3D printed graphene/nickel electrodes for high areal capacitance electrochemical storage

Guijun Li, Xiaoyong Mo, Wing Cheung Law, Kang Cheung Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

Consumer grade supercapacitors as power supply resources require outstanding electrode materials with large conductivity, high durability and retention rates, as well as large capacity. Graphene is a promising functional material as an electrical double layer capacitance electrode due to its large surface area, high chemical stability and moderate conductivity. However, the existing graphene synthesis methods, including CVD and chemical exfoliation, are limited to lab scale production. Although laser induced graphene has demonstrated outstanding performance as an electrode material for microsupercapacitors, its difficulty to attach to the metallic current collector limits its application as a large capacity electrode material. Herein, laser induced forward transfer of graphene is developed for additively depositing laser induced graphene onto nickel foam as a composite electrode. The laser annealing enhanced the lattice matching between the extended Basal plane of graphene and Ni (111) resulting in its high electrical conductivity (359712 S m -1 ), high retention rate (over 98% capacitance retention after 10000 cycles), and large areal specific capacitance (995 mF cm -2 ) and power density (9.39 mW cm -2 ). The assembled supercapacitors with these additively printed electrodes can work as a USB charger with a stable 5 V output voltage, for charging smart phones and other smart devices.

Original languageEnglish
Pages (from-to)4055-4062
Number of pages8
JournalJournal of Materials Chemistry A
Volume7
Issue number8
DOIs
Publication statusPublished - 24 Jan 2019

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this