Quantum capacitance of graphene-like/graphene heterostructures for supercapacitor electrodes

The charge storage capacity, quantum capacitance, and atomic structures of transition-metal doped graphene-like/graphene heterostructures were studied by density functional theory (DFT). The impact of transition-metal (TM) doping (Ni, Co, Fe, Mn, Cr, V, Ti, and Sc) on the capacitance capacity of sil...

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Bibliographic Details
Published inElectrochimica acta Vol. 461; p. 142655
Main Authors Zhou, Qingxiao, Wang, Li, Ju, Weiwei, Su, Dongtao, Zhu, Juncheng, Yong, Yongliang, Wu, Shilin
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2023
Subjects
Heterostructure
Quantum capacitance
Supercapacitor
Heterostructure
Supercapacitor
Quantum capacitance
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Summary:The charge storage capacity, quantum capacitance, and atomic structures of transition-metal doped graphene-like/graphene heterostructures were studied by density functional theory (DFT). The impact of transition-metal (TM) doping (Ni, Co, Fe, Mn, Cr, V, Ti, and Sc) on the capacitance capacity of silicene/graphene, phosphorene/graphene, germanene/graphene, WSe2/graphene heterostructures was also examined. The findings showed that doping was more useful compared to vacancy defects to enhance the quantum capacitance of heterostructures. The Sc-doped WSe2/graphene exhibited the highest quantum capacitance (838.24 μF/cm2), which is the most promising positive electrode material for supercapacitors. The findings were supposed to provide the theoretical foundation to produce high-capacitance supercapacitors. [Display omitted]
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2023.142655