Moisture-based power generation technologies have received great attention in recent years. Although high output potential has been achieved, current systems suffer from the inability to continuously generate electricity with high power density for practical applications such as wearable and self-powered devices. Here, we report a moisture-sustained electric generator made from an ionic liquid (ILs) film supported by defect-engineered metal–organic frameworks (MOFs)/graphene oxide membranes. Our device can continuously generate power with an improved power density of up to 109.2 μW cm⁻² and an energy density of 31.45 J cm⁻² when placed under a humidity gradient. We ascribed the high performance to the retention effect of the defect-abundant MOFs membrane, which integrates high porosity and unpaired N-terminals to block the movement of cation clusters but allow the directional diffusion of moisture-liberated anions within the ILs, resulting in a sustainable anion/cation diode-like selective ion transport and improved charge separation for energy conversion.

中文翻译：

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离子纳米复合材料中缺陷增强的选择性离子传输，用于从水分中高效收集能量

近年来，基于水分的发电技术受到了极大的关注。尽管已经实现了高输出潜力，但当前系统无法为可穿戴和自供电设备等实际应用持续产生高功率密度的电力。在这里，我们报告了一种由离子液体（ILs）薄膜制成的保湿发电机，该薄膜由缺陷工程金属有机框架（MOFs）/氧化石墨烯膜支撑。我们的器件可以连续发电，功率密度提高到 109.2 μW cm ^-2，能量密度达到 31.45 J cm ^-2当放置在湿度梯度下时。我们将高性能归因于缺陷丰富的 MOFs 膜的保留效果，该膜集成了高孔隙率和不成对的 N 末端来阻止阳离子簇的运动，但允许水分释放的阴离子在 ILs 内定向扩散，从而产生可持续的阴离子/阳离子二极管类选择性离子传输和改进的能量转换电荷分离。