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IMAGE: (a) Schematic illustration of the K-ion full battery based on the as-prepared BCC and Prussian Blue (PB). (b) Charge-discharge profiles of the half battery and full battery. (c) Cycling stability. view more
Credit: @Science China Press
With the rapid development of smart portable electronics and electric vehicles, the consumption of lithium resource will increase dramatically and the cost of lithium-ion batteries (LIBs) may increase significantly in the future. In addition, the shortage (0.0017 wt% in the earth s crust) and uneven crustal distribution of lithium also limit its further development and application. As potassium (2.7 wt% in the earth s crust) have properties similar to lithium and abundant reserves. Therefore, as an alternative to LIBs, potassium ion batteries (PIBs) have become the focus of research. Potassium (2.92 V vs. standard hydrogen electrode) has a standard electrode potential closer to Li (3.04 V vs. SHE) than the standard electro