Wrinkled Hollow Carbon Spheres with Adjustable Diameter for High‐Performance Supercapacitors

Abstract

AbstractCreating more pleated and collapsed structures for carbon‐based electrode materials is an important measure to enhance the performance of supercapacitors. Herein, a polymer formed by the aldimine reaction of terephthalaldehyde and aminopropyltriethoxysilane was utilized as the carbon source, and tetraethoxysilane was added as a silica additive to achieve the wrinkled structure on hollow carbon spheres. The silica had a significant modulating effect on the structure of the obtained wrinkled hollow carbon sphere (WHCS), which displayed a visible pleated structure, hollow structure, high specific surface area, and pore volume. As an electrode material for supercapacitors, WHCS exhibits excellent performance with a capacitance of 312 F ⋅ g−1 and remarkable cycle life stability, demonstrating its great potential for use in supercapacitors.