Facile synthesis of hierarchical porous carbon for supercapacitor with enhanced electrochemical performance

Facile synthesis of hierarchical porous carbon for supercapacitor with enhanced electrochemical performance
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轻松合成具有增强电化学性能的超级电容器分级多孔碳

DOI:
10.1016/j.matlet.2016.06.046
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发表时间:
2016-11
期刊:
影响因子:
3
通讯作者:
Wang, Chengbing
Wang, Chengbing
中科院分区:
材料科学3区
文献类型:
--
作者:
Wang, Rutao;Zhang, Peng;Lang, Junwei;Wang, Chengbing

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本文采用一锅法从海藻酸钠(SA)中合成了分级多孔炭。在200 °C下预处理后,SA在800 °C下通过少量NaOH活化。在烧结过程中,SA能起到自活化作用,有效地减少了活化过程中碱性活化剂的用量(重量比为5:4)。最后,最终产物在2 M KOH水溶液中表现出451 F/g的容量,并表现出优异的倍率性能。在10 A/g下测试了OSADC-5的循环能力,并且在10,000次循环后,电容保持率为99%,显示出优异的电化学稳定性。
Herein, we use a facile one-pot strategy to synthesis hierarchical porous carbon from sodium alginate (SA). After pre-conditioned at 200 °C, SA was activated by a small amount of NaOH at 800 °C. In the sintering process, the SA can achieve a self-activation effect which can effectively reduce the dosage of alkaline activator (in a weight ratio of 5:4) during activating process. Finally, the end product exhibits a capacity of 451 F/g in 2 M KOH aqueous solution and exhibit excellent rate ability. The cycle ability of OSADC-5 was tested at 10 A/g, and after 10,000 cycles the capacitance retention is 99% which shows superb electrochemistry stability.
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