Significantly enhanced electrochemical properties of LiMn2O4-based composite microspheres embedded with nano-carbon black particles

The cement-based composite shielding materials filled with carbon materials such as ordinary carbon materials (graphite, coke and carbon black), carbon fiber and nano-carbon materials (carbon nano-tube and nano-carbon black) were prepared. The relationship of conductivity and shielding effectiveness in a frequency range of 100 KHz~1.5 GHz was studied. The electric properties of cement-based composites filled with carbon fiber is better than other carbon materials. With the contents of carbon fiber of 5.vol%, the average shielding effectiveness is about 37 dB and the maximum shielding effectiveness reaches 40 dB.

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Effect of nano and micro conductive materials on conductive properties of carbon fiber reinforced concrete

Nanotechnology Reviews ◽

10.1515/ntrev-2020-0034 ◽

2020 ◽

Vol 9 (1) ◽

pp. 445-454 ◽

Cited By ~ 1

Author(s):

Juhong Han ◽

Dunbin Wang ◽

Peng Zhang

Keyword(s):

Carbon Fiber ◽

Carbon Black ◽

Steel Slag ◽

Pressure Sensitivity ◽

Electric Conduction ◽

Conductive Materials ◽

Slag Powder ◽

Steel Slag Powder ◽

Resistivity Variation ◽

Nano Carbon

AbstractIn this study, the pressure sensitivity and temperature sensitivity of the diphasic electric conduction concrete were investigated by measuring the resistivity using the four-electrode method. The diphasic electric conduction concrete was obtained by mixing nano and micro conductive materials (carbon nanofibers, nano carbon black and steel slag powder) into the carbon fiber reinforced concrete (CFRC). The results indicated that, with the increase of conduction time, the resistivity of CFRC decreased slightly at the initial stage and then became steady, while the resistivity of CFRC containing nano carbon black had a sharp decrease at the dosage of 0.6%. With the increase of compression load, the coefficient of resistivity variation of CFRC containing nano carbon black and steel slag powder changed little. The coefficient of resistivity variation increased with the increase of steel slag powder in the dry environment, and CFRC had preferable pressure sensitivity when the mass fractions of carbon fiber and carbon nanofiber were 0.4% and 0.6%, respectively. Besides, in the humid environment, the coefficient of resistivity variation decreased with the increase of steel slag powder, and the diphasic electric conduction concrete containing 0.4% carbon fibers and 20% steel slag powder had the best pressure sensitivity under the damp environment. Moreover, in the dry environment, CFRC containing nano and micro conductive materials presented better temperature sensitivity in the heating stage than in the cooling stage no matter carbon nanofiber, nano carbon black or steel slag powder was used, especially for the CFRC containing steel slag powder.

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Nano Carbon Black-Based High Performance Wearable Pressure Sensors

Nanomaterials ◽

10.3390/nano10040664 ◽

2020 ◽

Vol 10 (4) ◽

pp. 664 ◽

Cited By ~ 2

Author(s):

Junsong Hu ◽

Junsheng Yu ◽

Ying Li ◽

Xiaoqing Liao ◽

Xingwu Yan ◽

...

Keyword(s):

Carbon Black ◽

Pressure Sensor ◽

High Performance ◽

Large Scale ◽

Pressure Sensors ◽

High Sensitivity ◽

Wearable Electronics ◽

Atmospheric Pollutant ◽

Piezoresistive Pressure Sensor ◽

Nano Carbon

The reasonable design pattern of flexible pressure sensors with excellent performance and prominent features including high sensitivity and a relatively wide workable linear range has attracted significant attention owing to their potential application in the advanced wearable electronics and artificial intelligence fields. Herein, nano carbon black from kerosene soot, an atmospheric pollutant generated during the insufficient burning of hydrocarbon fuels, was utilized as the conductive material with a bottom interdigitated textile electrode screen printed using silver paste to construct a piezoresistive pressure sensor with prominent performance. Owing to the distinct loose porous structure, the lumpy surface roughness of the fabric electrodes, and the softness of polydimethylsiloxane, the piezoresistive pressure sensor exhibited superior detection performance, including high sensitivity (31.63 kPa−1 within the range of 0–2 kPa), a relatively large feasible range (0–15 kPa), a low detection limit (2.26 pa), and a rapid response time (15 ms). Thus, these sensors act as outstanding candidates for detecting the human physiological signal and large-scale limb movement, showing their broad range of application prospects in the advanced wearable electronics field.

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