DataVXAdvanced Functional MaterialsPaper
journal article·2024-12Open access

A Flexible, Bioadhesive, and Breathable On‐Skin Battery Based on Silk Fibroin Hydrogel for Wearable Electronics

Liuyang Gao, Zhiqi Wang, Yiyao Zen, Yimeng Wang, Qinyi Ren, Zhaozhao Ding, Kun Ni, Jigui Tang, Chenkai Zhang, Yiying Wang, Yafeng Zhou, Jingshu Hui, Qiang Lu, Ruiyuan Liu, Xiaohong Zhang

Advanced Functional Materials· Volume 34· Issue 51
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Source abstract

Abstract

Abstract On‐skin electronics rely on flexible power sources for stable operation and comfortable wearing. However, the current materials and device designs of on‐skin batteries for human‐interface electronic systems suffer from inadequate adhesion and impermeability. In this work, a general design of a bioadhesive and breathable on‐skin flexible metal‐air battery is presented. By laterally loading a conducting polymer‐based cathode and a zinc anode onto a biocompatible silk fibroin ionic hydrogel electrolyte film, the battery exhibits good epidermal adhesions (shear strength exceeds 20 kPa and interface toughness exceeds 150 J m−2) and excellent sweat breathability (3 times greater than commercial 3 M breathable dressing). A singular battery can generate an open circuit voltage of up to 1.4 V and a power density of 72 µW cm−2. It shows stable adhesion to the skin for five days, while simultaneously preserving epidermal respiratory function and facilitating natural skin movement. On‐skin integration of the battery array can be easily conducted to increase the electrical output. This battery design enhances the usability, comfort, and safety of wearable electronics, enabling new applications in healthcare, fitness tracking, and beyond.
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Research context

Energy storagePolymersBiomaterials

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Conducting polymers and applications · Polydiacetylene-based materials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Soochow Institute of Energy and Material Innovations Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province College of Energy Soochow University Suzhou Jiangsu 215006 P. R. China

Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University Suzhou Jiangsu 215123 P. R. China

Department of Cardiology The Fourth Affiliated Hospital of Soochow University Medical Center of Soochow University Suzhou Dushu Lake Hospital Suzhou Jiangsu 215028 P. R. China

Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine Vision and Brain Health) Wenzhou Zhejiang 325000 P. R. China

State Key Laboratory of Radiation Medicine and Radiation Protection Institutes for Translational Medicine Soochow University Suzhou 215123 P. R. China

Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou Jiangsu 215123 P. R. China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Jiangsu Province

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