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

Journal Article · · Nano Energy
 [1];  [2];  [3];  [3];  [2]
  1. Huazhong University of Science and Technology (HUST), Wuhan (China); University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  3. Huazhong University of Science and Technology (HUST), Wuhan (China)

Fully lithiated lithium sulfide (Li2S) is 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.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1393066
Alternate ID(s):
OSTI ID: 1338417
Journal Information:
Nano Energy, Vol. 26, Issue C; ISSN 2211-2855
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 55 works
Citation information provided by
Web of Science

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