Abstract Exploitation and improvement of electrode materials mainly rely on the understanding of electrochemical reaction mechanisms. Here we provide a comprehensive perspective of Zn2+ storage behaviors in silver vanadates (e.g. Ag0.33V2O5, Ag1.2V3O8, Ag2V4O11, β-AgVO3, Ag4V2O7), which exhibit electrochemical redox multi-mechanisms. Ag0.33V2O5 with stable tunnel structure and low mole ratio of Ag/V demonstrates a combination of reversible displacement/intercalation reaction with good cyclic stability. Ag1.2V3O8 and Ag2V4O11 with layer structure and higher mole ratio of Ag/V show a reversible intercalation/de-intercalation reaction accomplished by an irreversible displacement reaction to form a highly conductive Ag0 matrix, leading to the high rate performance. The chain-like β-AgVO3 and isolated island-like Ag4V2O7 with unstable structure and the highest mole ratio of Ag/V reveal irreversible phase transition mechanism to form the amorphous matrix. The crystal structure is the decisive factor in the basic electrochemical properties, providing a new insight into battery energy storage mechanism.

中文翻译：

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揭示锌离子水电池中钒酸银阴极储能行为的结构透视

摘要 电极材料的开发和改进主要依赖于对电化学反应机理的理解。在这里，我们提供了钒酸银（例如 Ag0.33V2O5、Ag1.2V3O8、Ag2V4O11、β-AgVO3、Ag4V2O7）中 Zn2+ 存储行为的综合视角，它们表现出电化学氧化还原多机制。具有稳定隧道结构和低 Ag/V 摩尔比的 Ag0.33V2O5 展示了可逆置换/嵌入反应与良好循环稳定性的组合。具有层状结构和较高 Ag/V 摩尔比的 Ag1.2V3O8 和 Ag2V4O11 显示出可逆的嵌入/脱嵌反应，通过不可逆置换反应完成，形成高导电性的 Ag0 基体，导致高倍率性能。具有不稳定结构和最高Ag/V摩尔比的链状β-AgVO3和孤立岛状Ag4V2O7揭示了形成非晶基体的不可逆相变机制。晶体结构是基本电化学性能的决定性因素，为电池储能机制提供了新的见解。