Shen Qingchen, Jiang Modi, Wang Ruitong, Song Kexian, Vong Man Hou, Jung Woojin, Krisnadi Febby, Kan Ruyu, Zheng Feiyu, Fu Benwei, Tao Peng, Song Chengyi, Weng Guoming, Peng Bo, Wang Jun, Shang Wen, Dickey Michael D, Deng Tao
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA.
Science. 2023 Feb 3;379(6631):488-493. doi: 10.1126/science.ade7341. Epub 2023 Feb 2.
Soft materials tend to be highly permeable to gases, making it difficult to create stretchable hermetic seals. With the integration of spacers, we demonstrate the use of liquid metals, which show both metallic and fluidic properties, as stretchable hermetic seals. Such soft seals are used in both a stretchable battery and a stretchable heat transfer system that involve volatile fluids, including water and organic fluids. The capacity retention of the battery was ~72.5% after 500 cycles, and the sealed heat transfer system showed an increased thermal conductivity of approximately 309 watts per meter-kelvin while strained and heated. Furthermore, with the incorporation of a signal transmission window, we demonstrated wireless communication through such seals. This work provides a route to create stretchable yet hermetic packaging design solutions for soft devices.
软材料往往对气体具有高度渗透性，因此难以制造可拉伸的密封。通过集成间隔物，我们展示了液态金属作为可拉伸密封的应用，液态金属兼具金属和流体特性。这种软密封应用于可拉伸电池和涉及挥发性流体（包括水和有机流体）的可拉伸热传递系统。电池在500次循环后的容量保持率约为72.5%，密封的热传递系统在拉伸和加热时热导率提高了约309瓦每米开尔文。此外，通过加入信号传输窗口，我们展示了通过这种密封进行无线通信。这项工作为软设备创造可拉伸且密封的封装设计解决方案提供了一条途径。
