Latest Publications

• Recent progress on reduced graphene oxide and polypyrrole composites for high performance supercapacitors: A review, Journal of Energy Storage (IF=9.4)

In this study, we present a high-performance FeS2 supercapacitor synthesized using a direct one-step process with the aid of polyvinylpyrrolidone (PVP). The incorporation of PVP addressed the limitations of FeS2, such as low energy density and poor conductivity, while facilitating a one-step synthesis. The FeS2/PVP nanocomposite exhibited excellent electrochemical properties, including a high specific capacity of 735 F g−1 (at 2 A g−1) and a high energy density of 69.74 W h kg−1 (at 911 W kg−1). PVP played a crucial role in enhancing ion movement and improving charge-carrier resistance and surface passivation. The findings offer new insights into novel supercapacitor electrodes with promising applications.

• Cationic surfactant assisted electrostatic self-assembly of nitrogen-rich carbon enwrapped silicon anode: Unlocking high lithium storage performance, Electrochimica Acta (IF=6.6)

In this study, poly (diallyldimethylammonium chloride) (PDDA) is employed as a cationic surfactant to tailor the surface potential of bare ball-milled Si particles, enabling the electrostatic self-assembly between Si particles and graphitic carbon nitride as the N-rich-C precursor. Continuous N-rich-C enwrapped ball-milled silicon (Si@N-rich-C) has been obtained after pyrolysis with a high N to C ratio of 0.65 and abundant pyridinic-N and pyrrolic-N, facilitating fast kinetic transport  and accommodating more Li+ ion storage. Combined with the high capacity of Si, Li-ion cell with Si@N-rich-C electrode exhibits a high capacity of 1732 mAh g−1 after 200 cycles of charge-discharge at 400 mA g−1. At high-rate testing, Si@N-rich-C also maintains a high capacity of 1673 mAh g−1 at 1000 mA g−1. This study provides an effective approach for synthesizing high-capacity silicon anode for Li-ion batteries. 

• Functionalized Phytochemicals-Embedded Carbon Dots Derived from Medicinal Plant for Bioimaging Application,ACS Applied Bio Materials (IF=4.7)

This work provides valuable insights into utilizing functionalized phytochemical-embedded carbon dots for bioimaging applications. The doping of nitrogen by adding urea showed an alteration of surface charge, which is more positive based on zeta potential measurement. The more positive CD particles showed that Andrographis paniculata-urea-based CDs were the best particles to penetrate cells than others related to the alteration of the surface charge and the functional group of the CDs, with the optimum dose of 12.5 μg/mL for 3 h of treatment for bioimaging assay.