Nitrogen-doped porous carbons derived from a natural polysaccharide for multiple energy storage devices†,Sustainable Energy & Fuels

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Nitrogen-doped porous carbons derived from a natural polysaccharide for multiple energy storage devices†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2017-11-09 00:00:00 , DOI: 10.1039/c7se00443e
Yongpeng Cui _{1,

2,

3,

4} , Huanlei Wang _{1,

2,

3,

4} , Xiaonan Xu _{1,

2,

3,

4} , Yan Lv _{1,

2,

3,

4} , Jing Shi _{1,

2,

3,

4} , Wei Liu _{1,

2,

3,

4} , Shougang Chen _{1,

2,

3,

4} , Xin Wang _{1,

2,

3,

4}

Affiliation

Designing advanced carbon electrodes is considered as one of the most promising directions for energy storage. Herein, we report a facile approach to produce porous carbon nanomaterials. The carbon nanomaterials were prepared via KOH activation using natural polysaccharide-sodium alginate as the precursor with the subsequent introduction of additional nitrogen heteroatoms achieved by further reaction with urea. The optimal electrodes with a high specific surface area (up to 3313 m² g⁻¹), interconnected porosity, and rich nitrogen (∼7.2 wt%) and oxygen (∼7.4 wt%) doping can achieve an excellent electrochemical performance in supercapacitors and lithium ion batteries. When these materials are employed as supercapacitor electrodes, they achieved an outstanding specific capacitance of 267 F g⁻¹ at 1 A g⁻¹ and an extremely high rate performance with 76.8% capacitance retention ratio in an alkaline electrolyte. In addition, a high capacitance of 197 F g⁻¹ at 0.5 A g⁻¹ with a high capacitance retention ratio of 52.9% at 100 A g⁻¹ can be achieved in an ionic liquid electrolyte. When tested as lithium ion battery anodes, an extraordinarily high specific capacity of 1455 mA h g⁻¹ and a stable energy storage performance up to 500 cycles were observed. The present study highlights that high-performance carbon electrodes can be produced by using sustainable precursor and can be used in multiple energy storage systems.

中文翻译：

来自天然多糖的氮掺杂多孔碳，可用于多种储能设备†

设计先进的碳电极被认为是储能最有希望的方向之一。在本文中，我们报道了一种生产多孔碳纳米材料的简便方法。通过使用天然多糖-海藻酸钠作为前体通过KOH活化来制备碳纳米材料，随后引入通过与尿素进一步反应而获得的另外的氮杂原子。具有高比表面积（最大3313 m ² g ^-1的最佳电极）），相互连接的孔隙率以及丰富的氮（〜7.2 wt％）和氧（〜7.4 wt％）掺杂可以在超级电容器和锂离子电池中实现出色的电化学性能。当将这些材料用作超级电容器电极时，它们在1 A g ^-1下获得了267 F g ^-1的出色比电容，并且在碱性电解质中具有极高的倍率性能和76.8％的电容保持率。此外，197 F G高电容^-1在0.5 A克^-1在100甲克的52.9％的高电容保持率^-1可以在离子液体电解质来实现。作为锂离子电池阳极进行测试时，具有1455 mA hg ^-1的极高比容量并观察到高达500次循环的稳定储能性能。本研究强调，高性能碳电极可通过使用可持续的前体来生产，并可用于多种储能系统。

更新日期：2017-11-09

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