Graphene aerogels have gained widespread recognition in recent years as electrode materials for supercapacitors, primarily attributed to their excellent stability and impressive specific capacitance. However, further enhancing their specific capacitance is a formidable task. One viable strategy to overcome this hurdle is to composite them with metal oxides. In doing so, the metal oxides boost the specific capacitance of graphene aerogels, while the latter addresses the stability issues inherent in metal oxides. This article reviews recent research on Ni, Co, and Mn oxide–graphene composite aerogels in supercapacitors, summarizing their preparation processes, performance and energy storage mechanism. While existing studies have demonstrated the feasibility of metal oxide–graphene composite aerogels as supercapacitor electrodes, several challenges remain, necessitating deeper exploration by researchers in this field.

Advances in graphene aerogel–metal oxides (Ni, Co, and Mn) composites for supercapacitor electrodes
    Abstract
    1 Introduction
    2 Keyword clustering analysis
    3 Preparation of graphene-based aerogel
    4 Preparation and characterization of MOGAs
        4.1 Preparation of MOGAs
        4.2 Characterization of MOGAs
    5 Performance of MOGAs as electrode of supercapacitor
        5.1 The electrochemical performance of MOGAs (Ni, Co and Mn)
        5.2 Factors affecting electrochemical properties
        5.3 Electrochemical reaction principles of nickel, cobalt, and manganese oxides
    6 Metal oxide–graphene composite aerogel supercapacitor
        6.1 MOGA supercapacitor devices
        6.2 Challenges
    7 Summary and outlook
    Acknowledgements 
    References

• Fang Peng(School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, People’s Republic of China)
• Zhihan Liu(School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, People’s Republic of China)
• Hongge Zhang(School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, People’s Republic of China)
• Haiyun Ou(School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, People’s Republic of China)
• Xu Xiang(School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, People’s Republic of China) Corresponding author