Dong Chaoqun, Leber Andreas, Yan Dong, Banerjee Hritwick, Laperrousaz Stella, Das Gupta Tapajyoti, Shadman Shahrzad, Reis Pedro M, Sorin Fabien
Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
Institute of Mechanical Engineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
Sci Adv. 2022 Nov 11;8(45):eabo0869. doi: 10.1126/sciadv.abo0869.
A robust power device for wearable technologies and soft electronics must feature good encapsulation, high deformability, and reliable electrical outputs. Despite substantial progress in materials and architectures for two-dimensional (2D) planar power configurations, fiber-based systems remain limited to relatively simple configurations and low performance due to challenges in processing methods. Here, we extend complex 2D triboelectric nanogenerator configurations to 3D fiber formats based on scalable thermal processing of water-resistant thermoplastic elastomers and composites. We perform mechanical analysis using finite element modeling to understand the fiber's deformation and the level of control and engineering on its mechanical behavior and thus to guide its dimensional designs for enhanced electrical performance. With microtexture patterned functional surfaces, the resulting fibers can reliably produce state-of-the-art electrical outputs from various mechanical deformations, even under harsh conditions. These mechanical and electrical attributes allow their integration with large and stretchable surfaces for electricity generation of hundreds of microamperes.
用于可穿戴技术和柔性电子设备的强大功率器件必须具备良好的封装、高可变形性和可靠的电输出。尽管二维（2D）平面功率配置的材料和架构取得了重大进展，但由于加工方法的挑战，基于纤维的系统仍局限于相对简单的配置和低性能。在此，我们基于耐水热塑性弹性体和复合材料的可扩展热处理，将复杂的二维摩擦纳米发电机配置扩展到三维纤维形式。我们使用有限元建模进行力学分析，以了解纤维的变形以及对其力学行为的控制和工程水平，从而指导其尺寸设计以提高电性能。通过具有微纹理图案的功能表面，所得纤维即使在恶劣条件下也能从各种机械变形中可靠地产生先进的电输出。这些机械和电气特性使其能够与大尺寸且可拉伸的表面集成，以产生数百微安的电流。
