A novel Cr2O3-carbon composite as a high performance pseudo-capacitor electrode material

Novel graphitic material containing chromium oxide (Cr2O3) nanoribbons is obtained by carbonizing a mixture of polyfurfuryl alcohol and MIL-101(Cr) at 900 degrees C. Morphological, structural, and chemical analysis of the product is carried out with HR-TEM, SEM, XPS, XRD, and BET surface area. The maximum BET surface area recorded for the nanocomposite is 438 m(2) g(-1). The nanocomposite exhibits a specific capacitance as high as 300 F g(-1) at 2 mV s(-1) and 291 F g(-1) at 0.25 A g(-1), and presents 95.5% long-term cycling stability over 3000 cycles. The pseudo-capacitive role of Cr2O3 nanoribbons is found to be important towards total capacitance of nanocomposite material. (C) 2015 Elsevier Ltd. All rights reserved.