Fabrication of high-surface-area, SiO2 supported polyimide carbon aerogel microspheres: electrochemical application

被引:0
作者
Liu, Shi [1 ]
Ji, Jianqi [1 ]
Wang, Yixing [1 ]
Yan, Cenqi [1 ]
Bai, Huitao [2 ]
Qin, Jiaqiang [1 ]
Cheng, Pei [1 ]
机构
[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat & Engn, Chengdu 610065, Peoples R China
[2] State Grid Smart Grid Res Inst Co Ltd, State Key Lab Adv Power Transmiss Technol, Beijing 102211, Peoples R China
来源
JOURNAL OF PHYSICS-MATERIALS | 2023年 / 6卷 / 01期
基金
中国国家自然科学基金;
关键词
carbon aerogel microspheres; polyimide; SiO2; reverse emulsion; supercapacitors; PERFORMANCE; GRAPHENE; NANOSHEETS; POLYMER; STORAGE; SPHERES; ANODE;
D O I
10.1088/2515-7639/acaa59
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A series of polyimide (PI)/SiO2 aerogel microspheres were prepared by using polyamide acid salt and hydrolyzed tetraethyl orthosilicate based on the reverse-phase emulsion method. Then, PI/SiO2 aerogel microspheres were carbonized and etched to obtain carbon aerogel microspheres (CAMs). Scanning electron microscope, transmission electron microscope and nitrogen isothermal adsorption were used to characterize the micro-morphology and pore structure of the microspheres; and electrochemical workstation was used to test the electrochemical performance of the CAMs. The results showed that CAMs with different pore structures and specific surface area were obtained by adjusting the content of SiO2. Highest specific surface area of 1166.9 m(2) g(-1) and a total pore volume of 1.2369 cm(3) g(-1) were achieved at a SiO2 content of 50%. When used as the electrode materials for supercapacitors, these CAMs demonstrated a maximum specific capacitance of 125.1 F g(-1) in a three-electrode system and a maximum capacitance of 53.3% at 30 A g(-1). This article provides a new strategy for the preparation of CAMs with high specific surface area by using linear PI precursor and SiO2 support skeleton.
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页数:9
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