Simple fabrication of Co3O4 nanoparticles on N-doped laser-induced graphene for high-performance supercapacitors. Issue 61 (30th November 2021)

• Record Type: Journal Article
• Authors: Khandelwal, Mahima; Nguyen, Anh Phan; Tran, Chau Van; In, Jung Bin
• Is Part Of: RSC advances. Volume 11:Issue 61(2021)
• Page Start: 38547
• Page End: 38554
• Publication Date: 2021-11-30
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra08048b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Simultaneous decoration of Co3 O4 nanoparticles and heteroatom doping on laser-induced graphene based on a duplicate pyrolysis method for supercapacitor applications. Abstract : This study demonstrates a simple strategy to fabricate Co3 O4 on N-doped laser-induced graphene (Co3 O4 -NLIG) based on duplicate laser pyrolysis, enabling the in situ generation of Co3 O4 nanoparticles and heteroatom doping in laser-induced graphene (LIG). Morphological analyses reveal the uniform distribution of Co3 O4 nanoparticles on the surface of the LIG structure. The modification of NLIG with Co3 O4 nanoparticles results in impressive electrochemical performance due to the contributions from electric double-layer capacitance and pseudocapacitance. The optimal Co3 O4 -NLIG is produced at 20 wt% cobalt precursor loading (Co3 O4 -NLIG-20). In a three-electrode setup, this electrode exhibits a specific areal capacitance ( C A ) of 216.3 mF cm −2 at a current density of 0.5 mA cm −2 in a 1 M KOH electrolyte. When the optimal electrodes are assembled into a solid-state supercapacitor (Co3 O4 -NLIG-SC) using a poly(vinyl alcohol) phosphoric acid (PVA–H3 PO4 ) gel electrolyte, a C A of 17.96 mF cm −2 is obtained with good cycling stability.