Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics,Advanced Energy Materials

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Biomechanical Energy‐Driven Hybridized Generator as a Universal Portable Power Source for Smart/Wearable Electronics
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-02-03 , DOI: 10.1002/aenm.201903663
Muhammad Toyabur Rahman ₁ , SM Sohel Rana ₁ , Md Salauddin ₁ , Pukar Maharjan ₁ , Trilochan Bhatta ₁ , Jae Yeong Park ₁

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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 kΩ 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.

中文翻译：

生物力学能量驱动的混合发电机作为智能/可穿戴电子设备的通用便携式电源

智能电子产品的快速增长需要新颖的解决方案以可持续地为其供电。能够收集生物机械能的便携式电源是减少电池依赖性的一种有前途的现代方法。在此，据报道，一种新型的基于弹性冲击的非共振杂交发电机（EINR-HG）可有效地从户外各种人类活动中获取生物力学能量。通过将非线性电磁发生器与两个接触式摩擦电纳米发电机合理地集成在一起，提出的EINR-HG在相同的机械激励下同时产生混合电输出。通过引入具有纳米线-纳米纤维表面改性的通量集中器，可以显着提高EINR-HG的能量收集效率。使用模拟和振动测试进行优化后，在1 g加速度下于6 Hz的1.5kΩ匹配电阻上具有^-3 g ^-2。在人体运动测试中，通过水平握手，EINR-HG产生的最佳输出功率为131.4 mW。通过定制的电源管理电路，EINR-HG可以作为通用电源，成功驱动商业智能电子产品，包括智能频段和智能手机。这项工作表明了由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。

更新日期：2020-03-27

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