Sandwich-type functionalized graphene sheet-sulfur nanocomposite for rechargeable lithium batteries

Yuliang Cao; Xiaolin Li; Ilhan A. Aksay; John Lemmon; Zimin Nie; Zhenguo Yang; Jun Liu

doi:10.1039/c0cp02477e

Sandwich-type functionalized graphene sheet-sulfur nanocomposite for rechargeable lithium batteries

Yuliang Cao, Xiaolin Li, Ilhan A. Aksay, John Lemmon, Zimin Nie, Zhenguo Yang, Jun Liu

Research output: Contribution to journal › Article › peer-review

361 Scopus citations

Abstract

A functionalized graphene sheet-sulfur (FGSS) nanocomposite was synthesized as the cathode material for lithium-sulfur batteries. The structure has a layer of functionalized graphene sheets/stacks (FGS) and a layer of sulfur nanoparticles creating a three-dimensional sandwich-type architecture. This unique FGSS nanoscale layered composite has a high loading (70 wt%) of active material (S), a high tap density of ∼0.92 g cm^-3, and a reversible capacity of ∼505 mAh g^-1 (∼464 mAh cm ^-3) at a current density of 1680 mA g^-1 (1C). When coated with a thin layer of cation exchange Nafion film, the migration of dissolved polysulfide anions from the FGSS nanocomposite was effectively reduced, leading to a good cycling stability of 75% capacity retention over 100 cycles. This sandwich-structured composite conceptually provides a new strategy for designing electrodes in energy storage applications.

Original language	English (US)
Pages (from-to)	7660-7665
Number of pages	6
Journal	Physical Chemistry Chemical Physics
Volume	13
Issue number	17
DOIs	https://doi.org/10.1039/c0cp02477e
State	Published - May 7 2011

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1039/c0cp02477e

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title = "Sandwich-type functionalized graphene sheet-sulfur nanocomposite for rechargeable lithium batteries",

abstract = "A functionalized graphene sheet-sulfur (FGSS) nanocomposite was synthesized as the cathode material for lithium-sulfur batteries. The structure has a layer of functionalized graphene sheets/stacks (FGS) and a layer of sulfur nanoparticles creating a three-dimensional sandwich-type architecture. This unique FGSS nanoscale layered composite has a high loading (70 wt\%) of active material (S), a high tap density of ∼0.92 g cm-3, and a reversible capacity of ∼505 mAh g-1 (∼464 mAh cm -3) at a current density of 1680 mA g-1 (1C). When coated with a thin layer of cation exchange Nafion film, the migration of dissolved polysulfide anions from the FGSS nanocomposite was effectively reduced, leading to a good cycling stability of 75\% capacity retention over 100 cycles. This sandwich-structured composite conceptually provides a new strategy for designing electrodes in energy storage applications.",

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AU - Cao, Yuliang

AU - Li, Xiaolin

AU - Aksay, Ilhan A.

AU - Lemmon, John

AU - Nie, Zimin

AU - Yang, Zhenguo

AU - Liu, Jun

PY - 2011/5/7

Y1 - 2011/5/7

N2 - A functionalized graphene sheet-sulfur (FGSS) nanocomposite was synthesized as the cathode material for lithium-sulfur batteries. The structure has a layer of functionalized graphene sheets/stacks (FGS) and a layer of sulfur nanoparticles creating a three-dimensional sandwich-type architecture. This unique FGSS nanoscale layered composite has a high loading (70 wt%) of active material (S), a high tap density of ∼0.92 g cm-3, and a reversible capacity of ∼505 mAh g-1 (∼464 mAh cm -3) at a current density of 1680 mA g-1 (1C). When coated with a thin layer of cation exchange Nafion film, the migration of dissolved polysulfide anions from the FGSS nanocomposite was effectively reduced, leading to a good cycling stability of 75% capacity retention over 100 cycles. This sandwich-structured composite conceptually provides a new strategy for designing electrodes in energy storage applications.

AB - A functionalized graphene sheet-sulfur (FGSS) nanocomposite was synthesized as the cathode material for lithium-sulfur batteries. The structure has a layer of functionalized graphene sheets/stacks (FGS) and a layer of sulfur nanoparticles creating a three-dimensional sandwich-type architecture. This unique FGSS nanoscale layered composite has a high loading (70 wt%) of active material (S), a high tap density of ∼0.92 g cm-3, and a reversible capacity of ∼505 mAh g-1 (∼464 mAh cm -3) at a current density of 1680 mA g-1 (1C). When coated with a thin layer of cation exchange Nafion film, the migration of dissolved polysulfide anions from the FGSS nanocomposite was effectively reduced, leading to a good cycling stability of 75% capacity retention over 100 cycles. This sandwich-structured composite conceptually provides a new strategy for designing electrodes in energy storage applications.

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Sandwich-type functionalized graphene sheet-sulfur nanocomposite for rechargeable lithium batteries

Abstract

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