Si-C-N-Al的表面限域合成及其电化学性能研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (8): 2895-2903.

Si-C-N-Al的表面限域合成及其电化学性能研究

李琦旺¹, 张卫珂^1,2, 王佳玮³, 高博文¹, 陈柳玲¹

1.太原理工大学材料科学与工程学院,太原 030024;
2.兴县经开区铝镁新材料研发有限公司,吕梁 033603;
3.天津大学化工学院,天津 300350

收稿日期:2023-03-08 修订日期:2023-06-01 发布日期:2023-08-18
通信作者: 张卫珂,博士,副教授。E-mail:zhangweike@tyut.edu.cn
作者简介:李琦旺(1998—),男,硕士研究生。主要从事锂离子电池及超级电容器电极材料的研究。E-mail:ksi98@foxmail.com
基金资助:
山西省基础研究项目(202103021224071)

Surface Confined Synthesis and Electrochemical Performance of Si-C-N-Al

LI Qiwang¹, ZHANG Weike^1,2, WANG Jiawei³, GAO Bowen¹, CHEN Liuling¹

1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2. Aluminum-Magnesium Based New Material R&D Co., Ltd. Subsidiary of Xing Xian County Economic and Technological Development Zone, Lyuliang 033603, China;
3. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

Received:2023-03-08 Revised:2023-06-01 Published:2023-08-18

摘要/Abstract

摘要： 高表面积介孔SiO₂纳米球(KCC-1)具有纤维状以及独特的孔道结构,这使其拥有较高的比表面积和更多的暴露活性位点,KCC-1能够在表面有效地分散和稳定活性组分,作为载体负载活性组分时表现出优异的性能。本研究以含有大量N原子的三聚氰胺为碳前驱体,通过两步热解法制备得到氮掺杂的多孔碳材料,同时利用KCC-1具有纤维状这一特殊结构,将活性组分分散并限域在其表面,探索KCC-1含量对多孔碳材料结构与电化学性能的影响。研究表明,随着KCC-1含量的增加,材料的比电容整体呈先升高后降低的趋势。当加入KCC-1的质量分数为6%时,材料的比电容最高,为35.88 F·g^-1(1 A·g^-1电流密度下),与未加入KCC-1的原材料相比提升了约588.7%,且经过换算后同等质量下活性组分的比电容最高能达到190.53 F·g^-1。因此,本研究证明了KCC-1的限域效应能够有效提高活性组分的电化学性能及利用率,为将其应用在超级电容器中提供了一定的参考。

关键词: KCC-1, 纤维状结构, 两步热解法, 多孔碳材料, 限域, 电化学性能

Abstract: The high surface area mesoporous SiO₂ nanospheres (KCC-1) with fibrous and unique pore structure possess high specific surface area and abundant exposed active sites. KCC-1 is capable of effectively dispersing and stabilizing active components on surface, making an excellent carrier for loading active components. Nitrogen-doped porous carbon material was prepared via two-step pyrolysis using melamine with a high N atom content as carbon precursor. At the same time, the special fibrous structure of KCC-1 was utilized to disperse and confine the active component on its surface, and the effect of KCC-1 content on structure and electrochemical performance of porous carbon material was explored. The results indicate that the overall specific capacitance of material increases first and then decreases with the increase of KCC-1 content. When the mass ratio of KCC-1 is 6%, the specific capacitance of material is the highest, reaching 35.88 F·g^-1 (at current density of 1 A·g^-1), which representes an enhancement of approximately 588.7% compared with the pristine material without KCC-1. After conversion, the specific capacitance of active components at an equal mass can reach a maximum of 190.53 F·g^-1. Therefore, this study demonstrates that the confinement effect of KCC-1 can effectively enhance electrochemical performance and utilization efficiency of active components, providing valuable references for its future application in supercapacitors.

Key words: KCC-1, fibrous structure, two-step pyrolysis, porous carbon material, confine, electrochemical performance

中图分类号:

TB34

李琦旺, 张卫珂, 王佳玮, 高博文, 陈柳玲. Si-C-N-Al的表面限域合成及其电化学性能研究[J]. 硅酸盐通报, 2023, 42(8): 2895-2903.

LI Qiwang, ZHANG Weike, WANG Jiawei, GAO Bowen, CHEN Liuling. Surface Confined Synthesis and Electrochemical Performance of Si-C-N-Al[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(8): 2895-2903.

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