Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Nat Commun. 2013;4:1543. doi: 10.1038/ncomms2553.
An important trend in electronics involves the development of materials, mechanical designs and manufacturing strategies that enable the use of unconventional substrates, such as polymer films, metal foils, paper sheets or rubber slabs. The last possibility is particularly challenging because the systems must accommodate not only bending but also stretching. Although several approaches are available for the electronics, a persistent difficulty is in power supplies that have similar mechanical properties, to allow their co-integration with the electronics. Here we introduce a set of materials and design concepts for a rechargeable lithium ion battery technology that exploits thin, low modulus silicone elastomers as substrates, with a segmented design in the active materials, and unusual 'self-similar' interconnect structures between them. The result enables reversible levels of stretchability up to 300%, while maintaining capacity densities of ~1.1 mAh cm(-2). Stretchable wireless power transmission systems provide the means to charge these types of batteries, without direct physical contact.
电子学的一个重要趋势涉及材料、机械设计和制造策略的发展，这些策略使非常规衬底（如聚合物薄膜、金属箔、纸张或橡胶板）的使用成为可能。最后一种可能性特别具有挑战性，因为系统不仅必须适应弯曲，还要适应拉伸。尽管有几种方法可用于电子学，但一个持续存在的困难是电源具有相似的机械性能，以允许它们与电子学共同集成。在这里，我们引入了一组材料和设计概念，用于可再充电锂离子电池技术，该技术利用薄的、低模量硅酮弹性体作为衬底，在活性材料中采用分段设计，并采用不常见的“自相似”互连结构。其结果可实现高达 300%的可拉伸性，同时保持约 1.1 mAh cm(-2)的容量密度。可拉伸的无线功率传输系统提供了为这些类型的电池充电的手段，而无需直接物理接触。
