Compact lithium-ion battery electrodes with lightweight reduced graphene oxide/poly(acrylic acid) current collectors

Joshua P. Pender, Han Xiao, Ziyue Dong, Kelsey A. Cavallaro, Jason A. Weeks, Adam Heller, Christopher J Ellison, C. Buddie Mullins

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We report the fabrication and electrochemical performance of metal-foil free Li4Ti5O12 (LTO) and LiNi1/3Co1/3Mn1/3O2 (NCM) electrodes supported on conductive and porous reduced graphene oxide/poly(acrylic acid) (rGO-PAA) aerogels. The highly porous rGO-PAA (∼6 mg cm-3) enables slurry infiltration of LTO and NCM to form composite electrodes with tunable mass loadings (∼3-30 mg cm-2), and the resultant composites can withstand 100-fold compression (from 3.2 mm to ∼30-130 μm) to achieve electrode densities of 2-3 g cm-3. The adequate compressibility of the rGO-PAA coupled with removal of the conventional metal-foil weight and volume provides high volumetric energy densities of 1723 Wh L-1 for NCM and 625 Wh L-1 for LTO at low power density, representing a 25% increase in energy density over similar electrodes built with metal-foil current collectors. These metrics demonstrate the utility of the rGO-PAA current collector to reduce the weight and volume of lithium-ion electrodes without sacrificing energy density.

Original languageEnglish (US)
Pages (from-to)905-912
Number of pages8
JournalACS Applied Energy Materials
Volume2
Issue number1
DOIs
StatePublished - Jan 28 2019

Keywords

  • 3D electrode
  • Aerogel
  • Lithium ion battery
  • Reduced graphene oxide
  • Volumetric energy density

How much support was provided by MRSEC?

  • Shared

Reporting period for MRSEC

  • Period 6

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