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Potassium‐Ion Batteries
Oxygen vacancies near the Bi2Sn2O7 surface amplify the Schottky effect, emphasizing the role of defect and junction engineering in enhancing electrochemical kinetics and diffusion for potassium‐ion batteries, while boosting ordered bipolar carrier transport. More details can be found in article number 2305342 by Yi‐Yen Hsieh and Hsing‐Yu Tuan.
An oxygen vacancy‐tailored Schottky heterostructure composed of polyvinylpyrrolidone‐assisted Bi2Sn2O7 (PVPBSO) nanocrystals and moderate work function graphene (mWFG, WF = 4.36 eV) is designed, which in turn intensifies the built‐in voltage and interface dipole across the space charge region (SCR), leading to the inversion of majority carriers for facilitating K+ transport/diffusion behaviors. Thorough...