Three-dimensional porous graphene-metal oxide composite microspheres: Preparation and application in Li-ion batteries

Seung Ho Choi; Jung Kul Lee; Yun Chan Kang

doi:10.1007/s12274-014-0646-1

Three-dimensional porous graphene-metal oxide composite microspheres: Preparation and application in Li-ion batteries

Seung Ho Choi, Jung Kul Lee, Yun Chan Kang

Department of Materials Science and Engineering

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

71 Citations (Scopus)

Abstract

The use of new three-dimensional (3D) porous graphene-metal oxide composite microspheres as an anode material for Li-ion batteries (LIBs) is first introduced here. 3D graphene microspheres are aggregates of individual hollow graphene nanospheres composed of graphene sheets. Metal oxide nanocrystals are uniformly distributed over the graphene surface of the microspheres. The 3D porous graphene-SnO₂ microspheres are selected as the first target material for investigation because of their superior electrochemical properties. The 3D porous graphene-SnO₂ and graphene microspheres and bare SnO₂ powders deliver discharge capacities of 1,009, 196, and 52 mAh·g⁻¹, respectively, after 500 cycles at a current density of 2 A·g⁻¹. The 3D porous graphene-SnO₂ microspheres exhibit uniquely low charge transfer resistances and high Li-ion diffusivities before and after cycling.

Original language	English
Pages (from-to)	1584-1594
Number of pages	11
Journal	Nano Research
Volume	8
Issue number	5
DOIs	https://doi.org/10.1007/s12274-014-0646-1
Publication status	Published - 2015 May 18

Keywords

batteries
electrode material
graphene
metal oxide
nanostructures

ASJC Scopus subject areas

Materials Science(all)
Electrical and Electronic Engineering

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10.1007/s12274-014-0646-1

Cite this

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title = "Three-dimensional porous graphene-metal oxide composite microspheres: Preparation and application in Li-ion batteries",

abstract = "The use of new three-dimensional (3D) porous graphene-metal oxide composite microspheres as an anode material for Li-ion batteries (LIBs) is first introduced here. 3D graphene microspheres are aggregates of individual hollow graphene nanospheres composed of graphene sheets. Metal oxide nanocrystals are uniformly distributed over the graphene surface of the microspheres. The 3D porous graphene-SnO2 microspheres are selected as the first target material for investigation because of their superior electrochemical properties. The 3D porous graphene-SnO2 and graphene microspheres and bare SnO2 powders deliver discharge capacities of 1,009, 196, and 52 mAh·g−1, respectively, after 500 cycles at a current density of 2 A·g−1. The 3D porous graphene-SnO2 microspheres exhibit uniquely low charge transfer resistances and high Li-ion diffusivities before and after cycling.",

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author = "Choi, {Seung Ho} and Lee, {Jung Kul} and Kang, {Yun Chan}",

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AU - Choi, Seung Ho

AU - Lee, Jung Kul

AU - Kang, Yun Chan

PY - 2015/5/18

Y1 - 2015/5/18

N2 - The use of new three-dimensional (3D) porous graphene-metal oxide composite microspheres as an anode material for Li-ion batteries (LIBs) is first introduced here. 3D graphene microspheres are aggregates of individual hollow graphene nanospheres composed of graphene sheets. Metal oxide nanocrystals are uniformly distributed over the graphene surface of the microspheres. The 3D porous graphene-SnO2 microspheres are selected as the first target material for investigation because of their superior electrochemical properties. The 3D porous graphene-SnO2 and graphene microspheres and bare SnO2 powders deliver discharge capacities of 1,009, 196, and 52 mAh·g−1, respectively, after 500 cycles at a current density of 2 A·g−1. The 3D porous graphene-SnO2 microspheres exhibit uniquely low charge transfer resistances and high Li-ion diffusivities before and after cycling.

AB - The use of new three-dimensional (3D) porous graphene-metal oxide composite microspheres as an anode material for Li-ion batteries (LIBs) is first introduced here. 3D graphene microspheres are aggregates of individual hollow graphene nanospheres composed of graphene sheets. Metal oxide nanocrystals are uniformly distributed over the graphene surface of the microspheres. The 3D porous graphene-SnO2 microspheres are selected as the first target material for investigation because of their superior electrochemical properties. The 3D porous graphene-SnO2 and graphene microspheres and bare SnO2 powders deliver discharge capacities of 1,009, 196, and 52 mAh·g−1, respectively, after 500 cycles at a current density of 2 A·g−1. The 3D porous graphene-SnO2 microspheres exhibit uniquely low charge transfer resistances and high Li-ion diffusivities before and after cycling.

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Three-dimensional porous graphene-metal oxide composite microspheres: Preparation and application in Li-ion batteries

Abstract

Keywords

ASJC Scopus subject areas

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