Wang Y, Niu J. Facile Self-Assembly of Exfoliated Graphene/PANI Film for High-Energy Zn-Ion Micro-Supercapacitors.
Molecules 2023;
28:molecules28114470. [PMID:
37298945 DOI:
10.3390/molecules28114470]
[Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 05/24/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023] Open
Abstract
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.
Collapse