Vanadium Dioxide Nanosheets Supported on Carbonized Cotton Fabric as Bifunctional Textiles for Flexible Pressure Sensors and Zinc-Ion Batteries

Abstract

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 (VO2/CCotton), which is a candidate material used in flexible piezoresistive sensors. As a result, the VO2/CCotton-based pressure sensor behaved with high sensitivity (S = 7.12 kPa–1 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 VO2/CCotton as the cathode and a film of Zn nanosheets/carbon nanotube as the anode. A capacity as high as 301.5 mAh g–1 and remarkable durability of 88.7% capacity retention after 5000 cycles at 10 A g–1 were found. These exceptional outcomes are attributed to the unique three-dimensional architecture and the prominent synergetic effects of CCotton and VO2 and allow for the proposal of novel guidelines for next-generation multifunctional flexible electronics.

Free-standing conductive nickel metal-organic framework nanowires as bifunctional electrodes for wearable pressure sensors and Ni-Zn batteries

“…When pressure was applied to the sensor surface, the plane-to-plane contact area increased and more conductive paths were formed, resulting in lower resistance. 48 As the pressure continued to increase, the contact points of the Ni-CAT@CC were in close contact and the conductive paths reached saturation, leading to resistance changes with lower sensitivity. 27 Figure 3 D shows the real-time response curve of the Ni-CAT@CC-based sensor.…”

Utilization of 2D materials in aqueous zinc ion batteries for safe energy storage devices

“…Similarly, Han et al proposed a self-supporting nanoarray of uniform VO 2 nanosheet, which was directly grown on a 3D carbonized cotton fabric via the hydrothermal method. 58 Advantages such as improved charge transfer at the interfaces, prevention of aggregation of VO 2 nanosheet arrays, and fast ion diffusion pathways provided by the VO 2 nanosheet improved the electrochemical performance. Implemented as flexible quasi-solid-state AZIBs, the device consisting of VO 2 nanosheet array cathode and a Zn nanosheets/carbon nanotube as the anode exhibited high capacity of 301.5 mA h g −1 at a current density of 0.1 A g −1 with excellent long-term cycling performance of 88.7% capacity retention after 5000 cycles at a current density of 10 A g −1 (Fig.…”

“…In particular, from 2012, there was a noticeable emergence of interest in nanomaterials composed of manganesebased cathode 16 where research intensified from 2015 onward, suggesting a growing focus on this category (2015, 17,18 2016, 19 2017, 20 2018, 21,22 2019, [23][24][25] 2020, 26 2021, [27][28][29][30][31] 2022, 32 2023 [33][34][35] ). Additionally, vanadium-based cathodes research intensified after the report on 2019, 10,42,43 2020, [44][45][46][47][48][49] 2021, 11,[50][51][52][53][54][55][56][57] 2022, 58 2023 59,60 ). More recently, the adoption of molybdenum-based materials in AZIBs, particularly MoS 2 , began in 2019.…”

Design of Antireflection and Enhanced Thermochromic Properties of TiO2/VO2 Thin Films

“…The phase transition in VO 2 can also be triggered by force, light and electricity. [ 4–6 ] The phase transition endows VO 2 with potential applications in spacecraft thermal radiation device, [ 7 ] supercapacitor, [ 8 ] electrode material, [ 9,10 ] optical modulator, [ 11 ] optical switch, [ 12 ] microwave passive electronic device, [ 13 ] phase change memory, [ 14 ] field effect transistor, [ 15 ] micro and nano oscillator, [ 16 ] sensor, [ 17 ] THz device, [ 18 ] and smart glass. [ 19–21 ] VO 2 thin films on glass can sense the environmental temperature, and switch the transmittance of sunlight in the infrared wavelength range at high and room temperatures, and adjust the input of solar radiation energy and indoor temperature spontaneously.…”

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effect transistor, [15] micro and nano oscillator, [16] sensor, [17] THz device, [18] and smart glass. [19][20][21] VO 2 thin films on glass can sense the environmental temperature, and switch the transmittance of sunlight in the infrared wavelength range at high and room temperatures, and adjust the input of solar radiation energy and indoor temperature spontaneously.

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