Green Steel: Reduction of iron ore by hydrogen plasma.Green Steel: Direct reduction of iron ore with hydrogen.Pellets for Hydrogen-Based Green Steel Making. "In effect, the proposed design rule lays a solid groundwork for exploring new superionic conductors with superior charge–discharge performance, even at room temperature," concludes Prof. This study provides a new way for preparing high-entropy solid electrolytes for millimeter-thick electrodes while preserving their superionic conduction pathways. Theoretical calculations suggested that the enhanced conductivity of the solid electrolyte could be a result of the flattening of the energy barrier for ion migration, caused by a small degree of chemical substitution in the above-mentioned crystal. The former and latter ASSLB exhibited discharge capacities of 26.4 mAh cm −2 at 25 ☌ (1 mm) and 17.3 mAh cm −2 at −10 ☌ (0.8 mm), respectively, with the area-specific capacity 1.8 and 5.3 times larger than those reported for previous state-of the-art ASSLBs, respectively. The researchers used a crystal with Ge = M and δ = 0.4 as a catholyte in an ASSLB with an 1- or 0.8- millimeter-thick cathode. They modified the LGPS-type Li 9.54Si 1.74P 1.44S 11.7Cl 0.3 via multi-substitution and synthesized a series of crystals with composition Li 9.54 1.74P 1.44S 11.1Br 0.3O 0.6 (M = Ge, Sn 0 ≤ δ ≤ 1). For the design of their new material, the team took inspiration from the chemical compositions of two well-known Li-based solid electrolytes: argyrodite-type (Li 6PS 5Cl) and LGPS-type (Li 10GeP 2S 12) superionic crystals. This was where they started their research. "Many studies have shown that inorganic ionic conductors tend to show better ion conductivity after multi-element substitution probably because of the flattened potential barrier of Li-ion migration, which is essential for better ion conductivity," points out Prof. Their work establishes a design rule for synthesizing high-entropy crystals of lithium superionic conductors via the multi-substitution approach. Ryoji Kanno from Tokyo Institute of Technology (Tokyo Tech)-describes a new strategy to produce solid electrolytes with enhanced Li-ion conductivity. The paper-authored by a team of researchers led by Prof. The issue becomes more pronounced in thick battery cathode electrode such as millimeter-thick one, which is a more advantageous electrode configuration for realizing inexpensive and high-energy-density battery package, compared to conventional electrode with typical thickness of <0.1 mm.įortunately, a study published in Science found a way to overcome this problem. This, in turn, leads to a loss of capacity in the solid-state battery. However, their stiffness results in poor wetting of the cathode surface and a lack of homogenous supply of Li ions to the cathode. Solid electrolytes not only make the battery safer from leakage and fire-related hazards, but also provide superior energy and power characteristics. In recent years, all-solid-state lithium batteries (ASSLBs) have captured research interest due to their unique use of solid electrolytes instead of conventional liquid ones. Scientists from across the globe are working towards designing smaller yet efficient batteries that can keep up with the ever-increasing demand for energy storage. As the world transitions towards a greener and more sustainable energy economy, reliance on lithium (Li)- ion batteries is expected to rise.
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