Heterogeneous Catalysis for Lithium-Sulfur Batteries: Enhanced Rate Performance by Promoting Polysulfide Fragmentations
SCIE
SCOPUS
- Title
- Heterogeneous Catalysis for Lithium-Sulfur Batteries: Enhanced Rate Performance by Promoting Polysulfide Fragmentations
- Authors
- Jeong, Tae-Gyung; Choi, Dong Shin; Song, Hannah; Choi, Jihwan; Park, Shin-Ae; Oh, Si Hyoung; Kim, Heejin; Jung, Yousung; Kim, Yong-Tae
- Date Issued
- 2017-01
- Publisher
- AMER CHEMICAL SOC
- Abstract
- A spatial confiment of polysulfides using the metal compound additives having polar surfaces has been considered to be a promising approach to address the insufficient rate capability and cyclability of lithium-sulfur batteries. Herein, we report a more effective approach outperforming this conventional one: a heterogeneous catalysis to promote polysulfide fragmentations. It was revealed using combined computational and experimental approaches that an ultrastrong adsorption of elemental sulfur on TiN surfaces resulted in a spontaenous fragmentation into shorter chains of polysulfides. This heterogeneous catalysis reaction improved the sluggish kinetics of polysulfide reduction because of the chemical disproportionation at the second plateau. A markedly enhanced rate capability was finally obtained, exhibiting a discharge capacity of 700 mAh g(-1) at a scan rate of 5C.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/103110
- DOI
- 10.1021/acsenergylett.6b00603
- ISSN
- 2380-8195
- Article Type
- Article
- Citation
- Acs Energy Letters, vol. 2, no. 2, page. 327 - 333, 2017-01
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- There are no files associated with this item.
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