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

doi:10.1021/acsaem.8b02007

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 journal › Article › peer-review

9 Scopus citations

Abstract

We report the fabrication and electrochemical performance of metal-foil free Li₄Ti₅O₁₂ (LTO) and LiNi_1/3Co_1/3Mn_1/3O₂ (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 language	English (US)
Pages (from-to)	905-912
Number of pages	8
Journal	ACS Applied Energy Materials
Volume	2
Issue number	1
DOIs	https://doi.org/10.1021/acsaem.8b02007
State	Published - Jan 28 2019

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Publisher Copyright:
© 2018 American Chemical Society.

Keywords

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

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

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.",

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AU - Xiao, Han

AU - Dong, Ziyue

AU - Cavallaro, Kelsey A.

AU - Weeks, Jason A.

AU - Heller, Adam

AU - Ellison, Christopher J

AU - Mullins, C. Buddie

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AB - 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.

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KW - Volumetric energy density

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

Abstract

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Keywords

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