“A new bifunctional non-precious metal electrocatalyst (capable of catalyzing two different types of reactions) can reduce costs and increase the efficiency of metal-air batteries,” said a statement released by the ministry.
He said that with increasing demand for different energy sources, global efforts are being made to develop different types of energy devices, such as lithium-ion batteries, lead-acid batteries, gas batteries. redox flux, lithium-air batteries, zinc-air batteries, sodium-ion batteries, fuel cells and supercapacitors.
The International Advanced Research Center for Powder Metallurgy and New Materials (ARCI), a stand-alone R&D center of the Department of Science and Technology (DST) of the Indian government, has developed a cost-effective electrocatalyst by anchoring transition metal ions in sulfur. carbon framework doped via carbonization of a polymer called sPEEK (sulfonate polyether ether ketone).
This catalytic synthesis method can also be used to recycle used ionomers (polymer composed of both neutral repeating units and ionized units).
The catalyst also results in reduced voltage bias, allowing for higher energy efficiency and a stable charge-discharge characteristic.
The results obtained were comparable to those of noble metal catalysts conventionally used with a metal loading of 20 percent or more. The research was published in the journal ACS Applied Energy Materials.
Scientists used an ion exchange strategy that positions metal ions in the carbon framework homogeneously, limits particle size, and provides composition and size control at a very low transition metal charge. .
Profitability is thus obtained by a low load of transition metal, a high activity and a high cycling stability compared to many catalysts reported previously.
Among them, Zn-air batteries have attracted a lot of attention due to their low cost and high energy density. They are compact power sources for portable electronic and electric vehicles and energy storage devices to manage the energy flow between renewable energy generators, such as wind turbines, photovoltaic panels, power grids and end users.