Cui Xu, Tian Jiayu, Zhang Chunyan, Cai Rui, Ma Jun, Yang Zhaokun, Meng Qingshi
College of Civil Aviation, Shenyang Aerospace University, Shenyang 110136, China.
College of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China.
ACS Omega. 2021 Jan 20;6(4):2526-2541. doi: 10.1021/acsomega.0c04313. eCollection 2021 Feb 2.
Although nanocarbon-based nanofillers have been widely used to improve the energy-storing and sensing functions of porous materials, the comparison of the effects of different nanocarbon-based fillers on the capacitive and flexible sensing properties of nanocarbon-based porous sponge composite supercapacitor electrodes by combining a carbon nanotube, graphene, and graphene oxide with porous sponge is incomplete. The specific capacitance of carbon nanotube-based electrodes is 20.1 F/g. The specific capacitance of graphene-based electrodes is 26.7 F/g. The specific capacitance of graphene oxide-based electrodes is 78.1 F/g, and the capacity retention rate is 92.99% under 20 000 charge-discharge cycles. Under a bending load of 180°, the capacitance retention rate of graphene oxide sponge composite electrodes is 67.46%, which indicates that the prepared electrodes of supercapacitor have the advantages of high capacitance and good flexibility at the same time. To demonstrate their performance, an array of three graphene oxide supercapacitors in series was constructed, which could light up a red light-emitting diode (LED). The tensile strength of carbon nanotube sponge composite electrodes is 0.267 MPa, and the tensile linearity is 0.0169. The experimental results show that graphene oxide-based sponge composite supercapacitor electrodes have the best capacitance performance and carbon nanotube sponge composites have the most potential as a flexible sensor.
尽管基于纳米碳的纳米填料已被广泛用于改善多孔材料的储能和传感功能，但将碳纳米管、石墨烯和氧化石墨烯与多孔海绵相结合，比较不同的基于纳米碳的填料对基于纳米碳的多孔海绵复合超级电容器电极的电容和柔性传感性能的影响并不全面。基于碳纳米管的电极的比电容为20.1F/g。基于石墨烯的电极的比电容为26.7F/g。基于氧化石墨烯的电极的比电容为78.1F/g，在20000次充放电循环下容量保持率为92.99%。在180°的弯曲负载下，氧化石墨烯海绵复合电极的电容保持率为67.46%，这表明所制备的超级电容器电极同时具有高电容和良好柔韧性的优点。为了展示它们的性能，构建了一个由三个串联的氧化石墨烯超级电容器组成的阵列，该阵列可以点亮一个红色发光二极管（LED）。碳纳米管海绵复合电极的拉伸强度为0.267MPa，拉伸线性度为0.0169。实验结果表明，基于氧化石墨烯的海绵复合超级电容器电极具有最佳的电容性能，而碳纳米管海绵复合材料作为柔性传感器最具潜力。
