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Facile Self-Assembly of Exfoliated Graphene/PANI Film for High-Energy Zn-Ion Micro-Supercapacitors

The Zn-ion micro-supercapacitor (ZMSC) is a promising candidate for developing miniaturized and integrated energy storage devices. To achieve high-performance functional groups with simple processing to composite with rod-like active PANI fibers, we prepared exfoliated graphene (EG) with an appropri...

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Detalles Bibliográficos
Autores principales: Wang, Yili, Niu, Jin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10254288/
https://www.ncbi.nlm.nih.gov/pubmed/37298945
http://dx.doi.org/10.3390/molecules28114470
Descripción
Sumario:The Zn-ion micro-supercapacitor (ZMSC) is a promising candidate for developing miniaturized and integrated energy storage devices. To achieve high-performance functional groups with simple processing to composite with rod-like active PANI fibers, we prepared exfoliated graphene (EG) with an appropriate amount of O-containing functional groups. The appropriate O content simultaneously facilitated self-assembly of the EG and PANI fibers and maintained the electric conductivity of the composite, producing a free-standing EG/PANI film without additional conductive additives or current collectors. As an interdigital electrode for the ZMSC, the EG/PANI film showed ultrahigh capacitance of 1.8 F cm(−2) at 2.6 mA cm(−2) (361.3 F g(−1) at 0.5 A g(−1)) and landmark energy density of 755.8 μWh cm(−2) at 2.3 mW cm(−2) (148.2 Wh kg(−1) at 451.7 W kg(−1)). The facile preparation of the high-performance EG/PANI electrode provides a potential path for practical applications with ZMSCs.