Aqueous zinc‐ion batteries (AZBs) degrade under a high current density due to the existence of interfacial turbulence with severe concentration polarization. Herein, an ion redistribution gel electrolyte is introduced to stabilize the electrode‐electrolyte interface by regulating the ion density gradient. Negatively charged carboxymethyl groups in carboxymethyl starch ether polymer (PCMS) electrolytes can preferentially regulate the ion concentration at the anode interface. The quasi‐solid PCMS gel electrolytes can dissipate the charge accumulation caused by ion concentration differences, which is beneficial for achieving excellent electrochemical stability at high current densities. As a result, the symmetric Zn cells with PCMS gel electrolyte can be cycled for more than 2000 h at a high current density of 40 mA cm−2. Furthermore, the Zn//I2 cell using PCMS gel electrolyte also sustained cycling for over 8000 cycles, and the pouch cell with PCMS gel electrolyte exhibited practical deformable applications in flexible devices. This work highlights an effective gel electrolyte approach for enhancing interfacial stability, potentially advancing the development of highly reversible AZBs.

中文翻译：

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离子再分布凝胶电解质消散水性锌离子电池的界面湍流


由于存在具有严重浓度极化的界面湍流，水性锌离子电池 （AZB） 在高电流密度下会降解。在此，引入了离子再分布凝胶电解质，通过调节离子密度梯度来稳定电极-电解质界面。羧甲基淀粉醚聚合物 （PCMS） 电解质中带负电荷的羧甲基可以优先调节阳极界面处的离子浓度。准固体 PCMS 凝胶电解质可以消散由离子浓度差异引起的电荷积累，有利于在高电流密度下实现优异的电化学稳定性。因此，具有 PCMS 凝胶电解质的对称 Zn 电池可以在 40 mA cm-2 的高电流密度下循环超过 2000 小时。此外，使用 PCMS 凝胶电解质的 Zn//I2 电池也持续循环超过 8000 次循环，而使用 PCMS 凝胶电解质的软包电池在柔性器件中表现出实际的可变形应用。这项工作强调了一种有效的凝胶电解质方法，可增强界面稳定性，有可能推动高度可逆 AZB 的开发。