Biological Nanofibrous Generator for Electricity Harvest from Moist Air Flow
Biological Nanofibrous Generator for Electricity Harvest from Moist Air Flow
复制标题
DOI：
10.1002/adfm.201901798
复制
发表时间：
2019-08-01
影响因子：
19
通讯作者：
Li, Chaoxu
中科院分区：
文献类型：
--
作者：
Li, Mingjie;Zong, Lu;Li, Chaoxu
利用基于碳纳米材料的纳米发电机，从无处不在的水中获取电力，以获得可再生和清洁能源，并科普化石能源枯竭和污染。与此同时，尽管许多生物有机体可以利用水来产生生物电，但在自然界中生产基于生物纳米材料的生物纳米发电机仍然具有挑战性，年产量达数十亿吨。在本文中，生物纳米原纤维，包括纤维素、几丁质、丝素蛋白和淀粉样蛋白，通过生物质的液体剥离或通过生物大分子的超分子组装来产生。由于其固有的亲水性和带电状态，它们可以从空气中捕获水分并形成水合纳米通道，类似于细胞膜的离子通道。当将气凝胶暴露在潮湿的空气流中时，水的吸收和蒸发达到平衡，从而在气凝胶上产生流动电位和开路电压。这些生物纳米发电机具有灵活性、可持续性、生物相容性和生物降解性，可以从自然界中的潮湿空气流中获取电力（例如，风、呼吸和汗液）和工业中，并且用于环境友好、低成本、高效率、可穿戴和小型化的功率器件。
Electricity harvest from ubiquitous water has been endeavored, using nanogenerators based on carbon nanomaterials, to acquire renewable and clean energy and cope with fossil depletion and pollution as well. Meanwhile, though many biological organisms can harness water for bioelectricity, it is still challenging to produce biological nanogenerators based on biological nanomaterials with billions of tons of annual production in nature. Herein biological nanofibrils, including cellulose, chitin, silk fibroin, and amyloid, are produced either by liquid-exfoliation of biomasses or by supramolecular assembly of bio-macromolecules. With the intrinsic hydrophilicity and charged states, they can capture moisture from air and form hydrated nanochannels, in analogue to ionic channels of cytomembranes. When exposing their aerogels to moist air flow, there is a balance of water absorption and evaporation, thus producing a streaming potential and an open-circuit voltage across the aerogel. With flexibility, sustainability, biocompatibility, and biodegradability, these biological nanogenerators can harvest electricity from moist air flow in nature (e.g., wind, respiration and perspiration) and in industry, and serve for environmentally-friendly, low-cost, high-efficiency, wearable, and miniaturized power devices.