Back Cover Image, Volume 6, Number 12, December 2024

Back cover image: Analyzing dynamic processes within Li rechargeable battery cells without disassembly is important to understand the underlying reaction mechanisms and develop next-generation batteries. In the image, the left-enlarged fi gure of the green cylindrical battery is divided into three parts: top, middle, and bottom. Examining the crystal structure of electrode materials (top), the dynamics of Li ions (middle), and the morphology of electrodes (bottom) through in situ analysis enables the collection of ‘live’ data that ex situ cannot achieve. This review comprehensively details in situ analytical techniques applicable to Li rechargeable batteries, utilizing various sources, including electromagnetic waves, electrons, neutrons, and others. Article number: 10.1002/cey2.549