Effect of Li₂CoMn₃O₈ Nanostructures Synthesized by a Combustion Method on Montmorillonite K10 as a Potential Hydrogen Storage Material

Abstract

This paper outlines new design nanocomposites (Li 2 CoMn 3 O 8 /K10) for electrochemical hydrogen storage with an emphasis on the optimal conditions to achieve higher performance. Li 2 CoMn 3 O 8 /K10 nanocomposites were fabricated by loading different ratios of the Li 2 CoMn 3 O 8 (5%, 10%, and 20%) inside the montmorillonite K10. Electrochemical properties of the samples montmorillonite K10, Li 2 CoMn 3 O 8 , and the respective nanocomposites were studied by chronopotentiometry charge−discharge techniques in alkaline medium. The Li 2 CoMn 3 O 8 nanostructures were synthesized by a facile combustion method in the presence of various carboxylic acids as fuel and capping agents. The influence of carboxylic acids on the size, morphology, and homogeneity of the samples was examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). X-ray diffraction (XRD), energy-dispersive X-ray (EDX), and Fourier transform infrared (FT-IR) were applied to investigate the purity and chemical compositions of the samples. The electrochemical hydrogen storage performances of the samples were identified on the basis of a discharge capacity at the 15th cycle of 1041 mAhg −1 for pristine K10 which increases with a raise in ratio of Li 2 CoMn 3 O 8 . The discharge capacity for K10 by adding 20 wt % nanoparticles rises to 1302 mAhg −1 . Our results indicate that modifying by means of Li 2 CoMn 3 O 8 nanoparticles can be a promising low-cost method to improve electrochemical performance of various hydrogen storage materials including montmorillonite K10.

Design of Magnetically Recyclable Ternary Fe2O3/EuVO4/g-C3N4 Nanocomposites for Photocatalytic and Electrochemical Hydrogen Storage

“…Previous literature reported that coupling the magnetic and electric parameters can create magnetoelectric structures that can modify the energy storage ability through electrochemical methods. 57 The obtained hysteresis loop is a small, narrow hysteresis loop. The narrow hysteresis loop points small dissipated energy.…”

“…On the other hand, the magnetic properties for as-fabricated nanocomposites are interesting due to the correlation between magnetic and electrical properties for electrochemical energy storage applications. Previous literature reported that coupling the magnetic and electric parameters can create magnetoelectric structures that can modify the energy storage ability through electrochemical methods . The obtained hysteresis loop is a small, narrow hysteresis loop.…”

Decoration of green synthesized S, N-GQDs and CoFe2O4 on halloysite nanoclay as natural substrate for electrochemical hydrogen storage application

“…The obtained peaks at 753, 691 and 537 cm −1 are related to bending bonds of Si–O-Al. The bonds at 1033 cm −1 refer to Si–O and OH vibrations in the halloysite units that appear at 791 cm −1 37 , 38 . Metal-oxide vibrations (465 and 539 cm −1 ) in cobalt ferrite and halloysite overlap with each other.…”

Preparation and study of characteristics of LiCoO2/Fe3O4/Li2B2O4 nanocomposites as ideal active materials for electrochemical hydrogen storage

“…These chemical methods include ultrasonic-based precipitation, microwave-based precipitation, fuel-assisted sol-gel method, solvothermal and thermal treatment routes. [7][8][9][10] The metal oxide materials applied in the energy storage elds are comprehensive such as borate, vanadate, spinels, and perovskites. The central metals in these structures usually are cobalt, iron, nickel, magnesium, zinc, etc.…”