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

Abstract

We report the fabrication and electrochemical performance of metal-foil free Li 4 Ti 5 O 12 (LTO) and LiNi 1/3 Co 1/3 Mn 1/3 O 2 (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

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carbopol 940
Graphite
Oxides
Graphene
Acrylics
Electrodes
Acids
Metal foil
Aerogels
Composite materials
Compressibility
Lithium
Infiltration
Compaction
Lithium-ion batteries
Ions
Fabrication

Keywords

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

Cite this

Pender, J. P., Xiao, H., Dong, Z., Cavallaro, K. A., Weeks, J. A., Heller, A., ... Mullins, C. B. (2019). Compact lithium-ion battery electrodes with lightweight reduced graphene oxide/poly(acrylic acid) current collectors. ACS Applied Energy Materials, 2(1), 905-912. https://doi.org/10.1021/acsaem.8b02007

Compact lithium-ion battery electrodes with lightweight reduced graphene oxide/poly(acrylic acid) current collectors. / Pender, Joshua P.; Xiao, Han; Dong, Ziyue; Cavallaro, Kelsey A.; Weeks, Jason A.; Heller, Adam; Ellison, Christopher J; Mullins, C. Buddie.

In: ACS Applied Energy Materials, Vol. 2, No. 1, 28.01.2019, p. 905-912.

Research output: Contribution to journalArticle

Pender, Joshua P. ; Xiao, Han ; Dong, Ziyue ; Cavallaro, Kelsey A. ; Weeks, Jason A. ; Heller, Adam ; Ellison, Christopher J ; Mullins, C. Buddie. / Compact lithium-ion battery electrodes with lightweight reduced graphene oxide/poly(acrylic acid) current collectors. In: ACS Applied Energy Materials. 2019 ; Vol. 2, No. 1. pp. 905-912.
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