Lead-Free Perovskite Nanowire-Employed Piezopolymer for Highly Efficient Flexible Nanocomposite Energy Harvester
Lead-Free Perovskite Nanowire-Employed Piezopolymer for Highly Efficient Flexible Nanocomposite Energy Harvester
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DOI：
10.1002/smll.201704022
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发表时间：
2018-05-09
期刊：
影响因子：
13.3
通讯作者：
Kim, Seung-Hyun
中科院分区：
文献类型：
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作者：
Jeong, Chang Kyu;Baek, Changyeon;Kim, Seung-Hyun
在过去的二十年中，机械能量收集技术以各种方式得到发展，以支持或为小型电子设备提供动力。然而，使用简单且具有成本效益的工艺来增强柔性压电能量收集器的电流和充电性能的策略仍然是一个具有挑战性的问题。在此，使用钙钛矿 BaTiO3 (BT) 纳米线 (NW) 开发了一种 1D-3D (1-3) 全压电纳米复合材料，用于高性能混合纳米复合材料发电机 (hNCG) 装置。柔性hNCG的收集输出高达约14V和约4μA，这甚至高于以前基于压电陶瓷薄膜的柔性能量收集器的当前水平。有限元分析方法模拟研究表明，hNCG器件的优异性能不仅归因于良好控制的BT NW和P(VDF-TrFE)基体内的压电协同作用，还归因于压电聚合物的有效应力传递能力。作为概念验证，灵活的 hNCG 直接附着在手上，利用人体在各种生物力学频率下的运动来收集能量，用于自供电可穿戴贴片设备应用。这项研究可以为高性能可穿戴和生物相容性自给电子产品的新方法铺平道路。
In the past two decades, mechanical energy harvesting technologies have been developed in various ways to support or power small-scale electronics. Nevertheless, the strategy for enhancing current and charge performance of flexible piezoelectric energy harvesters using a simple and cost-effective process is still a challenging issue. Herein, a 1D-3D (1-3) fully piezoelectric nanocomposite is developed using perovskite BaTiO3 (BT) nanowire (NW)-employed poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) for a high-performance hybrid nanocomposite generator (hNCG) device. The harvested output of the flexible hNCG reaches up to approximate to 14 V and approximate to 4 mu A, which is higher than the current levels of even previous piezoceramic film-based flexible energy harvesters. Finite element analysis method simulations study that the outstanding performance of hNCG devices attributes to not only the piezoelectric synergy of well-controlled BT NWs and within P(VDF-TrFE) matrix, but also the effective stress transferability of piezopolymer. As a proof of concept, the flexible hNCG is directly attached to a hand to scavenge energy using a human motion in various biomechanical frequencies for self-powered wearable patch device applications. This research can pave the way for a new approach to high-performance wearable and biocompatible self-sufficient electronics.