Researchers develop approach for creating tight arrangement of bilayer alkali metals between graphene layers for improved batteries
Researchers at AIST, Osaka University, Tokyo Polytechnic University, Kyushu University, and National Tsing Hua University, have developed a technique to insert alkali metals (AMs) into the interlayers of graphene. They them used low-voltage scanning transmission electron microscopy (LV-STEM) to visualize the atomic structure of the intercalated AMs (potassium, rubidium, and cesium) in the bilayer graphene (BLG). The team’s findings revealed that the intercalated AMs adopt bilayer structures with hcp stacking, and specifically a C6M2C6 composition.
The performance of rechargeable batteries is a key factor influencing the driving distance of electric vehicles and the usage time of smartphones. Improving the performance of these electronic devices is possible if rechargeable batteries can accumulate greater electrical capacities. Graphite, the electrode material used in batteries, is composed of multilayers of graphene, with alkali metals placed between the layers to facilitate the flow of electrons during charging and discharging. Achieving a high density of alkali metals storage between graphene layers could increase the electric capacity.
Source: https://www.graphene-info.com/researchers-develop-approach-creating-tight-arrangement-bilayer-alkali-metals
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