Fu Qingjin, Zhang Wei, Liu Xidie, Liu Yinna, Lei Zhengyang, Zhang Mengtian, Qu Haotian, Xiao Xiao, Zhong Xiongwei, Liu Zhexuan, Qin Peiwu, Yang Jun, Zhou Guangmin
Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China.
Christopher Ingold Laboratory, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
J Am Chem Soc. 2024 Dec 18;146(50):34950-34961. doi: 10.1021/jacs.4c14645. Epub 2024 Dec 4.
On-body batteries with hydrogel electrolytes are a pivotal enabling technology to drive bioelectronics for healthcare and sports, yet they are prone to failure due to dynamic interfacial interference, accompanied by e-waste production. Here, dynamic imine chemistry is proposed to design on-electrode paintable biogel electrolytes that feature temperature-controlled reversible phase transition (gelling within 1.5 min) and ultrafast self-healing capability (6 s), establishing a dynamically self-adaptive interface on cyclically deforming electrodes for shielding on-body Zn-ion batteries from interfacial interference. Consequently, the deformed Zn anode shows an exceptional cycling stability of 400 h regardless of the bending radius, and the as-assembled Zn-I battery delivers sufficient durability to endure 5000 deformation cycles, together extending to 1300 h and 15 000 deformation cycles via dynamically restarting the interfacial electric field, respectively. Also, the features of recyclability, biodegradation, and biocompatibility make the proposed on-body Zn-I batteries appealing in terms of sustainability and biosafety, enabling their successful power supply of heart rate monitors in sports. This work demonstrates the promise of dynamic biogel chemistry for green and biorelated energy-storage systems.
具有水凝胶电解质的可穿戴电池是推动用于医疗保健和运动的生物电子学发展的关键使能技术，但由于动态界面干扰，它们容易失效，并伴随着电子垃圾的产生。在此，提出了动态亚胺化学来设计可在电极上涂覆的生物凝胶电解质，其具有温度控制的可逆相变（1.5分钟内凝胶化）和超快自愈能力（6秒），在循环变形的电极上建立动态自适应界面，以保护可穿戴锌离子电池免受界面干扰。因此，无论弯曲半径如何，变形的锌阳极都表现出400小时的出色循环稳定性，组装好的锌碘电池具有足够的耐久性，能够承受5000次变形循环，通过动态重启界面电场，分别延长至1300小时和15000次变形循环。此外，可回收性、生物降解性和生物相容性等特性使所提出的可穿戴锌碘电池在可持续性和生物安全性方面具有吸引力，能够成功为运动中的心率监测器供电。这项工作证明了动态生物凝胶化学在绿色和生物相关储能系统方面的前景。
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