Sonochemical synthesis, characterization and investigation of the electrochemical hydrogen storage properties of TlPbI_3/Tl_4PbI_6 nanocomposite

摘要

Hydrogen storage is an important technology for the promotion of fuel cell and hydrogen technologies in applications such as transportation, portable power, and stationary power. Hydrogen possesses the most energy per mass of each fuel; despite its low room temperature density leads to a low energy per unit volume, since demanding the improvement of high-level storage techniques that possess the potential for higher energy density. For this regard, novel nanocomposite (TlPbI3/Tl4PbI6) has been fabricated for electrochemical hydrogen storage by the importance of the optimum state to obtain higher efficiency. TlPbI3/Tl4PbI6 nanocomposite was prepared by a facile and low-cost sonochemical pathway. The sonochemical method performs a significant figure in the synthesis of nanostructures with large surface area and tiny crystal size, characteristics that are useful for electrochemical hydrogen storage. The influence of multiple factors, including stoichiometric ratios, types of surface-active agents, time, and power of sonication was studied on the structure, purity, shape, size, and uniformity of the samples. The electrochemical characteristics of the TlPbI3/Tl4PbI6 were examined via charge-discharge chronopotentiometry procedures in an alkaline medium. The discharge capacity of TlPbI3/Tl4PbI6 with particle shape was evaluated 61.45 mAhg(-1) after 15 cycles. The discharge capacity nanocomposite with rod-like structure was calculated 99.06 mAhg(-1). The results confirm that the hydrogen storage capacity for rod-like samples is higher than particle shape nanocomposite, and the capacity reduces by enhancing the diameters of rods. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.