TiS2–Polysulfide Hybrid Cathode with High Sulfur Loading and Low Electrolyte Consumption for Lithium–Sulfur Batteries
Abstract
Sulfur cathodes have a high theoretical capacity of 1675 mAh g–1, making the lithium–sulfur batteries a promising technology for future energy-storage devices. However, their commercial viability is faced with challenges arising from intrinsic electrochemical instabilities and inappropriate cell fabrication parameters. We report here the feasibility of employing TiS2 as a conductive polysulfide adsorbent, which allows the use of a high amount of electrochemically active polysulfides in building a TiS2–polysulfide hybrid cathode. The hybrid cathode exhibits long cycle stability at a C/5 rate over 200 cycles with a high areal capacity and energy density of, respectively, 10 mAh cm–2 and 20 mWh cm–2, exceeding those of commercial LiCoO2. Furthermore, such an enhanced electrochemical performance is obtained in cells with a high sulfur content (65 wt %), high sulfur loading (12 mg cm–2), high sulfur mass (12 mg/cathode), and a low electrolyte/sulfur ratio of just 5 μL mg–1.
- Publication Date:
- Research Org.:
- Univ. of Texas at Austin, Austin, TX (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1488315
- Grant/Contract Number:
- EE0007218
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Energy Letters
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 3; Journal ID: ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; 36 MATERIALS SCIENCE
Citation Formats
Chung, Sheng -Heng, Luo, Liu, and Manthiram, Arumugam. TiS2–Polysulfide Hybrid Cathode with High Sulfur Loading and Low Electrolyte Consumption for Lithium–Sulfur Batteries. United States: N. p., 2018.
Web. doi:10.1021/acsenergylett.7b01321.
Chung, Sheng -Heng, Luo, Liu, & Manthiram, Arumugam. TiS2–Polysulfide Hybrid Cathode with High Sulfur Loading and Low Electrolyte Consumption for Lithium–Sulfur Batteries. United States. doi:10.1021/acsenergylett.7b01321.
Chung, Sheng -Heng, Luo, Liu, and Manthiram, Arumugam. Wed .
"TiS2–Polysulfide Hybrid Cathode with High Sulfur Loading and Low Electrolyte Consumption for Lithium–Sulfur Batteries". United States. doi:10.1021/acsenergylett.7b01321. https://www.osti.gov/servlets/purl/1488315.
@article{osti_1488315,
title = {TiS2–Polysulfide Hybrid Cathode with High Sulfur Loading and Low Electrolyte Consumption for Lithium–Sulfur Batteries},
author = {Chung, Sheng -Heng and Luo, Liu and Manthiram, Arumugam},
abstractNote = {Sulfur cathodes have a high theoretical capacity of 1675 mAh g–1, making the lithium–sulfur batteries a promising technology for future energy-storage devices. However, their commercial viability is faced with challenges arising from intrinsic electrochemical instabilities and inappropriate cell fabrication parameters. We report here the feasibility of employing TiS2 as a conductive polysulfide adsorbent, which allows the use of a high amount of electrochemically active polysulfides in building a TiS2–polysulfide hybrid cathode. The hybrid cathode exhibits long cycle stability at a C/5 rate over 200 cycles with a high areal capacity and energy density of, respectively, 10 mAh cm–2 and 20 mWh cm–2, exceeding those of commercial LiCoO2. Furthermore, such an enhanced electrochemical performance is obtained in cells with a high sulfur content (65 wt %), high sulfur loading (12 mg cm–2), high sulfur mass (12 mg/cathode), and a low electrolyte/sulfur ratio of just 5 μL mg–1.},
doi = {10.1021/acsenergylett.7b01321},
journal = {ACS Energy Letters},
number = 3,
volume = 3,
place = {United States},
year = {2018},
month = {2}
}
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Figures / Tables:
Figure 1: (a) Schematic fabrication process of the hybrid TiS2-polysulfide cathode. Microstructural analysis with SEM and EDX of the (b) freshly-made cathode and (c) cycled cathode after 200 cycles.
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Works referencing / citing this record:
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