Fast-response ionogel humidity sensor for real-time monitoring of breathing rate

Xiao, Songhua; Nie, Jianxia; Tan, Rou; Duan, Xiaochuan; Ma, Jianmin; Li, Qiuhong; Wang, Taihong

doi:10.1039/c8qm00596f

Cited by 46 publications

(28 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the environmental category, modulation of cardiac activity was also very common [ 5 , 7 , 50 , 52 , 54 , 163 , 164 , 168 , 174 , 175 , 177 , 178 , 189 , 190 , 196 , 197 , 198 , 199 , 205 , 206 , 207 , 213 , 214 , 219 , 221 , 223 , 224 , 225 , 226 , 229 , 232 , 233 ]. Meanwhile, air temperature and air humidity were the second [ 2 , 64 , 91 , 104 , 107 , 116 , 120 , 128 , 133 , 145 , 153 , 154 , 155 , 156 , 162 ] and third [ 66 , 74 , 75 , 80 , 82 ,…”

Section: Resultsmentioning

confidence: 99%

“…Nose or mouth were also widely used locations to place the sensors. As a particular case of sensors placed in the nose or mouth, several researchers integrated them into a mask [ 66 , 75 , 80 , 82 , 92 , 101 , 107 , 137 , 156 ]. This contrasts with locations, like fingers, waist, arms, or wrists, in which use was residual [ 93 , 115 , 117 , 118 , 126 , 139 , 157 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Sensing Systems for Respiration Monitoring: A Technical Systematic Review

Vanegas

Igual

Plaza

2020

Sensors

View full text Add to dashboard Cite

Respiratory monitoring is essential in sleep studies, sport training, patient monitoring, or health at work, among other applications. This paper presents a comprehensive systematic review of respiration sensing systems. After several systematic searches in scientific repositories, the 198 most relevant papers in this field were analyzed in detail. Different items were examined: sensing technique and sensor, respiration parameter, sensor location and size, general system setup, communication protocol, processing station, energy autonomy and power consumption, sensor validation, processing algorithm, performance evaluation, and analysis software. As a result, several trends and the remaining research challenges of respiration sensors were identified. Long-term evaluations and usability tests should be performed. Researchers designed custom experiments to validate the sensing systems, making it difficult to compare results. Therefore, another challenge is to have a common validation framework to fairly compare sensor performance. The implementation of energy-saving strategies, the incorporation of energy harvesting techniques, the calculation of volume parameters of breathing, or the effective integration of respiration sensors into clothing are other remaining research efforts. Addressing these and other challenges outlined in the paper is a required step to obtain a feasible, robust, affordable, and unobtrusive respiration sensing system.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Sensing Systems for Respiration Monitoring: A Technical Systematic Review

Vanegas

Igual

Plaza

2020

Sensors

View full text Add to dashboard Cite

show abstract

“…In general, Zn(OTf) 2 , LiTFSI, and PEG will absorb water in the air. Combining the above advantages, the doublelayer BC/PEG gel electrolyte was placed in a constant temperature and humidity environment to allow it to absorb water spontaneously, [35] the water uptake of the prepared doublelayer electrolyte was about 9.05 wt.% (Table S1, Supporting Information).…”

Section: Highly Cyclic Stability Of Zn/lifepo 4 Batteries Based On a Hygroscopic Double-layer Gel Polymer Electrolyte At Low Temperaturesmentioning

confidence: 99%

Hygroscopic Double‐Layer Gel Polymer Electrolyte toward High‐Performance Low‐Temperature Zinc Hybrid Batteries

Yan

Wang

Chen

et al. 2021

Batteries & Supercaps

View full text Add to dashboard Cite

Aqueous zinc hybrid batteries have been rapidly developed to overcome the sluggish kinetics of divalent zinc ions in the cathode of Zn-based batteries. However, their cycle life is limited by water decomposition during the operation, specifically at low current rate for long-term cycles. Herein, we propose a zinc hybrid battery with excellent adaptability of lowtemperature, at which the water decomposition is seriously restrained. The battery involves a hygroscopic double-layer gel polymer electrolyte, in which one layer close to the LiFePO 4 cathode provides Li + , and the other layer close to the Zn anode provides Zn 2 + . The use of the double-layer electrolyte can both weaken the water reactivity and increase the salt concentration, leading to a high-performance of the batteries. It enables the hybrid batteries to operate at À 20°C and achieve stability for over 300 cycles with a capacity retention of 85.14 % and Coulombic efficiency of~100 % at a low current rate of 85 mA g À 1 . Moreover, the spontaneous hygroscopic system, opposite to that of "water-in-salt", can efficiently reduce manufacturing costs and improve ionic conductivity. This provides an advanced pathway for designing electrolytes to achieve high-performance and low-cost batteries with excellent adaptability of low-temperature.

show abstract

“…Nowadays, accurate detection of humidity is important for industrial production and home life [1][2][3]. With people's increasing attention to personal health, the application fields of humidity sensors are expanding rapidly, including real-time monitoring of human breathing rate [4,5], sweat management [6], noncontact switch [7], etc. [8,9].…”

Section: Introductionmentioning

confidence: 99%

The Effect of rGO-Doping on the Performance of SnO2/rGO Flexible Humidity Sensor

et al. 2021

View full text Add to dashboard Cite

The development of a flexible and high-performance humidity sensor is essential to expand its new applications, such as personal health monitoring and early diagnosis. In this work, SnO2/rGO nanocomposites were prepared by one-step hydrothermal method. The effect of rGO-doping on humidity sensing performance was investigated. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Raman spectroscopy were used to characterize the nanostructure, morphology and chemical composition of SnO2/rGO nanocomposites. The SnO2/rGO humidity sensitive film was prepared by electrospinning on a polyimide film modified with gold electrodes. The humidity test results show that different doping ratios of rGO have different effects on humidity sensing properties. Among them, the sensor with 2 wt% rGO-doping has a high sensitivity (37,491.2%) within the humidity range as well as the fast response time (80 s) and recover time (4 s). Furthermore, the sensor with 2 wt% rGO-doping remains good flexibility and stability in the case of bending (1000 times). The sensitivity of the 2 wt% rGO-doping sensor at the bending radius (8 mm and 4 mm) is 48,219% and 91,898%, respectively. More importantly, the sensor could reflect different breathing states clearly and track breathing intervals as short as 3 s. The SnO2/rGO flexible humidity sensor with accuracy, flexibility and instantaneity as well as the facile fabrication strategy is conceivable to be applied in the potential application for human health real-time monitoring.

show abstract

Fast-response ionogel humidity sensor for real-time monitoring of breathing rate

Cited by 46 publications

References 47 publications

Sensing Systems for Respiration Monitoring: A Technical Systematic Review

Sensing Systems for Respiration Monitoring: A Technical Systematic Review

Hygroscopic Double‐Layer Gel Polymer Electrolyte toward High‐Performance Low‐Temperature Zinc Hybrid Batteries

The Effect of rGO-Doping on the Performance of SnO2/rGO Flexible Humidity Sensor

Contact Info

Product

Resources

About