Bismuth metal organic framework-derived Bi2Se3@C for high performance supercapacitors

Abstract

A series of Bi₂Se₃@C materials were prepared through a bismuth metal organic framework (CAU-17) assisted hydrothermal selenization method followed by carbonization, which have been found to be useful as electrode materials for supercapacitor application. The Bi₂Se₃@C obtained below 500 °C seems to show an excellent specific capacity of 565.9 C g⁻¹ at a current density of 1 A g⁻¹. Furthermore, the performance of Bi₂Se₃@C in symmetrical supercapacitors (SSCs) is also systemically investigated, and the SSC device achieves a maximum energy density of 39.3 W h kg⁻¹ at a power density of 639.9 W kg⁻¹ and maintains 90.5% of this capacity over 1000 cycles.