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

研究成果: 雜誌貢獻文章同行評審

摘要

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.

原文英語
文章編號230060
期刊Journal of Power Sources
506
DOIs
出版狀態已發佈 - 九月 15 2021

ASJC Scopus subject areas

  • 可再生能源、永續發展與環境
  • 能源工程與電力技術
  • 物理與理論化學
  • 電氣與電子工程

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