Li2S nano spheres anchored to single-layered graphene as a high-performance cathode material for lithium/sulfur cells

Dan Sun; Yoon Hwa; Yue Shen; Yunhui Huang; Elton J. Cairns

doi:10.1016/j.nanoen.2016.05.033

Li₂S nano spheres anchored to single-layered graphene as a high-performance cathode material for lithium/sulfur cells

Dan Sun, Yoon Hwa, Yue Shen, Yunhui Huang, Elton J. Cairns

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

57 Scopus citations

Abstract

Fully lithiated lithium sulfide (Li₂S) has become a promising cathode material for Li/S cells due to its high theoretic capacity (1166 mA h g^-1) and specific energy (2600 W h kg^-1). However, low utilization of sulfur and poor rate capability still hinder the practical application of Li/S cells. In this paper, a carbon coated Li₂S/graphene composite (Li₂S/G@C) was developed by incorporating Li₂S nano spheres with single-layered graphene and further forming a durable protective carbon layer on the surface of the Li₂S particles using a facile CVD method. The high rate capability and remarkable cycle life of the Li₂S/G@C cathode were demonstrated, which was mainly attributed to the unique structure of the Li₂S/G@C that can significantly improve not only the electrical conductivity, but also the mechanical stability of the sulfur cathode.

Original language	English (US)
Pages (from-to)	524-532
Number of pages	9
Journal	Nano Energy
Volume	26
DOIs	https://doi.org/10.1016/j.nanoen.2016.05.033
State	Published - Aug 1 2016
Externally published	Yes

Keywords

Carbon coating
Energy storage
Graphene
Lithium batteries
Lithium sulfide
Sulfur

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Materials Science(all)
Electrical and Electronic Engineering

Access to Document

10.1016/j.nanoen.2016.05.033

Cite this

@article{7b4199bb97ae43c79b5daa61d03e859d,

title = "Li2S nano spheres anchored to single-layered graphene as a high-performance cathode material for lithium/sulfur cells",

abstract = "Fully lithiated lithium sulfide (Li2S) has become a promising cathode material for Li/S cells due to its high theoretic capacity (1166 mA h g-1) and specific energy (2600 W h kg-1). However, low utilization of sulfur and poor rate capability still hinder the practical application of Li/S cells. In this paper, a carbon coated Li2S/graphene composite (Li2S/G@C) was developed by incorporating Li2S nano spheres with single-layered graphene and further forming a durable protective carbon layer on the surface of the Li2S particles using a facile CVD method. The high rate capability and remarkable cycle life of the Li2S/G@C cathode were demonstrated, which was mainly attributed to the unique structure of the Li2S/G@C that can significantly improve not only the electrical conductivity, but also the mechanical stability of the sulfur cathode.",

keywords = "Carbon coating, Energy storage, Graphene, Lithium batteries, Lithium sulfide, Sulfur",

author = "Dan Sun and Yoon Hwa and Yue Shen and Yunhui Huang and Cairns, {Elton J.}",

note = "Funding Information: We thank Tevye Kuykendall and the LBNL Molecular Foundry at the Lawrence Berkeley National Laboratory for supporting the X-ray diffractometer and scanning electron microscopy. Work at the Molecular Foundry was supported by the Office of Science Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract no. DE-AC02–05CH11231 . We appreciate the experimental help from Junchao Zheng. Thanks also go to Xiangyun Song and Zhiyuan Zeng for help with the transmission electron microscope at the National Center for Electron Microscopy and the Material Science Division, respectively. Dan Sun acknowledges a fellowship from the China Scholarship Council (CSC) to perform this work at UC Berkeley and LBNL. Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd.",

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T1 - Li2S nano spheres anchored to single-layered graphene as a high-performance cathode material for lithium/sulfur cells

AU - Sun, Dan

AU - Hwa, Yoon

AU - Shen, Yue

AU - Huang, Yunhui

AU - Cairns, Elton J.

N1 - Funding Information: We thank Tevye Kuykendall and the LBNL Molecular Foundry at the Lawrence Berkeley National Laboratory for supporting the X-ray diffractometer and scanning electron microscopy. Work at the Molecular Foundry was supported by the Office of Science Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract no. DE-AC02–05CH11231 . We appreciate the experimental help from Junchao Zheng. Thanks also go to Xiangyun Song and Zhiyuan Zeng for help with the transmission electron microscope at the National Center for Electron Microscopy and the Material Science Division, respectively. Dan Sun acknowledges a fellowship from the China Scholarship Council (CSC) to perform this work at UC Berkeley and LBNL. Publisher Copyright: © 2016 Elsevier Ltd.

PY - 2016/8/1

Y1 - 2016/8/1

N2 - Fully lithiated lithium sulfide (Li2S) has become a promising cathode material for Li/S cells due to its high theoretic capacity (1166 mA h g-1) and specific energy (2600 W h kg-1). However, low utilization of sulfur and poor rate capability still hinder the practical application of Li/S cells. In this paper, a carbon coated Li2S/graphene composite (Li2S/G@C) was developed by incorporating Li2S nano spheres with single-layered graphene and further forming a durable protective carbon layer on the surface of the Li2S particles using a facile CVD method. The high rate capability and remarkable cycle life of the Li2S/G@C cathode were demonstrated, which was mainly attributed to the unique structure of the Li2S/G@C that can significantly improve not only the electrical conductivity, but also the mechanical stability of the sulfur cathode.

AB - Fully lithiated lithium sulfide (Li2S) has become a promising cathode material for Li/S cells due to its high theoretic capacity (1166 mA h g-1) and specific energy (2600 W h kg-1). However, low utilization of sulfur and poor rate capability still hinder the practical application of Li/S cells. In this paper, a carbon coated Li2S/graphene composite (Li2S/G@C) was developed by incorporating Li2S nano spheres with single-layered graphene and further forming a durable protective carbon layer on the surface of the Li2S particles using a facile CVD method. The high rate capability and remarkable cycle life of the Li2S/G@C cathode were demonstrated, which was mainly attributed to the unique structure of the Li2S/G@C that can significantly improve not only the electrical conductivity, but also the mechanical stability of the sulfur cathode.

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KW - Energy storage

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KW - Lithium batteries

KW - Lithium sulfide

KW - Sulfur

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