Back cover image: Li-rich Mn-based oxide (LMO) has been regarded as a promising candidate cathode for next-generation high energy density batteries. However, it suffers from serious electrochemical polarization at high rates, and in article number 10.1002/cey2.272, Xifei Li and coworkers reported a Prussian blue (PB) coating layer with specific redox potential, which facilitates to reduce the large polarization of electrode because of the synchronous redox reaction between coating layer and LMO. This work provides a new strategy to address the polarization issue upon various electrodes.

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封底图片，第 5 卷，第 5 期，2023 年 5 月

封底图片：富锂锰基氧化物 (LMO) 被认为是下一代高能量密度电池的有前途的候选阴极。然而，它在高速率下存在严重的电化学极化，在文章编号 10.1002/cey2.272 中，Xifei Li 及其同事报道了具有特定氧化还原电位的普鲁士蓝 (PB) 涂层，这有助于减少电极的大极化，因为涂层和LMO之间的同步氧化还原反应。这项工作为解决各种电极上的极化问题提供了一种新策略。