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Title: Improvement of Li-S battery electrochemical performance with 2D TiS2 additive

Journal Article · · Electrochimica Acta
 [1];  [2];  [1];  [1];  [3];  [1];  [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Northwestern Polytechnical Univ., Xi'an (China)
  3. Stony Brook Univ., Stony Brook, NY (United States)

As a multifunctional cathode additive, TiS2 has been used in Li-S batteries to promote sulfur utilization and improve cell cycle life. The improvement of Li-S cell electrochemical performance in the presence of TiS2 has been attributed to the ability of TiS2 in adsorbing polysulfide. To maximize the interaction between polysulfides and TiS2, the 2-dimensional (2D) TiS2 nano-sheets with highly exposed TiS2 surface area has been successfully synthesized by a two-step sonication synthetic procedure. The 2D TiS2 particles are micron size in the basal plane direction and are nano-sized along the c-axis direction. 2D TiS2 nano-sheets may adsorb polysulfides more effectively than the raw TiS2 powder. Li-S cells with 2D TiS2 nano-sheets additive exhibit better discharge rate capability and significantly reduced capacity-fading after a long term cell cycling. Here, this improvement can be partially attributed to the uniform distribution of 2D TiS2 nano-sheets particles within the sulfur cathode matrix, which induces more uniform sulfur and lithium sulfide deposition during the cell charge and discharge.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1483241
Alternate ID(s):
OSTI ID: 1635835
Report Number(s):
BNL-209472-2018-JAAM
Journal Information:
Electrochimica Acta, Vol. 292, Issue C; ISSN 0013-4686
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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Cited By (4)

Rational design of polar/nonpolar mediators toward efficient sulfur fixation and enhanced conductivity journal January 2020
TiS2 as negative electrode material for sodium-ion supercapattery journal June 2019
Large-diameter and heteroatom-doped graphene nanotubes decorated with transition metals as carbon hosts for lithium–sulfur batteries journal January 2019
TiS 2 nanosheets for efficient electrocatalytic N 2 fixation to NH 3 under ambient conditions journal January 2019