2 research outputs found
Self-assembled 3D hierarchical Mo2S3 flowers from wrinkled sheets for enhanced electrochemical energy storage performanc
No full textIn this study, wrinkled sheets of molybdenum sulfide Mo2S3 were self-assembled into 3D hierarchical flowers via a simple hydrothermal technique. Additionally, binary (Mo2S3/CNTs) and ternary (Mo2S3/CNTs/gCN) composites were synthesized through ultrasonication route. Synergistic effect of 3D Mo2S3 flowers with 1D CNTs and gCN strengthen and heighten electrochemical properties of Mo2S3/CNTs/gCN composite. The GCD graph of Mo2S3/CNTs/gCN composite endorsed greatest specific capacitance 1309 F/g at 1 A/g with highest discharge time period
(1414 s). Though, the discharge time for Mo2S3/CNTs and Mo2S3 was 495 s and 330 s with specific capacitance 458 F/g and 306 F/g respectively. The significantly improved electrochemical properties of Mo2S3/CNTs/gCN composite professed via CV curves and GCD data are authorized to the outstanding architecture of the material. TheMo2S3/CNTs/gCN composite also shows greater ion diffusion and outstanding capacitive behavior. In composite electrode, Mo2S3 flowers with CNTs and gCN organize a unique architecture which improves the ionic movement in all the three directions due to 3D hierarchical structure. In conclusion, the advanced proficiency of our as-designed working electrode (Mo2S3/CNTs/gCN composite) is a promising choice for energy storage systems.This is a manuscript of an article published as Katubi, Khadijah MohammedSaleh, Nusrat Shaheen, Eric W. Cochran, Tahani Rahil Aldhafeeri, Z. A. Alrowaili, M. S. Al-Buriahi, Muhammad Farooq Warsi, and Sonia Zulfiqar. "Self-Assembled 3D Hierarchical Mo2S3 Flowers from Wrinkled Sheets for Enhanced Electrochemical Energy Storage Performance." Journal of the Indian Chemical Society (2025): 101645. doi: https://doi.org/10.1016/j.jics.2025.101645
Embedded Platinum–Cobalt Nanoalloys in Biomass-Derived Laser-Induced Graphene as Stable, Air-Breathing Cathodes for Zinc–Air Batteries
No full textFuel
cells and metal–air batteries hold significant promise
to help decarbonize transportation and the electricity grid. To encourage
widespread adoption of these technologies, improvements to their air-breathing
cathodes are required, which address problems such as the high cost
of platinum (Pt) catalysts used to boost the kinetics of the oxygen
reduction reaction (ORR) as well as the stability of Pt/C interfaces
over long-term cycling. In this paper, we demonstrate a facile approach
to reduce Pt content to less than 2 wt % by interfacing Pt with CoOx as well-dispersed nanoparticles entrapped within
a highly conductive laser-induced graphene (LIG) matrix. Laser-induced
carbonization of polymerized furfural alcohol preloaded with Co and
Pt precursors resulted in the formation of a mixture of spherical
nanoalloys PtCoOx and core (CoOx)–shell (Pt) structures. This LIG-PtCoOx electrode exhibited a low onset and half-wave
potential in alkaline media, which closely approached a benchmark
Pt/C. The effectiveness of LIG-PtCoOx was
demonstrated by its performance in rotating disk and rotating ring
disk electrode studies versus commercial Pt/C with the same concentration
of the catalyst, which resulted in 4-fold greater mass activity and
more than 6-fold higher specific activity, which are reflected in
a high turnover frequency (TOF). The resulting material was tested
as an air–cathode for zinc (Zn)–air batteries leading
to improved stability (118 h of operation) and rechargeability (0.75
V voltage gap), exhibiting a higher peak power density compared to
batteries assembled with the commercial benchmark Pt/C cathodes with
similar composition
