摘要
以间苯二酚、甲醛、无水碳酸钠与氧化石墨烯为原料,通过溶胶-凝胶法制备得到了石墨烯基炭气凝胶。研究了石墨烯含量对材料微观结构与性能的影响。通过SEM对其表面形貌进行观察、XRD分析其结构和BET确定比表面积与孔径分布,再对所制备的材料进行电化学性能分析。结果表明:在进行一定量的氧化石墨烯掺杂后,炭气凝胶(CAG)表面孔隙结构坍塌破损程度明显降低,材料表面的孔洞结构比较完整。掺杂氧化石墨烯能够显著降低放电初始阶段的电压降,并且可以提升材料的电容性能。将CAG-0.25组装成超级电容器,比能量达到29.69 Wh/kg,充放电循环2000次后容量保持率为89.01%。
The graphene-based carbon aerogels were prepared by sol-gel method with resorcinol,formaldehyde,anhydrous sodium carbonate and graphene oxide as raw materials.The effect of graphene content on the microstructure and properties of the material was studied.The surface morphology was observed by SEM,the structure was analyzed by XRD,the specific surface area and pore size distribution were determined by BET,and the electrochemical performance of the prepared material was analyzed.The results show that after doping with a certain amount of graphene oxide,the collapse degree of the surface pore structure of the carbon aerogel(CAG)significantly reduces,and the pore structure of the material surface is relatively complete.Doping graphene oxide can significantly reduce the voltage drop at the initial stage of discharge,and improve the capacitance performance of the material.When CAG-0.25 was assembled into a supercapacitor,the energy density reaches 29.69 Wh/kg,and the capacity retention after 2000 charge and discharge cycles is 89.01%.
作者
陈安国
付紫微
石斌
周雄
廖敏会
CHENAn-guo;FU Zi-wei;SHI Bin;ZHOU Xiong;LIAO Min-hui(State Key Laboratory of Advanced Chemical Power Sources,Guizhou Meiling Power Co.,Ltd.,Zunyi Guizhou 563000,China)
出处
《电源技术》
CAS
北大核心
2021年第1期34-38,共5页
Chinese Journal of Power Sources
关键词
氧化石墨烯
表面形貌
孔径分布
电化学性能
graphene oxide
surface morphology
pore size distribution
electrochemical performance
