Chani Muhammad Tariq Saeed, Karimov Khasan S, Bakhsh Esraa M, Rahman Mohammed M
Center of Excellence for Advanced Materials Research, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
Gels. 2022 Jan 24;8(2):73. doi: 10.3390/gels8020073.
Here we present the fabrication of graphene and jelly (superabsorbent polymer) electrolyte composite-based shockproof flexible electrochemical sensors (Al/Gr-Jelly/Cu) and their properties under the effect of humidity and temperature. A layer of graphene mixed in jelly electrolyte was drop-casted onto porous rubber substrates between preliminary fixed aluminum (Al) and copper (Cu) electrodes followed by rubbing-in. It was observed that the graphene and jelly mixture was mechanically soft and flexible, similar to jelly. Electrically, this mixture (graphene and jelly) behaved as a flexible electrolyte. It was observed that under the effect of humidity ranging from 47 to 98%, the impedances of the sensors decreased by 2.0 times on average. Under the effect of temperatures ranging from 21 to 41 °C the impedances decreased by 2.4 times. The average temperature coefficient of impedances was equal to -0.03 °C. The electrochemical voltage generated by the flexible jelly electrolyte sensors was also investigated. It was found that the initial open-circuit voltages were equal to 201 mV and increased slightly, by 5-10% under the effect of humidity and temperature as well. The short-circuit currents under the effect of humidity and temperature increased by 2-3 times. The Al/Gr-Jelly/Cu electrochemical sensors may be used as prototypes for the development of the jelly electronic-based devices.
在此，我们展示了基于石墨烯与果冻（高吸水性聚合物）电解质复合材料的防震柔性电化学传感器（Al/Gr-Jelly/Cu）的制备及其在湿度和温度影响下的性能。将一层混入果冻电解质中的石墨烯滴铸在预先固定好的铝（Al）电极和铜（Cu）电极之间的多孔橡胶基板上，随后进行研磨。观察到石墨烯与果冻的混合物在机械性能上柔软且具有柔性，类似于果冻。在电学方面，这种混合物（石墨烯和果冻）表现为柔性电解质。观察到在47%至98%的湿度影响下，传感器的阻抗平均降低了2.0倍。在21至41°C的温度影响下，阻抗降低了2.4倍。阻抗的平均温度系数等于 -0.03°C。还研究了柔性果冻电解质传感器产生的电化学电压。发现初始开路电压等于201 mV，并且在湿度和温度的影响下也略有增加，增加了5 - 10%。在湿度和温度影响下的短路电流增加了2 - 3倍。Al/Gr-Jelly/Cu电化学传感器可作为基于果冻电子器件开发的原型。
