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Molybdenum Disulfide Nanosheets Aligned Vertically on Carbonized Silk Fabric as Smart Textile for Wearable Pressure-Sensing and Energy Devices
journal contribution
posted on 2020-02-25, 20:08 authored by Wangdong Lu, Peng Yu, Muqiang Jian, Haomin Wang, Huimin Wang, Xiaoping Liang, Yingying ZhangFlexible
electronics have gained considerable research concern due to their
wide prospect for health monitoring, soft robotics, and artificial
intelligence, wherein flexible pressure sensors are necessary components
of wearable devices. It is well known that the synergistic functions
and multiscale structures of hybrid materials exert tremendous effects
on the performance of flexible devices. Herein, inspired by the unique
structure of the faceplate of sunflowers, we construct a hierarchical
structure by in situ grown vertically aligned molybdenum disulfide
(MoS2) nanosheets on carbonized silk fabric (MoS2/CSilk), which is applied as the sensing material in flexible pressure
sensors. The MoS2/CSilk sensor displayed high sensitivity
and good stability. We demonstrated its applications in monitoring
subtle physiology signals, such as pulse wave and voice vibrations.
In addition, it served as electrodes in lithium-ion batteries. The
MoS2/CSilk electrode delivered ultrahigh first-cycle discharge
and charge capacities of 2895 and 1594 mA h g–1,
respectively. The MoS2/CSilk electrode exhibited a high
capacity of 810 mA h g–1 with a CE close to 100%
even after 300 cycles, suggesting good stability. The excellent overall
performances are ascribed to the unique structure of the MoS2/CSilk and the synergistic effect of CSilk and MoS2. The
concept and strategy of this work can be extended to the design and
fabrication of other multifunctional devices.