2D-black phosphorus/polyaniline hybrids for efficient supercapacitor and hydrogen evolution reaction applications

Abstract

With the emergence of wearable and portable electronics, solid-state supercapacitors are considered a promising candidate to power electronic devices because of their interesting features compared to existing energy storage devices....

Hierarchal Growth of Integrated n-MoS2/p-Black Phosphorus Heterostructures for All-Solid-State Asymmetric Supercapacitor Electrodes

“…It unequivocally demonstrated that the high porosity material served as an electrolyte ion reservoir, enhancing the diffusion rate and electrochemical charge storage capabilities. 23 Figure S4a depicts the TEM images of MB 60, unveiling flower-like MoS 2 grown over BP. Figure S4b represents a crystal distance of 0.34 nm, corresponding to the (021) lattice plane of BP, and lattice fringes of 0.63 nm, corresponding to the 2H MoS 2 .…”

“…The BP sheets with a huge number of ion channels and a randomly arranged structure improved the charge storage kinetics, electrolyte interaction, and the significantly accelerated fast ion intercalation. 23 For MB 60 tested in a 0.5 M Na 2 SO 4 aqueous electrolyte, we calculated the energy density to be 6.48 (Wh kg −1 ) using eq S3 at a current density of 1 A g −1 that yielded a power density of around 468 W kg −1 (eq S4). The energy density at a current density of 5 A g −1 was approximately 2.07 Wh kg −1 , while the power density was 2193 W kg −1 (Figure S6d).…”

“…BP expands along the z-axis bridge bond under van der Waal stress, which is the last step. 23,29,30 3.1.2. n−p Heterostructure Formation Mechanism. Compared to P atoms, the energy required to lose an electron from a S atom is less.…”

“…21 Previously, our group demonstrated that forming heterostructures with BP improves the performance of pseudocapacitive 2D materials like VS 2 22 and conducting polymers such as PANI. 23 To exemplify, the addition of BP to VS 2 increased the number of electrochemical active sites, resulting in enhanced surface activity. The as-synthesized cathode material synergistically enhanced the electrochemical behavior via accelerated reaction kinetics with ions in the electrolyte.…”

Preparation of Anionic Surfactant-Based One-Dimensional Nanostructured Polyaniline Fibers for Hydrogen Storage Applications

“…In order to confirm the efficiency of hydrogen sorption, the Pressure-Composition-Temperature (PCT) analysis was performed at room temperature for the polyaniline fiber. We found that a distinct variable pressure forms an effective hydride around 30 bar up to 2 wt% hydrogen uptake and a linear region of 2.5 wt% with a total absorption capacity of 3.5 wt% [ 50 , 51 , 52 ].…”