Modification of aluminum current collectors with laser-scribed graphene for enhancing the performance of lithium ion batteries

Er Chieh Cho, Cai Wan Chang-Jian, Yen Ju Wu, Szu Han Chao, Jen Hsien Huang, Kuen Chan Lee, Huei Chu Weng, Shih Chieh Hsu

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the graphene-modified Al foils are prepared to assemble lithium ion batteries (LIBs) through a three-step approach comprising: (1) deposition of the polyamic acid (PAA) on the Al substrate; (2) curing the PAA to form the polyimide (PI)-coated Al foils; (3) converting the PI into porous graphene by CO2 laser irradiation. With integration of the PI derived graphene (PDG) in the LIBs, the inserted PDG layer can enhance the adhesion and interface resistance between the active layer and Al electrode. The LiNi0.5Mn1.5O4 (LNMO)//Li4Ti5O12 (LTO) full cells with PDG layer are also fabricated to evaluate the effect of the modified layer on the cell performance. Compared to the pristine Al electrode, the modified current collector can improve the rate performance and reduce the temperature rise during the charge/discharge process leading to better cycling stability.

Original languageEnglish
Article number230060
JournalJournal of Power Sources
Volume506
DOIs
Publication statusPublished - Sep 15 2021

Keywords

  • Current collector
  • Graphene
  • Laser irradiation
  • Lithium ion battery

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Modification of aluminum current collectors with laser-scribed graphene for enhancing the performance of lithium ion batteries'. Together they form a unique fingerprint.

Cite this