Dynamically Cross-Linked, Self-Healable, and Stretchable All-Hydrogel Supercapacitor with Extraordinary Energy Density and Real-Time Pressure Sensing,Small

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Dynamically Cross-Linked, Self-Healable, and Stretchable All-Hydrogel Supercapacitor with Extraordinary Energy Density and Real-Time Pressure Sensing
Small ( IF 13.0 ) Pub Date : 2023-10-25 , DOI: 10.1002/smll.202305448
Muchun Xu ₁ , Jiajun Zhu ₁ , Jiyang Xie _{1,

2} , Yongyun Mao _{1,

2,

3} , Wanbiao Hu _{1,

2}

Affiliation

Wearable electronics with flexible, integrated, and self-powered multi-functions are becoming increasingly attractive, but their basic energy storage units are challenged in simultaneously high energy density, self-healing, and real-time sensing capability. To achieve this, a fully flexible and omni-healable all-hydrogel, that is dynamically crosslinked PVA@PANI hydrogel, is rationally designed and constructed via aniline/DMSO-emulsion-templated in situ freezing-polymerization strategy. The PVA@PANI sheet, not only possesses a honeycombed porous conductive mesh configuration with superior flexibility that provides numerous channels for unimpeded ions/electron transport and maximizes the utilization efficiency of pseudocapacitive PANI, but also can conform to complicated body surface, enabling effective detection and discrimination of body movements. As a consequence, the fabricated flexible PVA@PANI sheet electrode demonstrates an unprecedented specific capacitance (936.8 F g⁻¹) and the assembled symmetric flexible all-solid-state supercapacitor delivers an extraordinary energy density of 40.98 Wh kg⁻¹, outperforming the previously highest-reported values of stretchable PVA@PANI hydrogel-based supercapacitors. What is more, such a flexible supercapacitor electrode enables precisely monitoring the full-range human activities in real-time, and fulfilling a quick response and excellent self-recovery. These outstanding flexible sensing and energy storage performances render this emerging PVA@PANI hydrogel highly promising for the next-generation wearable self-powered sensing electronics.

中文翻译：

动态交联、可自愈、可拉伸的全水凝胶超级电容器，具有非凡的能量密度和实时压力传感

具有灵活、集成和自供电多功能的可穿戴电子产品变得越来越有吸引力，但其基本能量存储单元在高能量密度、自愈和实时传感能力方面面临挑战。为了实现这一目标，通过苯胺/DMSO乳液模板原位冷冻聚合策略合理设计和构建了一种完全柔性且全可修复的全水凝胶，即动态交联的PVA@PANI水凝胶。 PVA@PANI片材不仅具有蜂窝状多孔导电网格结构，具有优异的柔韧性，为离子/电子的畅通无阻的传输提供众多通道，最大限度地提高赝电容PANI的利用效率，而且可以贴合复杂的体表，实现有效的检测和检测。身体动作的辨别。因此，所制造的柔性PVA@PANI片状电极表现出前所未有的比电容（936.8 F g ^-1 ），并且组装的对称柔性全固态超级电容器提供了40.98 Wh kg ^-1的非凡能量密度，优于之前的材料基于可拉伸 PVA@PANI 水凝胶的超级电容器的最高报告值。更重要的是，这种柔性超级电容器电极可以实时精确监测人体的全方位活动，并实现快速响应和出色的自我恢复。这些出色的柔性传感和储能性能使这种新兴的 PVA@PANI 水凝胶在下一代可穿戴自供电传感电子产品中极具前景。

更新日期：2023-10-25

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