Sulfur-Embedded Activated Multichannel Carbon Nanofiber Composites for Long-Life, High-Rate Lithium-Sulfur Batteries
Abstract
Despite the 3–5 fold higher energy density than the conventional Li–ion cells at a lower cost, commercialization of Li–S batteries is hindered by the insulating nature of sulfur and the dissolution of intermediate polysulfides (Li2SX, 4 < X ≤ 8) into the electrolyte. The authors demonstrate here multichannel carbon nanofibers that are composed of parallel mesoporous channels connected with micropores as sulfur containment. In addition, hydroxyl functional groups are formed on the carbon surface through a chemical activation to enhance the interaction between sulfur and carbon. In the sulfur embedded composite, the mesoporous multichannel enhances the active material utilization and sulfur loading, while the micropores act as a reaction chamber for sulfur component and trap site for polysulfide with the assistance of the functional groups. Here, this sulfur–carbon composite electrode with 2.2 mg cm–2 sulfur displays excellent performance with high rate capability (initial capacity of 1351 mA h g–1 at C/5 rate and 847 mA h g–1 at 5C rate), maintaining 920 mA h g–1 even after 300 cycles (a decay of 0.07% per cycle). Furthermore, a stable reversible capacity of as high as ≈1100 mA h g–1 is realized with a higher sulfur loading of 4.6 mg cm–2.
- Authors:
-
- University of Texas, Austin, TX (United States)
- Seoul National University (Korea)
- Publication Date:
- Research Org.:
- Univ. of Texas, Austin, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1533071
- Grant/Contract Number:
- SC0005397
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 5; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; Chemistry; Energy & Fuels; Materials Science; Physics; Activation Carbon nanofiber; Electrospinning; Lithium sulfur batteries; Polymer composite
Citation Formats
Lee, Jun Seop, Kim, Wooyoung, Jang, Jyongsik, and Manthiram, Arumugam. Sulfur-Embedded Activated Multichannel Carbon Nanofiber Composites for Long-Life, High-Rate Lithium-Sulfur Batteries. United States: N. p., 2016.
Web. doi:10.1002/aenm.201601943.
Lee, Jun Seop, Kim, Wooyoung, Jang, Jyongsik, & Manthiram, Arumugam. Sulfur-Embedded Activated Multichannel Carbon Nanofiber Composites for Long-Life, High-Rate Lithium-Sulfur Batteries. United States. https://doi.org/10.1002/aenm.201601943
Lee, Jun Seop, Kim, Wooyoung, Jang, Jyongsik, and Manthiram, Arumugam. Mon .
"Sulfur-Embedded Activated Multichannel Carbon Nanofiber Composites for Long-Life, High-Rate Lithium-Sulfur Batteries". United States. https://doi.org/10.1002/aenm.201601943. https://www.osti.gov/servlets/purl/1533071.
@article{osti_1533071,
title = {Sulfur-Embedded Activated Multichannel Carbon Nanofiber Composites for Long-Life, High-Rate Lithium-Sulfur Batteries},
author = {Lee, Jun Seop and Kim, Wooyoung and Jang, Jyongsik and Manthiram, Arumugam},
abstractNote = {Despite the 3–5 fold higher energy density than the conventional Li–ion cells at a lower cost, commercialization of Li–S batteries is hindered by the insulating nature of sulfur and the dissolution of intermediate polysulfides (Li2SX, 4 < X ≤ 8) into the electrolyte. The authors demonstrate here multichannel carbon nanofibers that are composed of parallel mesoporous channels connected with micropores as sulfur containment. In addition, hydroxyl functional groups are formed on the carbon surface through a chemical activation to enhance the interaction between sulfur and carbon. In the sulfur embedded composite, the mesoporous multichannel enhances the active material utilization and sulfur loading, while the micropores act as a reaction chamber for sulfur component and trap site for polysulfide with the assistance of the functional groups. Here, this sulfur–carbon composite electrode with 2.2 mg cm–2 sulfur displays excellent performance with high rate capability (initial capacity of 1351 mA h g–1 at C/5 rate and 847 mA h g–1 at 5C rate), maintaining 920 mA h g–1 even after 300 cycles (a decay of 0.07% per cycle). Furthermore, a stable reversible capacity of as high as ≈1100 mA h g–1 is realized with a higher sulfur loading of 4.6 mg cm–2.},
doi = {10.1002/aenm.201601943},
journal = {Advanced Energy Materials},
number = 5,
volume = 7,
place = {United States},
year = {Mon Nov 07 00:00:00 EST 2016},
month = {Mon Nov 07 00:00:00 EST 2016}
}
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