An anti-freezing hydrogel based stretchable triboelectric nanogenerator for biomechanical energy harvesting at sub-zero temperature,Journal of Materials Chemistry A

当前位置： X-MOL 学术 › J. Mater. Chem. A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

An anti-freezing hydrogel based stretchable triboelectric nanogenerator for biomechanical energy harvesting at sub-zero temperature
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-06-26 , DOI: 10.1039/d0ta03215h
Dequan Bao _{1,

2,

3,

4,

5} , Zhen Wen _{1,

2,

3,

4,

5} , Jihong Shi _{1,

2,

3,

4,

5} , Lingjie Xie _{1,

2,

3,

4,

5} , Hongxue Jiang _{1,

2,

3,

4,

5} , Jinxing Jiang _{1,

2,

3,

4,

5} , Yanqin Yang _{1,

2,

3,

4,

5} , Weiqiang Liao _{1,

2,

3,

4,

5} , Xuhui Sun _{1,

2,

3,

4,

5}

Affiliation

Stretchable triboelectric nanogenerators (TENGs) have been made available for a large amplitude of human body movement as an effective wearable power source. However, the elasticity and performance of such a kind of device seriously decline in a harsh environment, especially below sub-zero temperature. In this work, an anti-freezing hydrogel was synthesized by one-step radical polymerization of acrylamide monomer in hydroxyethyl cellulose aqueous solution. After adding LiCl into the hydrogel, it can be cooled to temperatures as low as −69 °C without freezing. The hydroxyethyl cellulose not only enhances the mechanical properties as a physical crosslinking agent but also provides water retention properties. With a constant elongation of ∼150%, the anti-freezing hydrogel based TENG (AH-TENG) has been successfully demonstrated to harvest human biomechanical energy to drive wearable electronic devices, even in a harsh ice and snow environment. At a fixed frequency of 2.5 Hz, an AH-TENG with a 3 × 3 cm² area achieved an output of 285 V, 15.5 μA, 90 nC and an instantaneous peak power density of 626 mW m⁻², respectively. This work is anticipated to provide a promising approach for the advancement of flexible energy sources under harsh conditions.

中文翻译：

基于防冻水凝胶的可拉伸摩擦电纳米发电机，用于在零以下温度下收集生物力学能量

可伸展的摩擦电动纳米发电机（TENGs）已作为有效的可穿戴动力源，可用于大幅度的人体运动。但是，这种设备的弹性和性能在恶劣的环境下，特别是低于零温度的环境下会严重下降。在这项工作中，通过丙烯酰胺单体在羟乙基纤维素水溶液中的一步自由基聚合反应合成了一种防冻水凝胶。将LiCl添加到水凝胶中后，可以将其冷却至低至-69°C的温度而不冻结。羟乙基纤维素不仅增强了作为物理交联剂的机械性能，而且还提供了保水性能。恒定伸长率约为150％，基于抗冻水凝胶的TENG（AH-TENG）已被成功证明能够收集人体生物力学能量，以驱动可穿戴电子设备，即使在恶劣的冰雪环境中也是如此。在2.5 Hz的固定频率下，一个3×3厘米的AH-TENG^2个区域分别实现了285 V，15.5μA，90 nC的输出和626 mW m^-2的瞬时峰值功率密度。预期这项工作将为在恶劣条件下发展柔性能源提供有希望的方法。

更新日期：2020-07-14

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11