Nitrogen-rich sandwich-like carbon nanosheets as anodes with superior lithium storage properties†,Inorganic Chemistry Frontiers

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Nitrogen-rich sandwich-like carbon nanosheets as anodes with superior lithium storage properties†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-11-13 00:00:00 , DOI: 10.1039/c7qi00567a
Hailiang Chu _{1,

2,

3,

4,

5} , Chunfeng Shao _{1,

2,

3,

4,

5} , Shujun Qiu _{1,

2,

3,

4,

5} , Yongjin Zou _{1,

2,

3,

4,

5} , Cuili Xiang _{1,

2,

3,

4,

5} , Fen Xu _{1,

2,

3,

4,

5} , Lixian Sun _{1,

2,

3,

4,

5}

Affiliation

Carbon materials such as graphite have been used as anode material for Li-ion batteries (LIBs). However, the energy stored in carbon materials is greatly dependent on their structural characteristics. Herein, nitrogen-rich sandwich-like carbon nanosheets (NSCN) have been prepared through a facile hydrothermal carbonization (HTC) method followed by pyrolysis. The nitrogen-rich sandwich-like carbon nanosheets synthesized at 600 °C (NSCN-600) have a higher specific surface area of 1112 m² g⁻¹ and a total nitrogen content of 11.4 wt% (therein 9.30 wt% for both pyridinic-N and pyrrolic-N), giving rise to high discharge capacity (910 mA h g⁻¹ at 100 mA g⁻¹ after 50 cycles) and remarkable rate capability (719 mA h g⁻¹ at 500 mA g⁻¹ after 200 cycles and 390 mA h g⁻¹ at 2000 mA g⁻¹). Such desirable electrochemical properties could be attributed to the unique sandwich-like nanostructures consisting of a number of amorphous carbon nanoparticles closely covered with carbon sheet layers. Such a simple preparation method could provide a strategy for rational engineering of nanostructured nitrogen-rich carbonaceous materials for high-performance LIBs.

中文翻译：

富氮三明治状碳纳米片作为阳极，具有出色的锂存储性能†

碳材料（例如石墨）已被用作锂离子电池（LIB）的阳极材料。但是，存储在碳材料中的能量在很大程度上取决于其结构特征。在此，已经通过容易的水热碳化（HTC）方法然后热解制备了富氮夹心状碳纳米片（NSCN）。在600°C（NSCN-600）下合成的富氮夹心状碳纳米片（NSCN-600）的比表面积更高，为1112 m ² g ^-1，总氮含量为11.4 wt％（对于吡啶二酮和吡啶鎓，两者均为9.30 wt％）。 N和吡咯-N），产生高放电容量（50个循环后在100 mA g ^-1时为910 mA hg ^-1）和显着的倍率容量（719 mA hg ^-1在200个循环后以500 mA g ^-1的电流和在2000 mA g ^-1的390 mA hg ^-1的电流）。这种理想的电化学性质可归因于独特的三明治状纳米结构，其由许多紧密覆盖有碳片层的无定形碳纳米颗粒组成。这种简单的制备方法可为合理设计高性能LIB的纳米结构富氮碳质材料提供策略。

更新日期：2017-11-13

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