The concept of utilizing anionic redox reactions to achieve high energy batteries has been revived for almost a decade by now; however, both its fundamental mechanism and practical implementation remain elusive and highly debated. In this issue of Joule, Weixin Song, Peter D. Nellist, and co-workers utilized electron ptychography to image the oxygen sublattice distortion of a Li-rich material that is known to involve oxygen redox reactions. Through the dose-efficient ptychography reconstruction with picometer resolution, they provide a beautiful demonstration of detecting the atomic placements of both the heavy, i.e., transition metals, and light, i.e., O and Li, elements of the Li-rich electrode at different electrochemical states, inspiring valuable discussions on the oxygen activities in battery cathodes.

利用阴离子氧化还原反应实现高能电池的概念到现在已经复活了近十年。然而，其基本机制和实际实施仍然难以捉摸，并且备受争议。在本期Joule中，Weixin Song、Peter D. Nellist 及其同事利用电子拼图技术对已知涉及氧氧化还原反应的富锂材料的氧亚晶格畸变进行成像。通过具有皮米分辨率的剂量有效的 ptychography 重建，它们提供了在不同电化学条件下检测富锂电极的重元素（即过渡金属）和轻元素（即 O 和 Li）的原子位置的精美演示。州，激发了关于电池正极中氧活性的有价值的讨论。