Porous rare earth-transition metal bimetallic oxide nanoparticles oxygen electrocatalyst for rechargeable Zinc-air battery

Graphene-Loaded Bimetallic Oxide Nanoparticle Oxygen Electrode Materials for Rechargeable Zinc–Air Batteries

“…The results of the analysis of the air central catalyst’s discharge activity, as shown in figure, reveals the cathode of ZABs. Figure a , displays the polarization curves of the discharge. The catalyst shown in Figure b has peak power densities of 80 mW cm –2 and 127 mA cm –2 , which are nearly equivalent to the values of Pt/C (111 mW cm –2 and 185 mA cm –2 ).…”

Construction of Bimetallic-Anchored Two-Dimensional Nanosheets on COF for Rechargeable Zinc-Air Batteries

“…32,33 Moreover, the catalytic activity and electrical conductivity of the catalyst can be greatly improved because high-temperature carbonization leads to an obvious transition from pyridine nitrogen to graphitic nitrogen. 34 It is worth saying that excellent bifunctional activity of the prepared catalyst was observed in the test in an alkaline medium, which has a halfwave potential of 0.86 V and an overpotential of 310 mV. The performance of our prepared catalyst was better in comparison with the simultaneous assembly of the cell with Pt/C + RuO 2 with stability of up to 180 h, an open-circuit voltage of 1.472 V, and a power density and specific capacity of 189 mW cm −2 , 548 mAh g −2 , and 548 mAh g −1 ; so according to the test results, it can be seen that this catalyst provides better ideas and potentials for the preparation of COF materials to be applied in the direction of new air batteries.…”

“…For decades, green chemistry, energy regeneration, and other energy issues have been a problem that all researchers have been trying to solve. − Over the years, the large amount of primary energy inputs has led to a gradual increase in the proportion of global pollution, along with the depletion of nonrenewable energy problems, so there is an urgent need for secondary energy technology that can be used as a substitute. − According to literature research, zinc-air batteries have great potential as a secondary energy technology because of their huge theoretical energy. − Although it has great potential, the slow kinetics of the oxygen reduction and oxygen precipitation reactions during the charging and discharging process of zinc-air batteries lead to low cycle efficiency, which prevents the batteries from being used on a large scale. Pt-based noble metals are considered to be the ideal catalysts for zinc-air batteries, but due to their scarcity, they are not available for large-scale applications due to their high cost. − Therefore, according to the literature, it was found that in recent years, many researchers have done a lot of work on the nonprecious metal catalysts used, − such as doped transition metal oxides, synthesized MOFs and COFs, carbon-based materials containing metals, and so on, in place of precious metals. − Although a lot of beautiful work has been done and quite high performance has been shown, it is still not up to the desired level. Therefore, the design of catalysts for zinc-air batteries still requires efforts to develop an effective method to replace precious metals.…”

Metal–Organic Skeleton-Derived P-CoFe2O4@CN Nanoparticles Embedded with Nitrogen-Doped Carbon as Effective Electrocatalysts for the Oxygen Evolution Reaction

“…So far, RuO 2 and IrO 2 catalysts are recognized as efficient catalysts for the OER. However, their high cost and scarcity have hindered their large-scale application. − Therefore, the development of inexpensive OER nonprecious metal catalysts with high activity and the ability to be substituted for precious metals remains a problem that has to be resolved.…”