Improvement of Li-S battery electrochemical performance with 2D TiS2 additive
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Northwestern Polytechnical Univ., Xi'an (China)
- 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
Web of Science
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 |
Similar Records
Vertical Co9S8 hollow nanowall arrays grown on a Celgard separator as a multifunctional polysulfide barrier for high-performance Li–S batteries
Highly Loaded Sulfur Cathode, Coated Separator and Gel Electrolyte for High Rate Li-Sulfur Batteries