Praveen Sekar, Kim Taehyung, Jung Soon Phil, Lee Chang Woo
Department of Chemical Engineering (Integrated Engineering), College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung, Yongin, Gyeonggi, 17104, South Korea.
Center for the SMART Energy Platform, College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung, Yongin, Gyeonggi, 17104, South Korea.
Small. 2023 Jan;19(3):e2205817. doi: 10.1002/smll.202205817. Epub 2022 Nov 21.
Stretchable energy storage devices receive a considerable attention at present due to their growing demand for powering wearable electronics. A vital component in stretchable energy storage devices is its electrode which should endure a large and repeated number of mechanical deformations during its prolonged use. It is crucial to develop a technology to fabricate highly deformable electrode in an easy and an economic manner. Here, the fabrication of stretchable electrode substrates using 3D-printing technology is reported. The ink for fabricating it contains a mixture of sacrificial sugar particles and polydimethylsiloxane resin which solidifies upon thermal curing. The printed stretchable substrate attains a porous structure after leaching the sugar particles in water. The resulting printed porous stretchable substrates are then utilized as electrodes for Li-ion batteries (LIBs) after loading them with electrode materials. The batteries with stretchable electrodes exhibit a decent electrochemical performance comparable to that of the conventional electrodes. The stretchable electrodes also exhibit a stable electrochemical performance under various mechanical deformations and even after several hundreds of stretch/release cycles. This work provides a feasible route for constructing LIBs with high stretchability and enhanced electrochemical performance thereby providing a platform for realizing stretchable batteries for next generation wearable electronics.
由于对可穿戴电子产品供电的需求不断增长，可拉伸储能设备目前受到了广泛关注。可拉伸储能设备的一个关键组件是其电极，在长期使用过程中，电极应能承受大量且反复的机械变形。以简单且经济的方式开发一种制造高度可变形电极的技术至关重要。在此，报道了使用3D打印技术制造可拉伸电极基板。用于制造它的墨水包含牺牲性糖颗粒和聚二甲基硅氧烷树脂的混合物，该混合物在热固化时固化。在水中浸出糖颗粒后，打印出的可拉伸基板获得多孔结构。然后，在将所得的打印多孔可拉伸基板加载电极材料后，将其用作锂离子电池（LIB）的电极。具有可拉伸电极的电池表现出与传统电极相当的良好电化学性能。可拉伸电极在各种机械变形下甚至在数百次拉伸/释放循环后也表现出稳定的电化学性能。这项工作为构建具有高拉伸性和增强电化学性能的LIB提供了一条可行的途径，从而为实现下一代可穿戴电子产品的可拉伸电池提供了一个平台。
