Han Fengsai, Luo Jie, Pan Rui, Wu Jiajun, Guo Jiabin, Wang Yongjiang, Wang Lianbo, Liu Min, Wang Zemin, Zhou Ding, Wang Zhanyong, Li Qingwen, Zhang Qichong
School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai, 201418, China.
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123 China.
ACS Appl Mater Interfaces. 2022 Sep 14;14(36):41577-41587. doi: 10.1021/acsami.2c10679. Epub 2022 Aug 31.
Flexible pressure sensors and aqueous batteries have been widely used in the rapid development of wearable electronics. The synergistic functionalities of versatile materials with multidimensional architectures are recognized to have a significant impact on the performance of flexible electronics. Herein, a facile hydrothermal strategy was demonstrated to conformally grow vanadium dioxide nanosheets on carbonized cotton fabrics (VO/CCotton), which is a candidate material used in flexible piezoresistive sensors. As a result, the VO/CCotton-based pressure sensor behaved with high sensitivity ( = 7.12 kPa in the pressure range of 0-2.0 kPa) and a stable sensing ability in a wide pressure scale of 0-120 kPa. Further practical applications were performed in monitoring delicate physiological signals as well, such as twisting, blowing, and voice vibration recognitions. In addition, another application for energy storage was investigated as well. A quasi-solid-state aqueous zinc-ion battery was assembled with VO/CCotton as the cathode and a film of Zn nanosheets/carbon nanotube as the anode. A capacity as high as 301.5 mAh g and remarkable durability of 88.7% capacity retention after 5000 cycles at 10 A g were found. These exceptional outcomes are attributed to the unique three-dimensional architecture and the prominent synergetic effects of CCotton and VO and allow for the proposal of novel guidelines for next-generation multifunctional flexible electronics.
柔性压力传感器和水系电池在可穿戴电子设备的快速发展中得到了广泛应用。具有多维结构的多功能材料的协同功能被认为对柔性电子器件的性能有重大影响。在此，展示了一种简便的水热策略，用于在碳化棉织物（VO/CCotton）上共形生长二氧化钒纳米片，VO/CCotton是一种用于柔性压阻传感器的候选材料。结果，基于VO/CCotton的压力传感器表现出高灵敏度（在0 - 2.0 kPa压力范围内 = 7.12 kPa），并且在0 - 120 kPa的宽压力范围内具有稳定的传感能力。还在监测精细生理信号方面进行了进一步的实际应用，例如扭转、吹气和语音振动识别。此外，还研究了另一种能量存储应用。组装了一种准固态水系锌离子电池，以VO/CCotton为正极，以锌纳米片/碳纳米管薄膜为负极。发现其容量高达301.5 mAh g，在10 A g下5000次循环后容量保持率高达88.7%，具有出色的耐久性。这些优异的结果归因于独特的三维结构以及CCotton和VO的显著协同效应，并为下一代多功能柔性电子器件提出了新的指导方针。
