over 3000 cycles at 8 A g -1 . The increased energy storage performance is attributed to the heteroatoms such as boron and nitrogen that form polar covalent bond thereby assisting the ion transport between electrode and electrolyte. In another study, the same group produced the boron carbonitride by first dissolving the mixture sodium borohydride and 2, 4, 6 tri-(2pyridyl)-1, 3, 5-triazine in acetonitrile as a solvent under reflux at 70 °C followed by thermal annealing at three different temperatures (800, 900 and 1000 °C) under nitrogen atmosphere . From XPS analysis, it was revealed that the content of both boron and oxygen increases with temperature while the content of carbon deceases with temperature. However, the content of nitrogen initially decreases and then increases with temperature. The electrochemical capacitance results demonstrated that among the three different samples, the sample obtained