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Title: Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells

Abstract

The loss of sulfur cathode material as a result of polysulfide dissolution causes significant capacity fading in rechargeable lithium/sulfur cells. Embodiments of the invention use a chemical approach to immobilize sulfur and lithium polysulfides via the reactive functional groups on graphene oxide. This approach obtains a uniform and thin (.about.tens of nanometers) sulfur coating on graphene oxide sheets by a chemical reaction-deposition strategy and a subsequent low temperature thermal treatment process. Strong interaction between graphene oxide and sulfur or polysulfides demonstrate lithium/sulfur cells with a high reversible capacity of 950-1400 mAh g.sup.-1, and stable cycling for more than 50 deep cycles at 0.1 C.

Inventors:
; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1361423
Patent Number(s):
9,673,452
Application Number:
14/347,600
Assignee:
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA LBNL
DOE Contract Number:
AC02-05CH11231
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Sep 28
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Zhang, Yuegang, Cairns, Elton J., Ji, Liwen, and Rao, Mumin. Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells. United States: N. p., 2017. Web.
Zhang, Yuegang, Cairns, Elton J., Ji, Liwen, & Rao, Mumin. Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells. United States.
Zhang, Yuegang, Cairns, Elton J., Ji, Liwen, and Rao, Mumin. 2017. "Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells". United States. doi:. https://www.osti.gov/servlets/purl/1361423.
@article{osti_1361423,
title = {Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells},
author = {Zhang, Yuegang and Cairns, Elton J. and Ji, Liwen and Rao, Mumin},
abstractNote = {The loss of sulfur cathode material as a result of polysulfide dissolution causes significant capacity fading in rechargeable lithium/sulfur cells. Embodiments of the invention use a chemical approach to immobilize sulfur and lithium polysulfides via the reactive functional groups on graphene oxide. This approach obtains a uniform and thin (.about.tens of nanometers) sulfur coating on graphene oxide sheets by a chemical reaction-deposition strategy and a subsequent low temperature thermal treatment process. Strong interaction between graphene oxide and sulfur or polysulfides demonstrate lithium/sulfur cells with a high reversible capacity of 950-1400 mAh g.sup.-1, and stable cycling for more than 50 deep cycles at 0.1 C.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 6
}

Patent:

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