Superior Performance of a Lithium-Sulfur Battery Enabled by a Dimethyl Trisulfide Containing Electrolyte
Abstract The lithium–sulfur (Li‐S) battery offers a high theoretical energy density of ≈2600 Wh kg −1 and low cost, positioning it as a promising candidate for next‐generation battery technology. However, problems including disastrous Li polysulfides dissolution and irreversible Li 2 S deposition have severely retarded the development of Li‐S batteries. To solve these issues, a functional dimethyl disulfide (DMDS)‐containing electrolyte was recently reported that promotes an alternate electrochemical reaction pathway for sulfur cathodes by the formation of dimethyl polysulfides and Li organosulfides as intermediates and reduction products, leading to significantly boosted Li‐S cell capacity with improved cycling reversibility and stability. Here, dimethyl trisulfide (DMTS), a primary discharge–charge intermediate in the DMDS‐containing electrolyte, which is also a commercially available reagent, is further investigated as a cosolvent in functional electrolytes for Li‐S batteries. Due to the higher theoretical capacity of DMTS and its better reactivity with Li 2 S than DMDS, a 25 vol% DMTS‐containing electrolyte enables Li‐S batteries with even higher cell capacity and improved cycling performance than using previous optimal 50 vol% DMDS‐containing electrolyte.
- Research Organization:
- Pennsylvania State Univ., University Park, PA (United States). Dept of Mechanical and Nuclear Engineering
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE
- Grant/Contract Number:
- EE0007795; DE‐EE0007795
- OSTI ID:
- 1435969
- Alternate ID(s):
- OSTI ID: 1441117
- Report Number(s):
- DOE-PENNSTATE-0007795; PII:974
- Journal Information:
- Small Methods, Vol. 2, Issue 6; ISSN 2366-9608
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Conductive and Catalytic Triple-Phase Interfaces Enabling Uniform Nucleation in High-Rate Lithium-Sulfur Batteries
|
journal | October 2018 |
Similar Records
Functional Organosulfide Electrolyte Promotes an Alternate Reaction Pathway to Achieve High Performance in Lithium–Sulfur Batteries
Functional Organosulfide Electrolyte Promotes an Alternate Reaction Pathway to Achieve High Performance in Lithium–Sulfur Batteries