Biomechanical Energy-Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics
Biomechanical Energy-Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics
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DOI：
10.1002/aenm.201903663
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发表时间：
2020-02-03
影响因子：
27.8
通讯作者：
Park, Jae Yeong
中科院分区：
文献类型：
--
作者：
Rahman, Muhammad Toyabur;Rana, S. M. Sohel;Park, Jae Yeong
智能电子产品的快速增长需要新颖的解决方案来为其提供可持续的动力。能够收集生物机械能的便携式电源是减少电池依赖的一种有前景的现代方法。据报道，一种新型的基于弹性冲击的非谐振混合发电机（EINR-HG）可以有效地从各种人类户外活动中获取生物力学能量。通过非线性电磁发电机与两个接触式摩擦纳米发电机的合理集成，所提出的EINR-HG在相同的机械激励下同时产生混合电力输出。通过引入具有纳米线-纳米纤维表面改性的通量集中器，EINR-HG 的能量收集效率得到显着提高。使用模拟和振动测试进行优化后，制成的 EINR-HG 在 6 Hz、1 g 加速度下，在 1.5 k Ω 的匹配电阻上提供了 3.13 mW cm(-3) g(-2) 的出色归一化功率密度。在人体运动测试下，EINR-HG 在水平握手时产生 131.4 mW 的最佳输出功率。凭借定制的电源管理电路，EINR-HG 可作为通用电源，成功驱动商业智能电子产品，包括智能手环和智能手机。这项工作展示了生物力学能量驱动的混合发电机为个人电子产品和便携式医疗监测设备供电的巨大潜力。
The fast growth of smart electronics requires novel solutions to power them sustainably. Portable power sources capable of harvesting biomechanical energy are a promising modern approach to reduce battery dependency. Herein, a novel elastic impact-based nonresonant hybridized generator (EINR-HG) is reported to effectively harvest biomechanical energy from diverse human activities outdoors. Through the rational integration of a nonlinear electromagnetic generator with two contact-mode triboelectric nanogenerators, the proposed EINR-HG generates hybrid electrical output simultaneously under the same mechanical excitations. By introducing a flux-concentrator with a nanowire-nanofiber surface modification, significant improvement in the energy harvesting efficiency of the EINR-HG is achieved. After optimizing using simulations and vibration tests, the as-fabricated EINR-HG delivers an outstanding normalized power density of 3.13 mW cm(-3) g(-2) across a matching resistance of 1.5 k omega at 6 Hz under 1 g acceleration. Under human motion testing, the EINR-HG generates an optimal output power of 131.4 mW with horizontal handshaking. With a customized power management circuit, the EINR-HG serves as a universal power source that successfully drives commercial smart electronics, including smart bands and smartphones. This work shows the massive potential of biomechanical energy-driven hybridized generators for powering personal electronics and portable healthcare monitoring devices.