Engineering Anisotropically Curved Nitrogen‐Doped Carbon Nanosheets with Recyclable Binary Flux for Sodium‐Ion Storage,ChemSusChem

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Engineering Anisotropically Curved Nitrogen‐Doped Carbon Nanosheets with Recyclable Binary Flux for Sodium‐Ion Storage
ChemSusChem ( IF 7.5 ) Pub Date : 2018-04-06 , DOI: 10.1002/cssc.201702436
Yuxiang Chen ₁ , Jie Li ₁ , Yanqing Lai ₁ , Ming Xu _{1,

2} , Junming Li ₁ , Peng Wang ₁ , Zhian Zhang _{1,

3}

Affiliation

As a low‐cost substitute of graphene and graphene derivatives, 2D carbon nanosheets are considered to be attractive materials for high‐performance electrochemical energy‐storage devices. Nevertheless, the lack of cost‐effective and green preparation methods still greatly impedes the application of 2D carbon nanosheets in sodium‐ion batteries. Herein, an environmental friendly and versatile strategy is proposed to engineer anisotropically curved nitrogen‐doped carbon nanosheets (CNCNs) derived from biosources with hydrosoluble and recyclable flux. After undergoing serious corrosion from the LiCl/KCl binary flux, the resulting CNCNs possess high structural stability. Notably, the CNCNs also possess a rational specific surface area, open porous structure, and abundant accessible edges, which can shorten the ion‐diffusion path, provide abundant accessible active sites, and result in less charge‐transfer impedance and excellent sodium‐ion diffusion coefficient (8.9×10⁻¹⁰ cm² s⁻¹). As a consequence, CNCN electrodes can deliver a high specific capacity of 361.6 mAh g⁻¹ at 50 mA g⁻¹. Such architecture provides a promising structural platform for the fabrication of 2D carbons for highly reversible and high capacity sodium‐ion batteries.

中文翻译：

具有可回收二元通量的工程各向异性弯曲的氮掺杂碳纳米片，用于钠离子存储

作为石墨烯和石墨烯衍生物的低成本替代品，二维碳纳米片被认为是高性能电化学储能器件的诱人材料。然而，缺乏经济有效的绿色制备方法仍然极大地阻碍了二维碳纳米片在钠离子电池中的应用。本文提出了一种环境友好，用途广泛的策略，以工程化各向异性弯曲的氮掺杂碳纳米片（CNCNs），该碳纳米片源自具有水溶性和可循环利用通量的生物来源。经过LiCl / KCl二元焊剂的严重腐蚀后，所得的CNCN具有很高的结构稳定性。值得注意的是，CNCN还具有合理的比表面积，开放的多孔结构和丰富的可利用边缘，可缩短离子扩散路径，^-10 cm ² s ^-1）。结果，CNCN电极在50 mA g ^-1时可提供361.6 mAh g ^-1的高比容量。这种体系结构为用于高度可逆和高容量钠离子电池的二维碳的制造提供了有希望的结构平台。

更新日期：2018-04-06

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