Breaking the capacity bottleneck of lithium-oxygen batteries through reconceptualizing transport and nucleation kinetics.

The practical capacity of lithium-oxygen batteries falls short of their ultra-high theoretical value. Unfortunately, the fundamental understanding and enhanced design remain lacking, as the issue is complicated by the coupling processes between LiO nucleation, growth, and multi-species transport. Herein, we redefine the relationship between the microscale LiO behaviors and the macroscopic electrochemical performance, emphasizing the importance of the inherent modulating ability of Li ions through a synergy of visualization techniques and cross-scale quantification.

The advantage of point-of-care ultrasound in central venous catheterization and related pericardial effusion in infants in the NICU.

Background: Central venous catheterization (CVC) is broadly used in neonatal intensive care units (ICUs) for efficient vascular access; however, its establishment and maintenance are associated with numerous risks and complications. Here, we focus on investigating the value of point-of-care ultrasound (POCUS) in the early diagnosis and treatment of pericardial effusion associated with CVC and compare the differences in ultrasound and radiography in CVC localization and monitoring in the NICU.

Methods: Twenty-five infants with CVC-associated pericardial effusion (PCE) who were hospitalized in the NICU of Peking University Third Hospital between January 2013 and March 2023 were retrospectively selected for the study.