, the co-doped carbon delivers an impressive 312.6 mAh g(-1) at 0.1 A g(-1) after 300 cycles and 215.3 mAh g(-1) at 5 A g(-1) after 5000 cycles (or 0.005% loss per cycle). Therefore, the excellent cycling performance of the carbon in combination with its convenient and low cost synthesis offers a promising sodium ion battery anode material for large scale energy storage.