3D-printed self-standing electrodes for flexible Li-ion batteries

Sekar Praveen, Gyu Sang Sim, Nitheesha Shaji, Murugan Nanthagopal, Chang Woo Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Sizable demand for flexible electronics has resulted in the need for a flexible energy storage device with high performance and unique architectures. Currently, Li-ion batteries (LIBs) are the most desired choice for achieving higher capacity. However, obtaining a high capacity without sacrificing flexibility at the same time is quite tricky using the conventional electrode preparation process, which employs rigid metal current collectors. Herein, we adopt a 3D-printing technology to fabricate flexible self-standing electrodes by incorporating vapour grown carbon fibers (VGCFs) in electrode inks to functionalize a current collector integrated electrode. A fine balance between the electrochemical performance and flexibility has been achieved by varying the ink component ratios. The influences of each component on the mechanical property, conductive nature, and electrochemical performance have been thoroughly investigated. The battery performance is evaluated in coin-type of half and full-cell assemblies. Further, a prototype pouch cell is fabricated using self-standing electrodes to show its flexibility crucial for real time applications.

Original languageEnglish
Article number100980
JournalApplied Materials Today
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • 3D-printing
  • Flexible
  • Li-ion battery
  • Rheological properties
  • Self-standing electrode

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