Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, AIIM Facility, Innovation Campus, University of Wollongong , Wollongong, New South Wales 2522, Australia.
ACS Appl Mater Interfaces. 2013 Sep 25;5(18):9008-14. doi: 10.1021/am402130j. Epub 2013 Sep 5.
There has been an emerging interest in stretchable power sources compatible with flexible/wearable electronics. Such power sources must be able to withstand large mechanical strains and still maintain function. Here we report a highly stretchable H3PO4-poly(vinyl alcohol) (PVA) polymer electrolyte obtained by optimizing the polymer molecular weight and its weight ratio to H3PO4 in terms of conductivity and mechanical properties. The electrolyte demonstrates a high conductivity of 3.4 × 10(-3) S cm(-1), and a high fracture strain at 410% elongation. It is mechanically robust with a tensile strength of 2 MPa and a Young's modulus of 1 MPa, and displays a small plastic deformation (5%) after 1000 stretching cycles at 100% strain. A stretchable supercapacitor device has been developed based on buckled polypyrrole electrodes and the polymer electrolyte. The device shows only a small capacitance loss of 5.6% at 30% strain, and can retain 81% of the initial capacitance after 1000 cycles of such stretching.
人们对与可拉伸电子产品兼容的可拉伸电源越来越感兴趣。这种电源必须能够承受大的机械应变，并且仍然能够维持其功能。在这里，我们报告了一种通过优化聚合物分子量及其与 H3PO4 的重量比来获得的高度可拉伸的 H3PO4-聚乙烯醇（PVA）聚合物电解质，该电解质在导电性和机械性能方面具有很高的电导率和机械性能。该电解质具有 3.4×10(-3) S cm(-1)的高电导率和 410%伸长率时的高断裂应变。它具有机械强度，拉伸强度为 2 MPa，杨氏模量为 1 MPa，在 100%应变下经过 1000 次拉伸循环后仅发生 5%的塑性变形。基于褶皱聚吡咯电极和聚合物电解质，开发了一种可拉伸超级电容器装置。该装置在 30%应变下仅表现出 5.6%的电容损耗，并且在经过 1000 次这样的拉伸循环后，可以保留初始电容的 81%。
