†Department of Electrical Engineering, Chungnam National University, Daejeon 305-764, Korea.
‡Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials, Daejeon 305-343, Korea.
ACS Nano. 2015 Apr 28;9(4):4621-7. doi: 10.1021/acsnano.5b01340. Epub 2015 Apr 13.
Two different materials, apart from each other in a triboelectric series, are required to fabricate high performance triboelectric generators (TEGs). Thus, it often limits the choices of materials and causes related processing issues for TEGs. To address this issue, we report a simple surface functionalization method that can effectively change the triboelectric charging sequence of the materials, broadening material choices and enhancing the performance of TEGs. Specifically, we functionalized the surfaces of the polyethylene terephthalate (PET) films either with poly-l-lysine solution or trichloro(1H,1H,2H,2H-perfluorooctyl) silane (FOTS). Consequently, the PET surfaces were modified to have different triboelectric polarities in a triboelectric series. The TEGs, fabricated using this approach, demonstrated the maximum Vopen-circuit (Voc) of ∼330 V and Jshort-circuit (Jsc) of ∼270 mA/m(2), respectively, at an applied force of 0.5 MPa. Furthermore, the functionalized surfaces of TEGs demonstrated superior stability during cyclic measurement over 7200 cycles, maintaining the performance even after a month. The approach introduced here is a simple, effective, and cost-competitive way to fabricate TEGs, which can also be easily adopted for various surface patterns and device structures.
两种不同的材料，在摩擦电序列中彼此分离，这是制造高性能摩擦电发电机（TEG）所必需的。因此，这通常限制了材料的选择，并为 TEG 带来相关的加工问题。为了解决这个问题，我们报告了一种简单的表面功能化方法，可以有效地改变材料的摩擦带电序列，拓宽材料选择，并增强 TEG 的性能。具体来说，我们用聚-l-赖氨酸溶液或三氯（1H，1H，2H，2H-全氟辛基）硅烷（FOTS）对聚对苯二甲酸乙二醇酯（PET）薄膜的表面进行功能化。因此，PET 表面在摩擦电序列中具有不同的摩擦电极性。使用这种方法制造的 TEG，在 0.5 MPa 的外加力下，开路电压（Voc）最大约为 330 V，短路电流（Jsc）最大约为 270 mA/m2。此外，在 7200 次循环测量中，功能化 TEG 表面表现出优异的稳定性，即使在一个月后，仍能保持性能。这里介绍的方法是一种简单、有效、具有成本竞争力的制造 TEG 的方法，也可以很容易地应用于各种表面图案和器件结构。
