Islam Muhammad Rakibul, Mollik Shafiqul I
Department of Physics, Bangladesh University of Engineering and Technology (BUET), Dhaka, Bangladesh.
Heliyon. 2020 Oct 17;6(10):e05292. doi: 10.1016/j.heliyon.2020.e05292. eCollection 2020 Oct.
In this work, flexible plasticized starch/graphene oxide (PS/GO) nanocomposites are synthesized by a simple and economic solution cast technique. The structural and surface morphological study of the nanocomposite demonstrates an increased degree of interaction between PS and GO which in turn improves the mechanical strength and thermal stability of the nanocomposite. The influence of GO loading on the capacitive performance of the nanocomposite was evaluated by studying the electrochemical properties. The PS/GO nanocomposite showed an improved capacitive behavior with a specific capacitance of 115 F/g compared to that of pure starch (2.20 F/g) and GO (10.42 F/g) at a current density 0.1 mA/cm. The electrochemical impedance analysis indicates that the incorporation of GO enhances the conductivity of the nanocomposite in the charge transfer resistance at the electrode/electrolyte interface due to the incorporation of GO. The large surface areas provided by the GO sheets allow faster transport of charge carriers into the electrode and improve the electrochemical properties of the PS/GO nanocomposite. Considering the simplicity and effectiveness of the synthesis proses, the result indicates that the PS/GO nanocomposite could be a potential alternative for bio-friendly, flexible energy-storage applications.
在本工作中，通过简单且经济的溶液浇铸技术合成了柔性增塑淀粉/氧化石墨烯（PS/GO）纳米复合材料。对该纳米复合材料的结构和表面形态研究表明，PS与GO之间的相互作用程度增加，这反过来提高了纳米复合材料的机械强度和热稳定性。通过研究电化学性能评估了GO负载量对纳米复合材料电容性能的影响。在电流密度为0.1 mA/cm²时，PS/GO纳米复合材料表现出改善的电容行为，其比电容为115 F/g，相比之下，纯淀粉（2.20 F/g）和GO（10.42 F/g）的比电容较低。电化学阻抗分析表明，由于GO的掺入，GO的加入增强了纳米复合材料在电极/电解质界面处电荷转移电阻中的电导率。GO片层提供的大表面积允许电荷载流子更快地传输到电极中，并改善了PS/GO纳米复合材料的电化学性能。考虑到合成过程的简单性和有效性，结果表明PS/GO纳米复合材料可能是生物友好型柔性储能应用的潜在替代品。
