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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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