Self-templating synthesis of porous carbon with phytate salts for supercapacitor application
Self-templating synthesis of porous carbon with phytate salts for supercapacitor application
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用于超级电容器应用的植酸盐自模板合成多孔碳
DOI：
10.1016/j.est.2022.106221
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发表时间：
2023-01
影响因子：
9.4
通讯作者：
Shuping Zhuo
中科院分区：
文献类型：
--
作者：
Xin Wang;Xinyi Wang;Xiaofeng Zhou;Xinping Yang;Xiaozhong Wu;Pengfei Zhou;Jin Zhou;Shuping Zhuo
以植酸和醋酸锌为原料合成了植酸锌模板，制备了超级电容器用多孔碳材料。得到的碳材料具有层次化的多孔结构，孔径分布在1和10 nm，氮吸附分析表明其比表面积为1125m2g−1。此外，在植酸盐的制备过程中引入KOH可以有效地调节材料的孔结构，使微孔含量显著增加。碳前驱体的X-射线衍射图中没有KOH信号，且K、Zn在碳前驱体中分布均匀，这表明通过原位K活化而不是KOH活化制备的多孔炭形成了双金属植酸盐并促进了微孔的形成。随着微孔率的增加，比电容从195F−1在KOH电解液中提高到294，比容量从187F−1在硫酸电解液中提高到2 47。我们的发现为通过简单的自模板方法制备孔隙率可调的多孔炭提供了指导。
Zinc phytate was synthesized as a self-sacrificing template to prepare porous carbon for supercapacitor with the starting materials of phytate acid and zinc acetate. The obtained carbon material possesses a hierarchically porous structure with pore size distributed at 1 and 10 nm, contributing to a specific surface area of 1125 m2g−1according to the nitrogen sorption analysis. Moreover, the porous structure can be effectively adjusted by introducing KOH during the preparation procedure of phytate salt, resulting in a significant increase of micropore content. The absence of KOH signal in the X-ray diffraction pattern of carbon precursor and uniform K, Zn distribution in carbon precursor indicate the formation dual-metal phytates and contributing to the micropore for the prepared porous carbon by in-situ K activation instead of KOH activation. With developed microporosity, the specific capacitance can be promoted up to 294 from 195 F g−1in KOH electrolyte and 247 from 187 F g−1in H2SO4electrolyte. Our findings provide a guide to prepare porous carbon with tunable porosity through a facile self-templating method.
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