Rechargeable zinc–air batteries (ZAB) with solid‐state electrolyte are a potential power source for flexible electronic devices. However, solid electrolytes for the battery at large currents remain a challenge in bubble removal at the electrode surface and the small contact area of the electrolyte–electrode interface, as well as low conductivity itself. Herein, a three‐electrode structure is proposed for the solid‐state rechargeable ZAB, where the sodium polyacrylate (PAA‐Na) hydrogel serving as the electrolyte exhibits good mechanical properties, excellent water retention ability, and high conductivity (0.19 S cm⁻¹) after being soaked in potassium hydroxide and zinc acetate solution. The zinc electrode of porous structure is sandwiched by the electrolyte on both sides, facilitating ion transport during charge/discharge. MnO₂/C, as the catalyst of the air electrode, is in contact with the hydrogel, increasing the catalyst active area. Nickel mesh is the charging electrode which facilitates the removal of the evolved bubbles. The results demonstrate that rechargeable ZAB with the PAA‐Na hydrogel electrolyte can release a maximum power density of 100.7 mW cm⁻² and run for 183 cycles at a current density of 10 mA cm⁻², which can be a strong competitor in the flexible energy‐storage field.

中文翻译：

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新型固态锌空气电池，可快速充电

带有固态电解质的可充电锌空气电池（ZAB）是柔性电子设备的潜在电源。但是，用于大电流电池的固体电解质在去除电极表面的气泡，减小电解质与电极界面的接触面积以及降低电导率方面仍然是一个挑战。在此，提出了用于固态可充电ZAB的三电极结构，其中作为电解质的聚丙烯酸钠（PAA-Na）水凝胶具有良好的机械性能，优异的保水能力和高电导率（0.19 S cm ^-1）浸泡在氢氧化钾和醋酸锌溶液中后。多孔结构的锌电极两侧均被电解质夹在中间，在充放电过程中促进了离子的传输。MnO ₂ / C作为空气电极的催化剂，与水凝胶接触，从而增加了催化剂的活性面积。镍网是充电电极，可帮助去除所产生的气泡。结果表明，带有PAA-Na水凝胶电解质的可再充电ZAB可以释放100.7 mW cm ^-2的最大功率密度，并在10 mA cm ^-2的电流密度下运行183个循环，这可能是柔性电池的强大竞争对手。储能领域。