School of Medical Technology, Institute of Engineering Medicine, Beijing Institute of Technology, Beijing 100081, China.
Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.
Int J Mol Sci. 2023 Jan 27;24(3):2497. doi: 10.3390/ijms24032497.
As an energy storage technology, supercapacitors (SCs) have become an important part of many electronic systems because of their high-power density, long cycle life, and maintenance-free characteristics. However, the widespread development and use of electronics, including SCs, have led to the generation of a large amount of e-waste. In addition, achieving compatibility between stability and biodegradability has been a prominent challenge for implantable electronics. Therefore, environmentally friendly SCs based on polypyrrole (PPy)-stabilized polypeptide (FF) are demonstrated in this study. The fully degradable SC has a layer-by-layer structure, including polylactic acid/chitosan (PLA-C) support layers, current collectors (Mg), FF/PPy composite layers, and a polyvinyl alcohol/phosphate buffer solution (PVA/PBS) hydrogel. It has the advantages of being light, thin, flexible, and biocompatible. After 5000 cycles in air, the capacitance retention remains at up to 94.7%. The device could stably operate for 7 days in a liquid environment and completely degrade in vitro within 90 days without any adverse effect on the environment. This work has important implications for eco-friendly electronics and will have a significant impact on the implantable biomedical electronics.
作为一种储能技术，超级电容器 (SCs) 因其高功率密度、长循环寿命和免维护特性而成为许多电子系统的重要组成部分。然而，包括 SCs 在内的电子产品的广泛开发和使用导致了大量电子废物的产生。此外，实现稳定性和生物降解性之间的兼容性一直是植入式电子设备面临的一个突出挑战。因此，本研究中展示了基于聚吡咯 (PPy)-稳定多肽 (FF) 的环保 SC。完全可降解的 SC 具有分层结构，包括聚乳酸/壳聚糖 (PLA-C) 支撑层、集流器 (Mg)、FF/PPy 复合层和聚乙烯醇/磷酸盐缓冲溶液 (PVA/PBS) 水凝胶。它具有轻、薄、灵活和生物相容性的优点。在空气中循环 5000 次后，电容保持率高达 94.7%。该器件可以在液体环境中稳定运行 7 天，并且在 90 天内在体外完全降解，对环境没有任何不良影响。这项工作对环保电子产品具有重要意义，并将对植入式生物医学电子设备产生重大影响。
