Facile synthesis of Sb-Sb2O5@P@C composite and study for the supercapacitor application
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A Sb-Sb2O5@P@C composite was synthesized using a two-step high-energy mechanical milling (HEMM) method using metal antimony, red phosphorus, and carbon as raw materials. XPS, XRD, and Raman spectroscopy clearly showed that the Sb was partially oxidized to become Sb2O5 during the milling process and that some of the red phosphorus was converted to black phosphorus. A specific capacitance of 109.7 F g−1 was achieved at a current density of 0.5 mA cm-2 in the obtained Sb-Sb2O5@P@C composite, and the packaged supercapacitor prepared with the Sb-Sb2O5@P@C composite was found to maintain a capacitance retention of 77.3% after 5000 cycles at a current density of 2 A g−1. This study therefore provides a possible direction for the selection of electrode materials the perform well for application in supercapacitors.
KeywordsHEMM Sb-Sb2O5@P@C Black phosphorus Supercapacitor Capacitance retention
This research was funded by Beijing Natural Science Foundation (Grant No. 2184134), Tianjin Natural Science Foundation (Grant No. 18JCZDJC99800), National Natural Science Foundation of China (Grant No. 51502203), Tianjin Young Overseas High-level Talent Plans (Grant No. 01001502), Tianjin Science and Technology Foundation (Grant No. 17ZXZNGX00090) and Tianjin Development Program for Innovation and Entrepreneurship.