Lithium-ion batteries (LIBs) are primarily used for advanced portable electronic devices. However, the cost disadvantage and global scarcity of lithium resources restrict the LIBs for cost efficient large scale applications. Recently, potassium-ion (K-ion) batteries have received considerable attention as a potential post-lithium ion energy storage device due to their low cost and abundance.
Germanium selenide (GeSe) is the most attractive group IV chalcogenide (MX, M = Si, Ge, Sn, X = S, Se) as the anode material, because of its structural robustness with isotropic kinetics and high rate capability. Furthermore, Se is much more polarizable than S and therefore conducts alkali-ion much faster than S.
Herein, we for the first time report on the potassium ion storage mechanism and use of GeSe in the anode materials for PIBs. More details on the synthetic procedure, electrochemical and structural properties will be presented at the meeting.