Global to push GA events into
skip to main content

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

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:
; ; ;
Issue Date:
OSTI Identifier:
1414938
Assignee:
The Regents of the University of California (Oakland, CA) LBNL
Patent Number(s):
9,853,284
Application Number:
15/498,113
Contract Number:
AC02-05CH11231
Resource Relation:
Patent File Date: 2017 Apr 26
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE